30 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 125

MORMULA

COOKEI, new species

Plate 5, figures 2a,b

Shell elongate-turrited, cream-yellow.

The

type

and

additional four specimens before

me

have lost all the early whorls.

Those

re-

maining

are strongly

rounded and

crossed

by

strong, protractively slanting axial ribs,

which

are of the

same

strength

from

the

summit

to the periphery

where

they terminate.

Of

these ribs 14 are present

upon

thefirst

and

secondwhorlofthe type^; 16

upon

the third; 17

upon

the fourth; 18

upon

thefifth,

and

20

upon

thelast turn.

At

irregular intervals

some

of theribs

become

fused to

form

a strong varix.

The

intercostal spaces are about as

wide

as the ribs

and

are crossed

by

seven incised spiral lines or grooves.

Of

these thefirst

two below

the

summit

are very slender.

While

the last one immediately above the periphery is very broad, the

two

above this are about half as strong as the

two

aboveit

and

twice as strongasthe

two below

the summit.

This arrangement,as well as the spacing,is best visualized

by examin-

ing the sketch (pi. 5, ^fig. 2b).

The

suture is considerably constricted.

The

periphery is well rounded.

The

base is short, hemispherical,

and

without sculpture.

The

aperture is subquadrate; the columella is slender, vertical, slightly revolute

and

provided with a feeble fold at its insertion; the parietal wall is glazed

by

a thin callus; the outer lip is thin

and

bears four strong spiral cords within.

The

type,

U.S.N.M. No.

561683,

comes from

the

PHocene

of

North

St. Petersburg, Fla. It has 6.2 whorls remaining

which

measure:

Length, _5.9

mm.,

diameter 2.0

mm. ^U.S.N.M. No. 561684

^contains

two

additional specimens

from

the

same

source,

and two more

are in the collection of the

A.N.S.P.

The

very strongly

rounded

whorls readily distinguish this species

from

the other

Mormulas.

It is a pleasure to

name

^this species for Dr. C.

Wythe

Cooke, of the United States Geological Survey,

who

has devoted a lifetime of energytotheunraveling

and

elucidationof southeastern

United

States geology

and

paleontology.

MORMULA WOODRINGI,

new species Plate4, figures 8a,b

Shell elongate-turrited, cream-yellow.

The

early whorls are lost in the unique type; those remaining are moderately

rounded and

crossedby strong, protractively slanting, rather distantlyspaced axial ribs,

which

are of the

same

strength

from

the

summit

to theperiphery

NO. 2

PYRAMIDELLID MOLLUSKS — ^BARTSCH

3I

where

they terminate.

Of

these ribs lo are present

upon

the first

two

of the remaining turns, ii

upon

the third; 12

upon

the fourth,

and

14

upon

the rest of the whorls.

At

irregular intervals

some

of these ribs

become

thickened to

form

a varix.

The

intercostal spaces are deeply impressed

and

a ^littlewider than the ribs.

The

intercostal spaces are

marked by 20

incised spiral lines

and

grooves,

which

vary decidedly in strength

and

spacing.

They

are best visualized

by

ex-

amining

the detailed sketch

on

plate _4, figure 8b.

The

suture is well constricted

and

rendered

wavy by summits

of the axial ribs.

The

periphery is well rounded.

The

base is short, strongly rounded, smooth,

and

without sculpture.

The

aperture is subquadrate; the anterior portion of the columella

and

basal lipare broken; the

upper

part of the columella is thick,

and

provided with a

weak

fold; the parietal wall is glazed with a thin callus; the fractured outer lip is thick.

The

type,

U.S.N.M. No.

561685,

comes from

the Pliocene of

North

St. Petersburg,Fla. Ithas8.2whorlsremaining

and measures

:

Length

5.1

mm.,

diameter 1.8

mm.

The

^less

rounded

whorls

and

entirely different spiral sculpture easily distinguish this species

from Mormula

cookei (p. 30).

I take pleasure in

naming

thisspecies for Dr.

W.

^P.

Woodring,

of the

United

States Geological Survey,

whose

exhaustive

and

masterful report

on

the fauna of the

Bowden

beds of Jamaica lent a

new

im- petusto

West

Indian

and

Tropical

American

paleontology.

MORMULA MARSHALLI,

newspecies Plate 5, figures sa,b

Shell elongate-turrited, slender, cream-yellow.

The

early whorls in all our specimens have been lost.

Those

remaining are slightly

rounded and marked by

very strong, broad, slightly protractively slanting axial ribs,

which

are of the

same

strength

from

the

summit

of the whorls to the periphery,

where

they terminate.

Of

these ribs 14 ^are present

on

all the whorls.

At

irregular intervals

some

of the ribs

become

thickened to

form

a

weak

varix.

The

intercostal spaces are a ^little

narrower

than the ribs

and

are crossed

by

13 in- cised lines

and

grooves

which

vary greatly in strength

and

spacing

and

are best visualized

by

viewing the detailed sketch

on

plate _5, figure 5b.

The

suture is slightly constricted

and

rendered

wavy by

the

summit

of the axial ribs.

The

periphery is well rounded.

The

base is hemispherical

and

without sculpture.

The

aperture is sub- quadrate; the columella is thick, vertical,

and

provided with a strong

32 SMITHSONIAN MISCELLANEOUS COLLECTIONS

VOL. I25 foldat its insertion; theparietal wall is glazedwith a thincallus; the outerlip is thick

and

provided with

4

^{strongspiral folds deepwithin.}

The

type,

U.S.N.M. No.

561686,

comes from

thePliocene of

North

St. Petersburg, Fla. It has 9.5 whorls remaining

which

measure:

Length

6.0

mm.,

diameter 1.7

mm. U.S.N.M. No. 561687

contains

an

additional specimen

from

the

same

source

and

another is in the collection of the

A.N.S.P.

The much

narrov/er intercostal spaces

and

different spiral

markings

willreadily distinguish this species

from Mormula

woodringi (p.30).

I take pleasure ⁱⁿ

naming

this species for

William

B. Marshall,

my

colleague,

who was

the able assistant curator of the division of

moUusks

for

many

years.

MORMULA

HARRISI, new species

Plate _5, figures la,b

Shell elongate-turrited, cream-yellow.

The

nucleus consists of a

little

more

than 2 strongly rounded,

smooth

whorls that

form

a de- pressed helicoid spire

whose

axis is at right angles to that of the postnuclear ^spire, in the first

whorl

of

which

the nucleus is about one-third immersed.

The

postnuclear whorls are almost flattened

and

crossed

by

^moderately strong axial ribs,

which

have the

same

strength

from

the sum.mit to the periphery,

where

they terminate.

Of

theseribs 16 are present

upon

the second to fifth whorl; 17

upon

the sixth; 18

upon

the seventh,

and 20 upon

the rest of the whorls.

At

irregular intervals

some

of the ribs

become

thickened

and form

a

weak

varix.

The

intercostal spaces are about as

wide

as the ribs

and

are crossed

by 26

incised lines or pits

which

vary greatly in width

and

spacing

and

are best described

by

our detailed sketch (pi. 5, fig. lb).

The

suture is well

marked and

rendered

wavy by

the axial ribs atthe

summit

of the whorls.

The

peripheryiswellrounded.

The

base is hemispherical

and

without sculpture.

The

aperture is sub- quadrate; the columella is slender, vertical, slightly revolute

and

provided with a

weak

foldatits insertion; the parietal wall isglazed

by

a thin callus; the outer lip is thin, gently curved,

and shows no

internal cords.

The

type,

U.S.N.M. No.

561688,

comes from

the Pliocene of

North

St. Petersburg, Fla. It has 10 postnuclear whorls

and

measures

:

Length

6.0

mm.,

diameter 2.4

mm. U.S.N.M. No. 561689

^contains three specimens

from

the

same

source,

and

four

more

are in the collection of the

A.N.S.P.