Two new species of <I>Epimys</I> from Luzon

Vol.

XXIV,

pp. 87-88

PROCEEDINGS

OFTHE

BIOLOGICAL SOCIETY OF WASHINGTON.

A NEW ^CRINOID GENUS FROM THE INDIAN OCEAN.

BY AUSTIN

^II.

CLARK.

While _studying

the

magnificent

collection of recent crinoicls at the British

Museum,

^{I detected}

among

^the

undetermined

material representatives of several

new

_species,

one

of the

most

interesting^of

which

is the

form

described below. ^\

urged Pro-

fessor F.J.Bell,

who

^{is in}

charge

^{of the}

echinoderm

collections, to describe these

new

_{species; but,}

with

bis characteristic gen- erosity,

he

_{suggested that,} as I

bad become

so

deeply engrossed

in the

study

^{of the recent}crinoids, ^it

would

be

more

_fitting that I

should do

it.

lam

therefore

deeply indebted

^{to Professor Bell} for the privilege ^of

being

^{able to}

make known

the following interesting

new

_genus.

Cyclometra

gen. nov.

Genotype.

—

_Cyclometraflavesc.ens sp. nov.

Systematicposition.

—

_Family Antedonidae, subfamilyHeliometrinse.

Characters.

—

This

new

genus ^isclosely related toHeliometra, which it replaces in the East Indian _region; it is distinguished by having ^P2 markedly^shorterthan Pi insteadof approximately^ofthe

same

_lengthor slightlylonger, as in Heliometra,

and

_bytheoutersegments^ofPi, which are

somewhat

elongated instead ^ofvery^short.

Cyclometra

^flavescens sp. nov.

Description.

—

Centrodorsal roundedconical.

Ilirri xxvin, ^41-4:!. 30

mm.

long; ^first segmentshort, second _nearly as long ^asbroad, the following gradually increasingⁱⁿ length

and

_becoming twice aslong^as broad onthe fourth; the next ^five aresimilar; the fol-

lowinggradually decreaseⁱⁿ length, afterabout ^six

more

becoming about aslong ^asbroad and remaining ^ofthose proportions^until the end^ofthe cirrus.

The

earlier segments are slightly constricted _centrally, with the

20—Peoc. Biol.-<«'.Wash., Vol. XXIV,1911. (87)

88

Clark

— _{A New}

_Crinoid

_from

the

Indian

Ocean.

ends all around finely spinous; the short outer segments ^are carinate, this carinationappearing convex^{in lateral view.}

The

ten

arms

are 130

mm.

long; theⁱ

Br

series

and

brachials are essen- tially as inAntedon bifida, but the distal ends ofthe brachials are

more

prominent

and

are_finelyspinous. Syzygies occurbetweenthe third

and

fourth_brachials, again between theninth

and

tenth

and

fourteenth

and

fifteenth,

and

distally at intervals of three or four oblique muscular articulations.

Pi is very long, 17

mm.

to11*

mm.

_{in length,}with from _forty-two to forty-five segments, ^ofwhich thefirst seven are broader than _long,

and

the distal slightly elongated; P2 is apparently similar, but shorter; P3

1tearsa_genitalgland.

The

distalpinnules areexceedinglyslender, 17

mm.

long.

The

color_{in spirits}isyellow.

Locality.

—

_South of

Ras

Sharwein, Arabia; or, northwest of Sokotra

(14° 20' N.lat.,52° 30'E. Long.⁾; 1200fathoms.

Remarks.

— _The

_type of this species,

which

was collected by ^{the cable} repairship Electra, ^isinthe British

Museum.

The

followingspecies shouldalsobe referred to this

new

genus:

Cyclometra

^{clio (A.}

H.

Clark).

Antedonclio1907. A. H. Clark, ^Proc.U.S. Nat.Mus., ^Vol. 33, p. 79.

Habitat.

—

Southwestern Japan.

Depth.

—

107fathoms.