A new unstalked crinoid from the Philippine Islands

Vol. 31,pp. 37-38

May

^{16, 1918}

PROCEEDINGS

OF THE

BIOLOGICAL SOCIETY OF WASHINGTON

A NEW UNSTALKED CRINOID FROM THE PHILIP- PINE ISLANDS.

BY AUSTIN H. CLARK.

(Published withthepermissionoftheSecretaryof theSmithsonianInstitution.)

In the course

of

her

investigations

among the Philippine

^Is-

lands

the Albatross

dredged an

interesting

new

species of

the genus

Prometra,

which may ^be known

as

Prometra

longipinna,

new

_species.

The

cirri have 14-15 segments ^of which the fourth

and

following are aboutaslong^asbroad; ^thecirruslength^isabout4

mm.

The arms

areabout30

mm.

long, resembling^thoseofP. owsloni.

Pj ^is5

mm.

_long,stiff

and

spine-like,

composed

^{of 11-12} segments ^of which the firstisbroader than _long, thesecond one-third again ^as long asbroad,

and

the fourth

and

following two and one-half to three times as long ^as broad; theterminal three or fourhave prominentlyspinous distalends.

P

2 is5

mm.

_longwith 11-12 segments, exactly resembling

P

x^.

P

3is 5

mm.

_longwith 11 segments^of

which

the outer are_slightly

more

_elongatethanthoseofthe preceding pinnules,

and

the fourth

and

followinghaveeverted

and

_spinous distal ends.

P

4

and

the following pinnules are^3.5

mm.

_longwith 10 segments, smaller

and

weaker thanthe preceding pinnules, though ^the

component

segments ^{are of} about the

same

proportions^; the fourth

and

_following have everted and _spinous distal ends.

The

distal pinnules are ^4.5

mm.

_longwith 14segments ^of which the third

and

_followinghave_slightly produced

and

finely spinous distal ends.

Type.—

^{Cat. No. 35366U. S.} N. M., fromAlbatross Station_5356,North BalabacStrait, PhilippineIslands, in 58fathoms.

11—Proc.Biol. Soc.Wash., Vol.31, 1918. (37)