cirrus sockets, four in two closely crowded columns in each radial area, the columns in each 
radial area separated from those in the adjacent radial areas by narrow irre<^ular lines. 
The arm structure is as in /'s. inusitata\ the arms were probably about 20 mm. long. 
P., bears a small jrenital sjland. 
15. Psatlixroinctra sp. 
Stat. 38. 7°35'.4^-. ii7°28'.6E. Flores Sea. 521 Metres. Fragments. 
Two arm fragments and an .incomplete cirrus from Stat. 38 belong to a species near, 
if not, Ps. major. The incomplete cirrus is 24 mm. long and is composed of 18 .segments. 
Leptometra A. [I. Clark. 
Key to the .Species of the <jenus Leptometra. 
a' Cirri very long and slender, gradually tapering to a point distally, all of the 
component segments being about twice as long as broad, the outer without 
any modilication of the distal dorsal edge, so that the dorsal profile remains 
smooth; arms up to 150 mm. in length; cirri 50 mm. to 60 mm. long 
(Mediterranean and Aegean Seas; 54 — 1292 Metres) phalangmm 
a- Cirri proportionately shorter, without a distal taper and hence in the outer part 
appearing considerably stouter, composed in the proximal portion of segments 
which are about twice as long as broad, the distal segments becomins^ shorter, 
about as long as broad to, at most, one third again as long as broad, and 
having the distal dorsal edge somewhat swollen so that the dorsal profile of 
the cirri is slightly scalloped; arms up to 125 mm. in length; cirri 30 mm. to 
40 mm. (usually 35 mm. to 40 mm.) long (from the western coast of 
Scotland, and Ireland, southward to Madeira; 45 — 450 Metres) ccltica 
Zenometra A. H. Clark. 
The onl)- species in the genus Zenometra is 
I. Zenometra colnmttaris (P. H. Carpenter). 
P. \\. C.VRi'ENTER. Bull. Mus. Comp. Zoo!., vol. 9, 1881, N" 4, p. 169, pi. i, fig. 8 (Autedon 
coliimnaris). 
A. H. Cl.ARK. Proc. U. S. National Museum, vol. 34, 1908, p. 237 [Zenometra pyraiiiidalis). 
H.AKTLAUU. Memoirs Mus. Comp. Zoo!., vol. 27, 1912, N" 4, p. 406, pi. 8, fig. 13; pi. 10, 
figs. 6 — 14; pi. 15, fig. 9 (Anledon coliiiniiaris). 
Sarametra A. H. Clark. 
The only species in the genus Sarametra is 
I. Sarametra triseriaiis (A. H. Clark). 
A. H. Clark. Proc. U.S. National Museum, vol. 34, 190S, p. 219 [Zenometra triseriaiis). 
