231 



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 irregular lines. 



The arm structure is as in Ps. inusitata-, the arms were probably about 20 mm. long. 



P„ bears a small genital gland. 



15. P sathyrometra sp. 



Stat. 38. 7°35'.4S., ii7°28'.6E. Flores Sea. 521 Metres. Fragments. 



Two arm fragments and an incomplete cirrus from Stat. 38 belong to a species near, 

 if riot, Ps. major. The incomplete cirrus is 24 mm. long and is composed of 18 segments. 



Leptometra A. H. Clark. 

 Key to the Species of the Genus Leptometra. 



a 1 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 modification 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 

 (M edi t erranean and Aegean Seas; 54 — 1292 Metres) phalangium 



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 becoming 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) celiica 



Zenometra A. H. Clark. 

 The only species in the genus Zenometra is 



1. Zenometra eolumnaris (P. H. Carpenter). 



P. H. Carpenter. Buil. Mus. Comp. Zool., vol. 9, 1SS1, N° 4, p. 169, pi. 1, fig. 8 {Antedon 



eolumnaris). 

 A. H. Clark. Proc. U.S. National Museum, vol, 34, 1908, p. 237 {Zenometra pyramidalis). 

 HARTLAUB. Memoirs Mus. Comp. Zool., vol. 27, 1912, N° 4, p. 406. pi. 8, fig. 13; pi. 10, 



figs. 6 — 14; pi. 15, fig. 9 {Antedon eolumnaris). 



Sarametra A. H. Clark. 



The only species in the genus Sarametra is 

 1. Sarametra triserialis (A. H. Clark). 



A. H. Clark. Proc. U.S. National Museum, vol. 34, 190S, p. 219 [Zenometra triserialis). 



