OB LITTLE-ZNOWIS' COMATUL^. 491 



1873. H.M.S. ' Challenger.' Station 122. Lat. 9° 5'S. to 9° 10' S. ; 



Long. 34° 49' W. to 34° 53' W. Depth 350 fms. Mud. One 

 specimen. 

 1877-78. U.S. C.S. str. 'Blake.' Station 43. Lat. 24° 8' N.; Long. 



82°51'W. Depth 339 fms. One specimen. 

 1878-79. Ditto. Station 150. Between St. Kitts and Nevis. Depth 

 373^ fms. Ooze and coarse fragments of pumice. Two 

 specimens, one of which is young. 

 Ditto. Station 15L Off Nevis. Depth 356 fms. Two 



specimens. 

 Ditto. Station 222. Off St. Lucia, Depth 422 fms. One 



specimen. 

 Ditto. Station 260. Off Granada. Depth 291 fms. Fine 

 grey ooze. Two specimens. 



The nine individuals of this species which I have examined all 

 agree very well in their general characters, but diflfer conside- 

 rably in the relative proportions of the two outer radials and of 

 the lowest brachials. In all of them which have enough of the 

 arms preserved the first pinnule is on the twelfth brachial, except 

 in one arm of one individual, in which the tenth joint bears the 

 first pinnule. 



2. Ateleceinus cubensis, Fourt., sp. 



Antedon cubensis, Pourt. [pars) Bull. Mus. Comp. Zool. vol. i. no. 11, 

 p. 356; and vol. v. no. 9, p. 214. 



Atelecrinus cubensis, P. H. Carpenter, Bull. Mus. Comp, Zool. vol. ix. 

 no. 4, p. 16. 



Description of an Individual. — Centrodorsal acorn-shaped, 2 

 mm. high and nearly 2 mm. wide, covered by five double rows of 

 closely-set cirrus-sockets, which extend almost to the dorsal pole. 

 Usually four sockets in each row, with very strongly marked 

 horseshoe-shaped rims, the ends of which stand out prominently, 

 so as to give the surface of the plate a very rough appearance. 

 Its uppermost portion bears no sockets or only very rudimentary 

 ones, and is produced at the interradial angles into five promi- 

 nent ridge-like processes, which disappear below between the 

 rows of sockets. The basal ring is pentagonal, with its angles so 

 produced as to rest on the upper ends of these ridges. It is 

 of nearly uniform height ('5 mm.) all round the calyx, rising very 

 slightly at the interradial angles. 



Pirst radials short, broad, and considerably arched. Second 

 radials twice their length, and rather wider than long, with the 

 distal edges incised to receive the proximal angles of the quadrate 

 axillaries, which are also wider than long. 



First brachials well separated laterally, with the inner sides 

 much shorter than the outer ones, which sometimes project 



