616 BULLETIN 82, tmiTED STATES NATIONAL MUSEUM VOLUME 1 



tccnth brachial the second syzygy is between brachials 9+10 and the third is between 

 brachials 13 + 14. The distal intersyzygial interval is usually 4, less commonly 3, 

 and very seldom 5 muscular articulations. 



Pi is estimated to have about 15 segments with only one short basal segment; 

 the second segment is already somewhat longer than broad, and the following segments 

 are slender and greatly elongated, up to 1.5 mm. in length. No pinnule is entire. 

 The best preserved is 10 mm. long, \vith 13 segments. The length of an uninjured 

 pinnule is estimated as about 12 to 13 mm. No P, is entire. The best preserved has 

 10 segments, of whicli the first is short and those following are as in Pi. Apparently 

 P. is not shorter than P,. Pj is in no case entire. The best preserved also has elon- 

 gated segments with the exception of the two short basal ones. There are in all 7 

 segments preserved. Apparently Pj is smaller and more slender than Pi. Of tlie later 

 pinnules, of which a few segments are preserved, it can only be said that the two basal 

 segments are short, those following elongate. In addition it may be noted that on the 

 distal arm fragments the pinnules show a peculiar condition in the second short basal 

 segment. The distal border is not straight but is drawn out into a small proxinially 

 directed point; besides, the articulation between the first and second segments is 

 broader than the othei"s. 



The disk is 9 mm. in diameter, unplated and not incised. The arms are free 

 beyond the third brachial. Sacculi were not found. 



In color the skeleton is uniform white, the disk gray, and the brachial ambulacra 

 j'ellow brown. 



The single specimen upon which this species is based was badly broken, and 

 Hartlaub said tliat it was only after long hesitation that he decided to describe it. 

 Also, Carpenter to all appearances had considered it as representing a new species, 

 as was sho\vn bj' the figure he had prepared. Carpenter left no specific designation 

 with the specunen, only the Blake label havmg been found with it. But Hartlaub 

 considered that the characters given in his description were sufficient to justify the 

 establislunent of a new species. 



Localities. — Atlantis station 2960; south coast of Cuba; Bahia de Cochinos, Santa 

 Clara Province (lat. 22°07' N., long. SrOS'SO" W.);493 meters; February 18, 1938 

 [H. L. Clark, 1941]. 



Atlantis station 2963D; south coast of Cuba; Bahia de Cochinos, Santa Clara 

 Province (lat. 22°07' N., long. 81°0S' W.); 402-502 meters; February 25, 1938 [H. L. 

 Clark, 1941]. 



Atlantis station 3385; Old Bahama Channel north of Camaguey Province, Cuba 

 (lat. 22°33' N., long. 78°02' W.); 530 meters; April 26, 1939 [H. L. Clark, 1941]. 



Atlantis station 2983 A; Santaren Channel, north of Santa Clara Province, Cuba 

 (lat. 23°11' N., long. 79°08' W.) ; 429 meters; March 12, 1938 [H. L. Clark, 1941). 



Atlantis station 3386; Old Bahama Channel, north of Camaguey Province, Cuba 

 (lat. 22°33' N., long. 78°11'30" W.); 402 meters; April 26, 1939 [H. L. Clark, 1941]. 



Atlantis station 3389; north of Cayo Coco, Camaguey Province, Cuba (lat. 22°32' 

 N., long. 78°08' W.); 402 meters; April 27, 1939 [H. L. Clark, 1941]. 



Atlantis station 3391 ; north of Cayo Coco, Camaguey Province, Cuba (lat. 22°34' 

 N., long. 78°14' W.); 402 meters; April 27, 1939 [A. H. Clark, 1940; H. L. Clark, 1941] 

 (4, M.C.Z.). 



Atlantis station 3392; north of Caj'o Coco, Camaguey Province, Cuba (lat. 22°35' 

 N., long. 78°16' W.); 411 meters; April 27, 1939 [H. L. Clark, 1941]. 



