508 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



Atlantis station 2990A; north of Puerto Sagua la Grande, Santa Clara Province 

 (lat. 23°16'30" N., long. 80°11' W.); 759 meters; March 14, 1938 [H. L. Clark, 1941]. 



Atlantis station 3320; Bahia de Cochinos, Santa Clara Province (lat. 22°13' N., 

 long. 81°11' W.); 338 meters; April 4, 1939 [H. L. Clark, 1941]. 



Atlantis station 3406 ; noxthwest of Cayo Coco, Camaguey Province (lat. 22°42' N., 

 long. 78°38' W.); 366 meters; April 29, 1939 [H. L. Clark, 1941]. 



Atlantis station 3463; Bahia de Matanzas Gat. 23°09' N., long. 81°26' W.); 

 420 metei-s; May 9, 1939 [H. L. Clark, 1941). 



Atiantis station 3469; Bahia de Matanzas (lat. 23°12' N., long. 81°22' W.): 777 

 meters; May 9, 1939 [H. L. Clark, 1941]. 



Geographical range. — Coasts of Cuba. 



Bathymetrical range. — From 338 to 777 meters. 



CAKYOMETRA SPINOSA A. H. Clark 



Caryometra spinosa A. H. Clark, Mem. Soc. Cubana Hist. Nat., vol. 14, No. 2, 1940, p. 143 

 (in key), p. 151 (description; Atlantis station 2990; also station 3320), pi. 21, fig. 5. — H. L. Clark, 

 Mem. Soc. Cubana Hist. Nat., vol. 15, No. 1, 1941, p. 12 {Atlantis stations 3320, 3326; 

 not found at station 2990; notes). — A. H. Clark, Bull. U.S. Fish. Comm., vol. 55, 1954, p. 374 

 (listed). 



Diagnostic features. — The cirri are long and slender, with 27 to 34 segments, of 

 which the longest pro.ximal are six times or more as long as the median width, and the 

 terminal arc longer than broad, arranged in 15 columns on the centrodorsal; the 

 brachials have strongly everted and serrate distal ends; P, is about 8 mm. long, with 

 21+ segments; Pj is much stouter than P,. 



Description. — The centrodorsal is roimded conical, 2.3 mm. wide at the base and 

 2.5 mm. high. The cirrus sockets are arranged in 15 coliunns, 3 in each radial area, 

 the columns being separated by ridges which are the appressed lateral portions of the 

 elevated rims of the cirrus sockets. The interradial ridges are not distinguishable 

 from the two radial, so that there are 15 equally spaced coliunns of cirrus sockets about 

 the centrodorsal. The cirrus sockets are laterally flattened, rather deeply excavated 

 with high rims, and have a central transversely oval elevation pierced by the trans- 

 versely oval central canal. There are 2 functional cirrus sockets in each column. 

 The obsolete cirrus sockets in the distal half of the centrodorsal are filled with dense 

 tufts of long fine spicules, wliich give it the appearance of being covered with rather 

 long glassy hairs indistinctly segregated into tufts. 



The ciiTi are XXX, 27-34, from 30 to 33 mm. long, slender and delicate, straight 

 pro.ximally and shghtlj' curved in the distal portion. The first segment is between two 

 and three times as broad as long, the second is about twice as broad as the median length, 

 about twice as long ventrally as dorsally, with a strongly concave distal border, and the 

 third is from two to three times as long as its median width with a slightly expanded 

 proximal and much expanded distal end. The succeeding segments rapidly become 

 elongated, the sixth and following being six times as long as the median width or even 

 longer, gradually mcreasing in width m the distal half so that the produced distal edge 

 overlaps the base of the segment succeeding. On the third and following segments the 

 median dorsal portion of the distal edge is produced into a point which slowly increases 

 in length and prominence, becoming a distally directed dorsal spine. The distal over- 



