608 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



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

 (lat. 2316'30" N., long. 8011' W.); 759 meters; March 14, 1938 [H. L. Clark, 1941]. 



Atlantis station 3320; Bahia de Cochinos, Santa Clara Province (lat. 2213' N., 

 long. 8111' W.); 338 meters; April 4, 1939 [H. L. Clark, 1941]. 



Atlantis station 3406 ; northwest of Cayo Coco, Camaguey Province (lat. 2242' N., 

 long. 7838' W.); 366 meters; April 29, 1939 [H. L. Clark, 1941]. 



Atlantis station 3463; Bahia de Matanzas (lat. 2309' N., long. 8126' W.); 

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



Atlantis station 3469; Bahia de Matanzas Gat. 2312' N., long. 8122' W.): 777 

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



Geographical range. Coasts of Cuba. 



Bathymetrical range. From 338 to 777 meters. 



CARYOMETRA 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 

 Gisted). 



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

 which the longest proximal are six times or more as long as the median width, and the 

 terminal are 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; P 2 is much stouter than PL 



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

 2.5 mm. high. The cirrus sockets are arranged in 15 columns, 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 columns of cirrus sockets about 

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

 with high runs, 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 ha the distal half of the centrodorsal are filled with dense 

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

 long glassy hairs indistinctly segregated into tufts. 



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

 proximally and slightly 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 tunes 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 tunes as long as the median width or even 

 longer, gradually increasing in width in 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- 



