610 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



This proximal bifurcation of the spicule with the upper branch more developed than the 

 lower is, so far as I am aware, unique. The distal ends of the spicule bifurcate, the 

 branches of the fork being from a third to half as long as the distance from the bifurca- 

 tion to the central angle of the spicule. The upper branch of the fork is smooth and ends 

 in a sharp point; the lower branch, which is slightly longer, bears in its outer half many 

 slender spines projecting from it at right angles. In the proximal portion of the pinnule 

 the upper branch of the bifurcation usually bears spines on the upper half and the lower 

 branch bears a long, downward pointing, sharp spine at about the middle, or is itself 

 bifurcated. At the pinnule tips the spicules become reduced to long slender rods curved 

 slightly in the middle with the lower end bifurcated, the branches of the bifurcation being 

 very short, and the upper end undivided and sharply pointed and bearing a few small 

 lateral spines. There are occasional, though rare, modifications. At the pinnule base 

 the earliest spicules are often somewhat curved or sinuous simple rods pointed at the 

 lower end and somewhat roughened at the distal end. One spicule was found in the 

 shape of a Y with all the branches of equal length. 



The color (dry) is yellowish white, the perisome brown. 



Notes. Dr. Hubert Lyman Clark said that this is another scarce novelty taken 

 only in 1939, and then only in the Bahia de Cochinos on the southern coast of Santa 

 Clara Province, Cuba, in 185 to 265 fathoms (Atlantis stations 3320 and 3326). The 

 more or less everted minutely spinous upper margin of the brachials and the extremely 

 long (35 to 45 mm.) cirri are distinctive. In none of the five specimens are any of the 

 arms approximately whole, but the fragments indicate that they were at least 75 to 

 80 mm. long in life. Dr. Clark said that the holotype came from station 3320, not 

 2990 as stated by me. The species was not found at station 2990. 



Localities. Atlantis station 3320; Bahia de Cochinos, south coast of Santa Clara 

 Province, Cuba (lat. 2213' N., long. 8111' W.); 338 meters; April 4, 1939 [A. H. Clark, 

 1940; also given by error as station 2990; H. L. Clark, 1941] (2, the holotype [M.C.Z., 

 1014] and one other). Type locality. 



Atlantis station 3326; Bahia de Cochinos Gat. 2209' N., long. 8109' W.); 484 

 meters; April 4, 1939 [H. L. Clark, 1941]. 



Geographical range. Known only from Bahia de Cochinos on the south coast of 

 Santa Clara Province, Cuba. 



Bathymetrical range. From 338 to 484 meters. 



CARYOMETRA MONILICIRRA A. H. Clark 



Caryometra monilicirra A. H. CLARK, Mem. Soc. Cubana Hist. Nat., vol. 14, No. 2, 1940, p. 143 (in 

 key), p. 144 (description; Atlantis station 3435), pi. 21, fig. 1; text figs. 1, 2, p. 147.- H. L. CLARK, 

 Mem. Soc. Cubana Hist. Nat., vol. 15, No. 1, 1941, p. 12 (Atlantis station 3435; notes). A. H. 

 CLARK, Bull. U.S. Fish. Comm., vol. 55, 1954, p. 374 (listed). 



Diagnostic features. The cirri are short, strongly curved in the distal half, with 19 

 to 24 (usually 20) segments, of which the longest proximal are five or six times as long 

 as the median width and the distal are about as long as broad, arranged in 10 columns on 

 the centrodorsal ; the arms are 30 mm. long in the holotype; the brachials have prom- 

 inently everted and spinous distal ends; PI is 4 mm. long, with 13 segments; P 2 is 3 mm. 

 long, with 12 segments. 



Description. The centrodorsal is rounded conical with slightly convex sides, 1.2 

 mm. broad at the base and about the same distance from the apex to the rim. The 



