32 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



One of the specimens from Albatross station 2165 is medium sized with 30 arms 

 and very spiny. Another is similar but has about 20 arms, IIIBr series being present 

 on one ray. 



The specimen from Albatross station 2169 is similar to that from station 2354. 



The specimen from Albatross station 2337 is medium sized or rather small with 

 the arms 75 mm. long and the cirri X, 40 mm. long. The dorsal spines on the brachials 

 are remarkably developed. 



Two specimens from Albatross station 2342 are of medium size; one has 25 arms 

 and cirri with 45-50 segments, the other has 30 arms and cirri with 35-40 segments. 



Three small specimens from Albatross station 2346 are probably immature; the 

 arms are 55 mm. long with well developed brachial spines and the cirri are 26 mm. long 

 with 40-45 segments. 



A specimen from Albatross station 2345 is of average development; the arms are 

 90 mm. long with strongly developed brachial spines and the cirri are XIV, 40. 



The specimens from Albatross station 2349 are rather small. 



From Albatross station 2336 comes a very large specimen with 30 arms 140 mm. 

 long; the long dorsal spines are rather poorly developed and die away before the middle 

 of the arms is reached. The cirri are 50 mm. long with 65-80 segments, none of which 

 are longer than broad; the longer proximal segments, which are almost as long as broad, 

 are characteristically constricted centrally. The color is rather dark brown. 



Dr. Clemens Hartlaub gave a general account of 21 specimens from Blake stations 

 155, 220, 231, 232, 249, 259, 269, 290, 292, 297, 298, and 299. The largest number of 

 specimens came from the stations off St. Vincent. He called attention to the uniformity 

 of the bottom conditions on which this species occurs rocks, coarse sand, coarse sand 

 and rocks, coarse coral sand and broken shells, calcareous stones, broken shells and 

 coral, and coral and coralline. He gave the following summary of the characters of 

 the species: The centrodorsal is thick, short-columnar, dorsally sometimes rounded, 

 sometimes more flattened, with a large bare dorsal pole which has a rough surface 

 showing small sharp spines and traces of five interradial ridges, which become stronger 

 on the sides of the centrodorsal, where they separate the five radial pairs of cirrus sockets 

 from each other. The cirrus sockets are arranged in 10 columns of 3 or 4 each, though 

 the cirri present in each column are never more than 2. 



The cirri are about XV, with up to 70 segments, and reach 40 mm. in length. 

 They are long with the segments in the proximal half, except for the basal, elongated, 

 and those in the distal half short. The very uniform short segments ha the distal 

 half of the cirri bear the usual spines, their dorsal profile being prominently crenulate. 



The radials are visible. The IBr: are about as long as the IBr 2 and are not incised. 

 The IBr 2 (axillaries) are approximately rhombic and rather short. The IIBr and 

 IIIBr series are 2. As a rule IIIBr series are developed on the inner branch from each 

 IIBr series so that each postradiai series bears 6 arms arranged in 1, 2, 2, 1 order. 

 Occasionally IVBr 2 series are developed. 



The ossicles from the IBri onward are laterally free. There is an exception to this, 

 however, in a specimen from Blake station 249 (Grenada) in which the IBri are in lateral 

 contact by their lateral edges which, however, are not flattened laterally. Slight 

 synarthrial tubercles are present. The elements of the division series have the outer 

 surface concave. There is never any trace of lateral flattening. On all the ossicles of 



