490 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



division series are rounded dorsally and laterally and widely separated, except for the 

 first segments following each axillary, which are interiorly united for nearly the whole 

 length. The division series may be somewhat variable; though series of 4 (3+4) and 

 2 are in equal proportions when taken as a whole, they do not necessarily alternate with 

 each other. The tendency is, however, to an alternating arrangement. 



The arms are 80-160 in number, from 90 to 125 mm. long, and resemble those of 

 C. polycnemis. 



The disk and the pinnules seem not to differ from those of C. polycnemis. 

 The color in alcohol is yellow or blackish brown. 



Notes. The specimen from Amboina as described by Reichensperger is typical. 

 The centrodorsal is stellate. There are no cirri. There are 96 arms which are from 

 100 to 110mm. long. All of the IIBr series are 4 (3 + 4). All of the IIIBr series are 2. 

 The IVBr series are all 4 (3+4). The VBr series are 2. The VIBr series are 4 (3 + 4). 

 There is no further division. The disk bears isolated tubercles. The mouth is radial. 

 The color in alcohol is dark brown. 



The type specimen in the Leyden Museum, which is without indication of locality, 

 was thus described by Carpenter. 



The centrodorsal is a pentagonal disk slightly hollowed in the center, with its 

 angles produced into 5 blunt processes which are separated from the radials by the 

 outer ends of the basal rays. 



There are no cirri nor any distinct traces of functional cirrus sockets. 

 The radials are short, below the level of the centrodorsal, but not separated from 

 it by distinct clefts. The IBri are much longer and broader, broadly hexagonal, 

 and partly united laterally. The IBr 2 (axillaries) are barely half as long again as 

 the IBri and are almost triangular, with very open angles. The division series are 

 quite free from the IBr axillary onward, and may divide five, or rarely six, times. 

 The successive division series are alternately 4 (3+4) and 2. The first ossicles fol- 

 lowing each axillary are quite free, or but slightly united laterally. 



There are numerous arms about 125 mm. long which consist of 150+ brachials. 

 The first 2 brachials are about equal in length and are nearly oblong. The first 

 syzygial pair (composed of brachials 3 + 4) is longer, with its distal edge sloping 

 obliquely inward so that the outer side is the longer. The next few brachials are 

 shorter and bluntly wedge-shaped, and those following are longer again, more sharply 

 wedge-shaped and overlapping, with slight spines on their distal edges. The overlap 

 is sometimes so marked that the brachials seem to have a sharp dorsal keel with spiny 

 edges. After about the thirtieth the brachials become shorter, blunter, and more 

 oblong, and squarer and less strongly overlapping toward the arm tips. 



Syzygies occur between brachials 3+4, again from between brachials 13 + 14 

 to between brachials 18 + 19, and distally at intervals of 4 or 5 muscular articulations. 

 The IIBr 2 and IVBr 2 bear slender pinnules of moderate length, of which the 

 first is slightly the longer. Pj is a good deal shorter, and P 2 still more so. The next 

 6 or 8 pinnules are a little longer, consisting of 15 more massive segments, the lower 

 of which are trapezoidal, with their outer distal angles produced into short processes. 

 The pinnules following become gradually longer and more slender and are composed 

 of longer segments, still retaining processes on their outer sides and fringed with small 



