A MONOGRAPH OF THE EXISTING CRINOIDS 471 



10 IIBr series 9 are 4 (3 + 4) and 1 is 2. The IIIBr series are 2 externally and 4 (3 + 4) 

 internally except on a single postradial series where all 4 IIIBr series are 4 (3 + 4) ; 

 it is this ray that bears a IIBr 2 series. The IIBr series are very broad and are but 

 slightly convex dorsally; they are almost in contact laterally, the narrow intervening 

 spaces being heavily plated. The centrodorsal is pentagonal with the corners slightly 

 produced, and is slightly raised above the surface of the radial ring. There are a 

 few small pits in the interradial areas of the margin. 



The specimen from Batavia Bay has about 70 arms which are 85 mm. long. 

 The division series are comparatively narrow and well separated dorsally. The 

 dorsal interradial perisome is heavily plated. The cirri are XIV, 14-16, from 10 to 12 

 mm. long, with others more or less rudimentary. The color in alcohol is slaty gray. 



Both of the specimens from Siboga station 33 are large and typical of the species. 

 In one the centrodorsal is regularly pentagonal, though as yet it has not quite sunken 

 to the level of the radial pentagon. The IIBr series on the 2 posterior rays arc 2, 

 and on the other 3 rays 4 (3 + 4). On 1 of the 2 posterior rays the IIIBr series are 

 4 (3 + 4) 2 4 (3 + 4) 4 (3 + 4), and on the other they are all 4 (3 + 4). On 1 

 of the other rays 1 of the external IIIBr series is 2, the other 3 IIIBr series being 4 

 (3 + 4). On the other 2 rays the IIIBr series are typical. The division series are 

 very broad, and are almost or quite in lateral apposition. Wherever it is exposed the 

 dorsal interradial perisome is heavily plated. The 3 anterior rays are dark brown 

 with small blotches of yellowish. The 2 posterior rays and the bases of the arms 

 which they bear are yellowish white, but the outer part of these arms is dark brown 

 like those on the anterior rays with more or less light yellow in the median line. The 

 other specimen is typical. 



The specimen from Siboga station 303 is a magnificent fully grown example, but 

 its centrodorsal bears VIII more or less rudimentary cirri. 



The example from Siboga station 99 is large with about 120 arms which are about 

 130 mm. long. The centrodorsal is small and pentagonal, sunk to the level of the 

 radial circlet. 



The larger individual from Siboga station 220 has 70 arms 120 mm. long. The 

 centrodorsal is very thin, discoidal, with the flat dorsal pole 3.5 mm. in diameter. 

 The cirri are XIV, 14-15, 10 mm. long. The color is whitish, the division series 

 heavily blotched with dark gray; the distal portion of the arms is dark gray, and the 

 outer part of the pinnules is brown. 



In the smaller example from Siboga station 220 there are 62 arms 95 mm. long. 

 It closely resembles the specimen from Batavia Bay. There is usually one more 

 division series on the outermost branch of the IIIBr series than elsewhere. The 

 arms are less developed and more slender than in the preceding, and the division series 

 are less broad. The centrodorsal is thin discoidal, with the bare dorsal pole 3 mm. 

 in diameter. The cirri are XI, 14-15, from 10 to 12 mm. long, with in addition some 

 which are more or less rudimentary. 



In the specimen from the ?East Indies, which is the type of Adinometra schlegelii, 

 as described by Carpenter, the centrodorsal is a thin circular disk hollowed in the 

 center and bearing about 20 marginal cirrus sockets. 



The cirri are lost. 



