A MONOGRAPH OF THE EXISTING CRINOIDS 495 



The color in alcohol is usually dull yellow, green, or white, with a broad light or 

 dark reddish or yellowish brown line running outward from the angles of the centro- 

 dorsal and continued as a broad lateral line along the division series and arms. 

 Some specimens are entirely dark yellowish, reddish or blackish brown, or light 

 or dark green, or brown finely marbled ventrally with green, the two colors in 

 about equal proportions, or yellow. 



Notes. The specimen from Sebesi Strait has 57 arms 165 mm. long. Of the 

 10 IIBr series, 8 are 4 (3 + 4) and 2 are 2. Of the 20 IIIBr series, 17 are 2 and 3 

 are 4 (3 + 4). The following division series are all 4 (3+4). The centrodorsal is 

 very small, pentagonal with slightly produced angles, and is slightly sunken below 

 the dorsal surface of the radial pentagon. 



Professor Koehler's 4 specimens from Billiton were of large size. In 2 of these 

 the centrodorsal is simply pentagonal and not so markedly stellate as in the others. 

 In one of the specimens the second syzygy is at about the seventeenth or eighteenth 

 brachial, while in the others it is found at about the twelfth. 



The specimen from Siboga station 33 has about 95 arms which are about 100 mm. 

 long. The color in alcohol is a uniform yellow brown. 



The largest individual from Siboga station 50 has about 120 arms which are 

 about 110 mm. long. One of the IIBr series is 2. The IIIBr series on the 5 rays are 

 as follows: (1) 4 of 2; (2) 1 of 2 and 3 of 4 (3+4); (3) 4 of 2; (4) 4 of 4 (3 + 4), 2 of 

 these being on the IIBr 2 series; (5) 1 of 4 (3 + 4) and 3 of 2. The centrodorsal is 

 very small. 



A similar example has all the IIBr series 4 (3+4). Of the IIIBr series, 13 are 

 2 and 7 are 4 (3 + 4); usually the IIIBr 4 (3 + 4) series occur in pairs on the same 

 IIBr series. The centrodorsal is very small and stellate. 



In another large specimen all of the IIBr series are 4 (3 + 4). One of the IIIBr 

 series is 4 (3 + 4), all of the others being 2. The centrodorsal is very small and stel- 

 late, sunk well below the dorsal surface of the radials. 



The fourth specimen has 37 arms 65 mm. long and V cirri. 



Of the examples from Siboga station 299, one is a magnificent representative of 

 the species with about 80 arms 155 mm. long. The IIIBr series are all 2, all of the 

 other division series being 4 (3 + 4). The other is a slightly smaller individual. Both 

 have exceedingly reduced stellate centrodorsals. 



The specimen from Siboga station 60 is a medium-sized but robust and well- 

 developed individual with about 100 arms which are 110 mm. in length. The cen- 

 trodorsal is small and pentalobate. 



One of the examples from Siboga station 282 is typical, with about 100 arms. 

 The other is small, with 26 arms about 70 mm. long, undergoing adolescent autotomy. 

 The arms on the several rays are 2,1 + 6,3 + 5,2, and 6 + 1. The cirri are XVI, 12-13 

 (usually the latter), 8 mm. long. 



The example from Siboga station 125 has about 80 arms which are about 100 mm. 

 long. Only 7 of the IIIBr series are 2. Adolescent autotomy is in progress. The 

 centrodorsal is irregularly polygonal, though sunk below the level of the dorsal 

 surface of the radial ring. The color in alcohol is dark brown, the radials darker, 

 the centrodorsal nearly white. 



