A MONOGRAPH OF THE EXISTING CRINOIDS 449 



Syzygies occur between brachials 1+2 and 9 + 10 or 10 + 11, and distally at 

 intervals of 3 or 4 muscular articulations. 



The pinnules decrease in length from P D to those of the fourth and fifth brachials, 

 and then increase again. The first 8 or 9 pinnules on each side bear a terminal comb 

 which may occur at intervals as far as the thirtieth brachial. 



The disk is 11 mm. in diameter. It bears a few calcareous nodules. The mouth 

 is interradial, and the anal tube is almost marginal. 



The color in alcohol is brownish white with dark spots on the mediodorsal line 

 of the division series and first brachials, and in addition lateral spots on the outer 

 elements of the IBr and proximal elements of the IIBr series. 



The preceding description is based upon Carpenter's original description of the 

 type specimen. 



Notes. The 2 specimens from Siboga station 65a are small and much broken. 



The largest specimen from Siboga station 305 has about 30 arms which are about 

 75 mm. long. The dorsal pole of the centrodorsal is flat, 2 mm. in diameter. The 

 cirri are XXI, 12-13, 10 mm. long. Another has 30 arms 70 mm. long. The cirri 

 have 9-10 segments, and are 8 mm. long. One of the cirri is curiously modified, as 

 described below. The 6 additional specimens are all small. 



The 3 specimens from Siboga station 289 are all small. One has 16 arms 35 mm. 

 long. There are 3 IIBr 4 (3 + 4) series, each bearing a IIIBr 2 series internally. 

 Another has 12 arms 25 mm. long. There is a single IIBr 4 (3 + 4) series bearing a 

 IIIBr 2 series internally developed. The third has 10 arms 25 mm. long. 



Of the 5 specimens from Siboga station 294, the largest has 15 arms 30 nun. long. 

 There are 2 IIBr 4 (3 + 4) series, 1 bearing internally a IIIBr 2 series, the other bearing 

 2 IIIBr 2 series. Another has 12 arms 25 mm. long. There is a single IIBr 4 (3 + 4) 

 series which bears internally a IIIBr 2 series. A third has 10 arms 25 mm. long. The 

 remaining 2 have each 10 arms 15 mm. long. 



The largest specimen from Siboga station 144 has 21 arms. One ray bears only 

 2, with the other 4 regenerating. There are 11 cirrus segments. The other 2 each 

 have 10 arms 22 mm. long. 



The example from Siboga station 153 has about 34 arms 110 mm. long. 



Of the 3 specimens from Siboga station 260, 1 is large, 1 is small, and 1 is very 

 small with only 10 arms. 



Of the 4 specimens from the Danish expedition to the Kei Islands station 24, 



1 has 24 very slender arms 65 mm. long, 1 has 23 arms 60 mm. long, and the other 



2 are small. 



The specimen from the Danish Kei Islands expedition station 58 is small and 



broken. 



The specimen from Albatross station 5356 has 30 arms 80 mm. long. The cirri 



are VIII, 10. 



The specimen from Albatross station 5414 has 30 arms 80 mm. long. The cirri 

 are XV, 11, from 7 to 8 mm. long. 



Of the 2 examples from Albatross station 5477, 1 has 31 arms 100 mm. long, and 

 the cirri XI, 11-12. The other is small with 20 arms 85 mm. long. 



Of the 3 specimens from Albatross station 5401, 1 has 33 arms about 75 mm. 

 long, and the cirri XXIII, 11. The other 2 are immature. 

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