A MONOGRAPH OF THE EXISTING CRINOIDS 517 







Notes. Suensson's specimen from eastern Asia has 36 arms which are 125 mm. 

 long. The IIBr series are all 4 (3 + 4). Of the IIIBr series, 8 are 2 and 2 are 4 (3 + 4). 

 The cirri are composed of 25-26 segments and are from 20 to 25 mm. long. 



Schonau's specimen from off the Goto Islands is a young example just attaining 

 the multibrachiate condition. There are 7 IIBr series present, all 4 (3 + 4), and there 

 is one IIIBr series of 2. 



Doflein's specimen from Aburatsubo is larger than the type, but otherwise re- 

 sembles it in every particular. The dorsal pole of the thick discoidal centrodorsal 

 is concave, 4 mm. in diameter. The cirri are stout, with 29-31 segments, and are 35 

 mm. long. The division series are narrow, strongly convex, and well separated. 

 The IIBr series are all 4 (3 + 4). The IIIBr scries are all 2. The distal edges of the 

 ossicles of the division series and of the brachials are strongly everted. The 33 arms 

 are 150 mm. long. 



The specimen from Bock's station 51A has the centrodorsal 12 mm. in diameter 

 at the base, 9 mm. across the bare dorsal pole, and 3 mm. high. 



The cirri are U, 28-33, form 27 to 35 mm. in length, and are arranged in 2 or 3 

 rows. The first segment is twice as broad as long, the second-eleventh are about 

 as long as broad, a little wider at the ends than in the middle, and the twelfth-four- 

 teenth are somewhat longer than broad. There is a transition segment at about the 

 twentieth. The dorsal spines are weak, but rather distinct. The spines on the dis- 

 tal segments are pointed. The terminal claw is curved, and is half again as long as 

 the penultimate segment. 



The IBr 2 (axillary) is twice as broad as long, with the distal angle acute. The 

 IIBr series are 4 (3 + 4). The 20 IIIBr series are 2. The 24 IVBr series are 4 (3 + 4). 

 The IIBri are almost entirely free interiorly. 



The 64 arms are from 140 to 190 mm. in length and are dimorphic. The width 

 of the brachials 50 mm. from the base of the arms is 1.8 mm., and distally it is 0.6 mm. 

 There are 19-23 brachials for each 10 mm., or 15-17 if the syzygial pairs are counted 

 as units. The brachials are "very swollen, thick, and coarse." 



The second syzygy is from between brachials 22 + 23 to between brachials 24 + 25, 

 and the third is from between brachials 28 + 29 to between brachials 30 + 31. The 

 distal intersyzygial interval is 4 (to 5) muscular articulations. 



P D is from 30 to 33 mm. in length and is composed of 75-80 segments. It has a 

 very indistinct comb of about 12 teeth which is partly hidden by perisome. The tip 

 of the pinnule is smooth. The pinnule on the IVBr series is similar to P D and, like 

 it, has a comb composed of 12 teeth. PI is about 23 mm. long and has a comb com- 

 posed of 18 teeth which are more strongly developed than those of the combs of the 

 pinnules preceding. P 2 is 16 mm. long, with about 40 segments. Its comb is com- 

 posed of 6 teeth. The tip of the pinnule is smooth. P 3 is shorter; its comb is 

 composed of some few small teeth. P 4 is 6 mm. long, with about 25 segments, and 

 bears no comb. The genital pinnules are 12 mm. long. The distal pinnules are 14 

 mm. long, with about 30 segments, which are half again as long as broad. The dorsal 

 hooks are indistinct. 



The disk is 38 mm. in diameter. The color as preserved is reddish yellow. 



