A MONOGRAPH OF THE EXISTING CRINOIDS 525 



what everted and bordered with spines. The genital pinnules are 7 mm. long. The 

 distal pinnules are 9 mm. long, with 20-25 segments; there are dorsal hooks on the 

 last 9-12 segments. In the posterior arms the pinnules beyond that on the IVBr 

 series are swollen with genital products. 



The disk is 25 mm. in diameter, smooth, without calcareous granules or papillae. 

 The anal funnel is central, short, and verruciform, 4 mm. high. 



The color, in alcohol is yellow brown, the cirri whitish with brown transverse 

 bands. 



In the specimen from Bock's station 59 the cirri are XXIV, 11-15, the longest 

 10 mm. in length. The third segment is half again as long as broad. The fourth 

 and fifth segments are twice as long as broad. The sixth or seventh is a transition 

 segment. The dorsal spines are very indistinct. The opposing spine is one-quarter 

 the width of the segment which bears it. 



The radials are almost entirely concealed by the centrodorsal. The IBi'i are 

 three times as broad as long, almost wholly free laterally. The IBr 2 (axillaries) are 

 twice as broad as long, their lateral edges making an obtuse angle with those of the 

 IBri. The IIBr series are 4 (3 + 4), the IIBi'i being united ulteriorly. The single 

 internal IIIBr series is 4. 



The 21 arms are 55 mm. long. The distal brachials are half again as long as 

 broad, narrow, almost smooth, though overlapping distally. 



The arrangement of the syzygies is as in the succeeding specimen. 



P D has about 30 segments, of which the terminal 7-8 bear teeth. P, is 7 mm. or 

 less in length with about 30 segments, of which the last 7 bear teeth. P 2 is 4 mm. 

 long with 21 segments, of which the last 7 bear teeth. P 3 is 3.7 mm. long with 18 

 segments and a comb of 5 teeth. P 6 is 4.5 mm. long with 21 segments and a comb 

 of 6 teeth. There are spiny processes on the proximal pinnule segments. Combs 

 with 5-6 teeth occur at intervals at least to the thirteenth pinnule. The distal 

 pinnules are 5.5 mm. long with 16-17 segments, of which the last 2 bear dorsal hooks. 



The disk is 7.5 mm. in diameter and papillose. The mouth is marginal and the 

 anus central. 



In the specimen from Bock's station 60 the centrodorsal is 4 mm. in diameter, 

 with the free dorsal pole 1.5 mm. in diameter. 



The cirri are XXII, 20-30, from 13 to 26 mm. in length, arranged in 2 rows on the 

 centrodorsal. The shorter dorsal cirri have 20-21 segments, and the longer ventral 

 26-30. The fourth segment is a little longer than broad, the fifth-seventh or -eighth 

 are half again as long as broad, and those succeeding become shorter again. From the 

 seventh or eighth onward the segments have a polished surface and dorsally transverse 

 crests with small spines. The opposing spine reaches in height one-quarter the width 

 of the segment that bears it. 



The radials are visible in the interradial angles. The IBri are three times as 

 broad as long and are laterally free. The IBr 2 (axillaries) are pentagonal, twice as 

 broad as long; their lateral margins form an obtuse angle with those of the IBr,. 

 The IIBr series are 4 (3 + 4). The IIIBr series, present in 4 cases, are 2. The distal 

 borders of the IBr axillary bear small spines, as does the following ossicle, but for 

 the rest the arm bases are rather smooth. 



