A MONOGRAPH OF THE EXISTING CRINOIDS 651 



The disk has been thrown off and is partially regenerated. It is 11 nun. in 

 diameter. Four of the arms have the ambulacral groove rudimentary. 



The 2 specimens from Mortensen's station 2 were also referred by Gisldn to 

 Comanthus panicirra y vaniipinna. In one of these the cirri are XX, 12-14, 7 mm. 

 long. The 33 arms are from 35 to 45 mm. in length. The IIBr and IIIBr series are 

 4 (3 + 4). Pd is 1 1 mm. long. The pinnules as far as P3 or I^ have combs consisting 

 of a double row of 6-8 teeth. Sometimes a single pinnules in this series will be 

 without a comb. The disk is 17 mm. in diameter. The anal tube is central, 3.5 mm. 

 in height. The mouth is in the right anterior interradius. 



In the other specimen from Mortensen's station 2 the cirri are XIX, 15-17, 

 from 8 to 9 mm. long. The 22 arms are from 50 to 85 mm. in length. Of the 10 

 IIBr series, 8 are 4 (3 + 4) and 2 are 2. The 2 IIIBr series are 4 (3 + 4). The pinnules 

 as far as P4 bear combs, but P3 is often combless. The combs are composed of 8-11 

 teeth in 2 rows. The disk has been thrown off, but was about 13 mm. in diameter. 



The specimen from Mortensen's station 4, referred by Gisl^n to Comanthus 

 parvicirra 7 vaniipinna, has the cirri XIV, 12-15, 7 mm. long. The 19 arms are from 

 25 to 30 mm. in length. Pd, Pi, and P2 bear combs and in some cases also P4. The 

 disk is 5 mm. in diameter. The anal tube is central, 2 mm. high. The mouth is 

 interradial. Two of the arms are without ambulacral furrows. 



The 2 specimens from Mortensen's station 23 were also referred by Gisl6n to 

 Comanthus parvicirra y vaniipinna. One is represented merely by some detached 

 postradial series. The IIBr and IIIBr series are 4 (3+4). The arms are about 

 40 mm. long. The combs are of the usual type, with the usual distribution. 



In the other the cirri have 13 segments and are 5 mm. long. The 13 arms are 

 about 25 mm. long. Two of the division series are developed to the right and one to 

 the left. Pi and P2 bear combs. The disk is 7.5 mm. in diameter. The anal tube is 

 central. 



The 3 specimens from Mortensen's station 20 were referred by Gisl6n to Coman- 

 thus parvicirra a comasteripinna. 



In one of these the cirri have 11-13 segments and are 6.5 mm. in length. The 

 arms are 21+ (probably 23) in number, from 35 to 60 nmi. long. Of the 9 IIBr 

 series present 8 are 4 (3 + 4) and 1 is 2. Of the 2 III Br series, 1 is 4 (3 + 4) and 1 is 2. 

 Pinnules occur with combs at varying intervals as far as the twelfth. The disk is 

 9 mm. in diameter. The anus is central. Five or six arms are without ambulacral 

 furrows, and on 7 more arms the pinnules of the proximal half are groovelcss. 



In another specimen 2 of the cirri are 6 mm. long with 12-13 segments, the 

 remaining cirri being rudimentary. The 17+ (probably 20) arms are about 40 mm. 

 long. The IIBr series are 4 (3+4). Combs occur here and there as far as the fifteenth 

 pinnule. The disk is 6.5 mm. in diameter. 



In the third specimen the cirri are XII, all broken. The diameter of the centro- 

 dorsal is 1 .2 mm. The 13 arms are about 20 mm. long. The IIBr series are 4 (3 + 4), 

 developed to the right. 



Of the 5 specimens from Amoy in the Berlin Museum 1 has 15 arms about 80 

 mm. long; 3 have 12 arms, 95, 90, and 45 mm. long, respectively; and the fifth has 

 10 arms 35 mm. long. 



