A MONOGRAPH OF THE EXISTING CRINOIDS 261 



almost single row. The second and third segments are the longest, three and a half 

 times the median width. The fourth segment is three times the median width. 



The 10 arms are all broken. The distal edge of the brachials is finely spinous, 

 "besides, here and there, small, not calcified processes giving the arms a slightly 

 fluffy appearance." 



PI to P 3 are provided with combs. Pj is 4.5 mm. long with 22-24 segments, 8 

 of which bear teeth of large size. P 4 is about 3 mm. long, composed of 12 segments, 

 without a comb, and bearing the first gonad. The pinnule segments are expanded 

 at the ends and spiny. The disk is 3 mm. in diameter. The mouth is central. 



In the specimen from Mortensen's station 8 the centrodorsal is 1.7 mm. in diam- 

 eter. The cirri are XXVI, 9-11, about 3 mm. long, arranged in a partly double row. 

 The 10 arms are all broken. The spinosity is rather poorly developed. P : bears a 

 comb composed of 8-10 teeth. P 4 is without a comb. The disk is 2.5 mm. in 

 diameter. The mouth is central. 



In one of the 3 specimens from Mortensen's station 9 the centrodorsal is 2.5 mm. 

 in diameter. The cirri are about XXV, 10-12, from 5 to 6 mm. in length. The 

 second cirrus segment is from half again to twice as long as the me'dian width. The 

 third is three times as long as broad. The 10 arms are all broken. P! to P 3 bear 

 combs. P 4 bears a large gonad. The pinnule bases are slightly notched and spinous. 

 This individual is smoother than that from Mortensen's station 7, but distinctly 

 more spiny than C. parvula. 



A second specimen from Mortensen's station 9 has the centrodorsal 2.2 mm. in 

 diameter. The cirri are about XX, 11-12, 6 mm. long. The 10 arms are probably 

 about 40 mm. long. P, to P 3 bear combs. 



The third specimen from Mortensen's station 9 has the cirri about XXII, 12, 

 7.2 mm. long. Pj to P 3 bear combs. 



Localities. Dr. Sixten Bock's station 8; off the Goto Islands, Korean Straits; 

 210 meters; temperature 13.7 C.; April 14, 1914 [Gislen, 1922, 1927]. 



Dr. Th. Mortensen's station 8; southwest of the Goto Islands (lat. 32 49' N., 

 long. 128 14' E.); 210 meters; sand; May 14, 1914 [Gislen, 1927]. 



Dr. Th. Mortensen's station 7; southwest of the Goto Islands (lat. 32 17' N., 

 long. 128 11' E.); 201 meters; sand; May 14, 1914 [Gisle"n, 1927]. 



Dr. Th. Mortensen's station 9; southwest of the Goto Islands (lat. 32 15' N., 

 long. 128 12' E.); 164 meters; hard bottom; May 15, 1914 [Gisl4n, 1927]. 



Siboga station 305; Solor Strait, east of Flores; mid-channel, off Kampong 

 Menanga; 113 meters; stony bottom; February 8, 1900 [A. H. Clark, 1912, 1918] (2, 

 U.S.N.M., E. 411; Amsterdam Mus.). PI. 27, figs. 73, 74. 



Geographical range. From the Korean Straits southward to the Lesser Sunda 

 Islands. 



Bathymetrical range. From 113 to 210 meters; the average of 5 records is 179 

 meters. 



Thermal range. One record, 13.7 C. 



Remarks. Gislen says that evidently this species is very closely related to C. 

 hispida as well as to C. parvula. From the former the specimens which he was able 

 to examine differ by having combs only on PI to P 3 , C. hispida having combs on PI 



