A MONOGRAPH OF THE EXISTING CRINOIDS 



33 



specimen has the appearance of C. unicornis, but it approaches C. bella and its variety 

 brunnca in having a tolerably high number of cirrus segments. It seemed to him 

 doubtful whether C. unicornis could be kept separate from C. bella. 



The specimen from Port Galera, Mindoro, has 30 arms about 100 mm. long. The 

 cirri have 42-44 segments and are from 25 to 27 mm. long. P 2 is 14 mm. long, rather 

 slender, with 19-21 segments of which the fourth and following are as long as broad 

 or very slightly longer than broad. 



The specimen from Albatross station 5401 has 23 arms 120 mm. long. The cirri 

 have 36-39 segments. 



The specimen from Albatross station 5248 was described as the type of a new 

 species, Cenometra delicata, in the following terms: The centrodorsal is discoidal 

 with the polar area slightly concave. The cirrus sockets are marginal, arranged in 

 two closely crowded alternating rows. 



The cirri are XIX, 31-33, 20 mm. long, and comparatively slender. The first 

 segment is short, and the remainder are subequal and about twice as broad as long. 

 The segments are somewhat flattened dorsally, after the tenth bearing very small 

 blunt paired median dorsal tubercles. The opposing spine is triangular, arising from 

 the entire dorsal surface of the penultimate segment, blunt, with the apex median in 

 position. The terminal claw is about as long as the penultimate segment and is rather 

 stout and strongly curved. 



The ends of the basal rays are visible as flattened tubercles in the interradial 

 angles of the calyx, but are difficult to differentiate from the centrodorsal. 



The radials are visible, but short; their anterolateral angles are slightly divergent. 

 The IBi-j are trapezoidal, decreasing slightly in width distally, proximally about two 

 and one-half times as broad as long. The IBr 2 (axillaries) are broadly pentagonal, 

 about twice as broad as long, with the lateral edges about as long as those of the IBr^ 

 The IIBr, IIIBr, and IVBr series are 2, the last only occurring on the outermost side 

 of the postradial series. All the ossicles up to and including the second brachials 

 have prominent ventrolateral processes the outer edges of which form a line parallel 

 to the longitudinal axis of the ossicles that bear them. 



The 35 arms are 85 mm. long, and are more slender than the arms of the other 

 species in the genus. The brachials resemble those of C. unicornis, but are pro- 

 portionately slightly longer. 



The pinnules in general resemble those of C. unicornis, but P 2 is much more 

 slender, 9 mm. long with 16-17 segments of which the first is nearly twice as broad as 

 long, the third is about as long as broad, and those succeeding gradually become about 

 one-third again as long as broad. The distal dorsal edge of the segments from the 

 fourth onward is strongly produced, standing out in the form of a coarsely spinous 

 crescentic ridge. 



The color is deep violet, with the cirri, P 2 , and the dorsal side of the other pinnules 

 bright yellow. 



The specimen from Albatross station 5249 is similar to the one just described. 

 It has 34 arms. The color is entirely deep violet. 



The specimen from Ternate is a fine example of the species with 29 arms 140 

 mm. long. 



In the specimen from the Danish Expedition to the Kei Islands station 37 the 





