A MONOGRAPH OF THE EXISTING CRINOIDS 103 



A specimen from Samoa in the Copenhagen Museum has 27 arms 100 mm. long 

 and the cirri XXVII, 20-22, from 15 to 20 mm. in length; the transition segment is 

 about the tenth. The brachials in the distal half of the arm are exceedingly short, 

 almost discoidal. Eggs are developed on the pinnules. 



Of the examples from Siboga station 96, the largest has 43 arms 100 mm. long, 

 and the cirri from 22 to 26 mm. long with 23-25 segments; the dorsal pole of the 

 centrodorsal is very slightly concave, 3.5 mm. in diameter. Another has 43 arms 

 about 85 mm. long, and the cirri from 20 to 22 mm. long with 24-26 segments, of 

 which the eleventh, twelfth, or thirteenth is a transition segment. A third is similar 

 to the preceding with 35 arms 95 mm. long and the cirri from 20 to 23 mm. long. 

 A fourth has 33 arms 95 mm. long and cirri XX, 22-24, from 28 to 29 mm. long; 

 the ninth or tenth is a transition segment. A fifth has 29 arms 80 mm. long; on the 

 several rays the arms are 8 (4 + 4), 4 (1 + 3), 7 (4 + 3), 8 (3 + 5), and 2; the anal area 

 of the disk is studded with scattered large rounded conical concretions. The remain- 

 ing specimen is young, with 12 arms 40 mm. long. 



Of the two specimens from off Jolo, one is rather large and stout, approaching 

 C. nigra. There are 38 arms 130 mm. long. The cirri have 24-27 segments. The 

 other is smaller and less stout with about 35 arms 105 mm. long. The cirri have 19-23 

 segments. 



The specimen from Port Galera, Mindoro, has 21 arms. 



The specimen from the Philippines collected by Prof. J. B. Steere is small and 

 mutilated ; it has between 40 and 50 arms. 



The example from Macclesfield Bank without further data has 26 arms; the cirri 

 are X, 18. That from 24 meters has 20 arms and its cirri have 18 segments. One 

 of the 2 from 24-66 meters has 20 arms 80 mm. long; the cirri are XXII, 18-20 

 (usually the latter), 18 mm. long; the centrodorsal has a broad flat dorsal pole 5 mm. 

 in diameter. 



The specimen from Parry's shoal in 22 meters has 21 arms 90 mm. long; the cirri 

 are XXV, 17-20 (usually the latter), from 15 to 18 mm. in length. This is very like 

 the individual from the Macclesfield in 24 meters, but the whole animal is a trifle 

 stouter. 



The example possibly from the Chinese coast was simply labeled in Chinese 

 characters "very deep water." This is the only indication of its origin. The centro- 

 dorsal is thick discoidal with a flat dorsal pole 4.5 mm. in diameter; the cirri are 

 XVIII, 20-21, 20 mm. long. There are 38 arms about 80 mm. long; the distal edges 

 of the brachials are produced and finely spinous, and the distal ends of the elements 

 of the division series are prominent, these 2 features together giving the animal a 

 very rugose appearance. 



One of the specimens from Doctor Bock's station 59 in the Benin Islands has the 

 centrodorsal 3.7 mm. in diameter, the bare dorsal pole being 2 mm. in diameter. 

 The cirri are XXVIII, 20-24, from 15 to 20 mm. long, arranged in 2 rows. In the 

 cirri the first 2 segments are broader than long. The third is somewhat longer, 

 slightly constricted centrally, and the fourth-sixth are half again as long as broad. 

 The seventh is a transition segment, and the surface of the eighth and following is 

 highly polished. From the seventh onward a small dorsal spine is developed, which 



