A MONOGRAPH OF THE EXISTING CRINOIDS 63 



PI is 7 mm. long with 14 segments of which the first is very short, the third is 

 slightly broader than long, the fourth is slightly longer than broad, and the last three 

 or four are about twice as long as broad. The distal angles of the segments project 

 considerably beyond the somewhat narrowed bases of the segments succeeding, giving 

 the profile of the pinnule a strongly serrate ch:ir:irtiT. Though stouter, as well as 

 longer, than the following pinnules, P, is not appreciably enlarged. 



P 2 is 5 mm. long with 10 segments, resembling P, but proportionately more slender. 

 P 3 is 4 mm. long with 9 segments, and resembles P 2 . P 4 is 3 mm. long with 8 segments. 

 P 5 is similar to P 4 . The pinnules succeeding slowly increase in length, reaching a 

 length of 7.5 mm. distally. 



Notes. A young specimen taken with the one described has 14 arms 85 mm. long. 



Locality. Dr. Th. Mortensen's Pacific expedition, 1914-191G; 25 miles east by 

 south from Zamboanga, Mindanao, Philippine Islands; 292-365 meters; hard bottom; 

 March 3, 1914 (2, C. M.). 



COSMIOMETRA GARDINERI A. H. Clark 



Cosmiomelra gardineri A. H. CLARK, Proc. U. S. Nat. Mus., vol. 10, 1911, p. 6 (Anledon carinata record- 

 ed by Bell from South Africa possibly this species), p. 8 (southeastern Africa), p. 38 (description; 

 Saya de Malha, 135 fathoms); Criuoids of the Indian Ocean, 1912, p. 41 (possible identity with 

 Antcdon carinala Bell, 1909), p. 214 (synonymy; Saya de Malha, 135 fathoms); Smithsonian 

 Misc. Coll., vol. 61, No. 15, 1913, p. 43 (published references to the specimen in the B. M.; locality; 

 characters; comparison with C. woodmasoni); Unstalked crinoids of the Siboga-Exped., 1918, p. 

 154 (in key; range; references); John Murray Exped., 1933-34, Sci. Reports, vol. 4, No. 4, 1936 

 (Jan. 1937), p. 101 (range), p. 104. 



Diagnostic features. A species with 20 arms in which the elements of the division 

 series and first two brachials are entirely smooth dorsally with a low and broad median 

 carination; the outer brachials are very strongly overlapping and broadly carinate; 

 and the cirri are slender, 30 mm. long with 29-31 segment-;. 



Description. This species is closely related to C. woodmasoni. The cirri are longer 

 and more slender, 30 mm. long with 29-31 segments, which are proportionately longer. 

 There are 20 arms. The carination of the division series is broader than it is in C. 

 woodmasoni. The lower brachials have a broad median keel quite different from the 

 faintly indicated crest of C. woodmasoni, and the outer brachials arc very strongly 

 overlapping and broadly carinate, the raised portion, when viewed dorsally, having a 

 triangular shape, the apex of the triangle being proximal; the same type of carination 

 is found in C. imodmasoni, but the triangles are narrower. 



Locality. Saya de Malha, Indian Ocean; 247 meters; Percy Sladen Trust Expedi- 

 tion to the Indian Ocean in 1905, J. Stanley Gardiner, leader; Sea Lark [A. II. Clark, 

 1911, 1912, 1913, 1918, 1937] (1, B. M.). 



History. The type and only known specimen of this species was secured by the 

 Percy Sladen Trust Expedition to the Indian Ocean on the Sea Lark under the leader- 

 ship of Prof. J. Stanley Gardiner in 1905, but was not mentioned by Prof. F. Jeffrey 

 Bell in his account of the echinodcrms of that expedition published in 1909. It \vas 

 described in 1911 in a paper on the crinoids of the coasts of Africa, and at the same time 

 it was suggested that the Antedon (Truj/ioinitra) c/iri/m/ii recorded by Bell from deep 

 water off Saya de Malha might be this species. It was mentioned in my memoir on 

 the crinoids of the Indian Ocean published in 1912, and was redescribed in my account 



