A MONOGRAPH OF THE EXISTING CRINOIDS 169 



1912, a specimen of Cyllometra albopurpurea" 'collected by Dr. F. Hilgendorf in Japan 

 was recorded. 



In my memoir on the crinoids of the Indian Ocean published on November 22, 

 1912, I redescribed and figured Cyllometra soluta and listed C. manca, C. albopurpurea, 

 C. disciformis, and C. anomala, giving their synonymy and ranges. In a paper on 

 the crinoids of eastern Asia based upon a collection made by Captain Suensson 

 published on August 8, 1913, I recorded Cyllometra albopurpurea from Okinawashima, 

 Riu Kiu Islands. This record was based upon a specimen in the Yale University 

 Museum, although that fact was not mentioned. In a paper on the crinoids of the 

 British Museum published on December 31, 1913, I gave notes on the type specimens 

 of Carpenter's Antedon manca and A. disciformis, and recorded three specimens of 

 Cyllometra albopurpurea from the Inland Sea. My report on the crinoids of the 

 Siboga expedition published in March 1918 included a key to the species of Cyllometra 

 in which disciformis, albopurpurea, manca, and soluta were accepted as valid species. 

 A specimen of C. manca from station 305 was recorded and described, and C. disci- 

 formis was discussed in detail on the basis of 56 specimens from the Albatross Philip- 

 pine collection. 



Dr. Torsten Gisle"n in 1922 recorded and gave detailed notes on three specimens 

 of Cyllometra disciformis from Bock's stations 12, ?33, and 35; one specimen of C. 

 manca from station 19; and four specimens of C. albopurpurea from stations 53 and 

 59. At the same time he described C. pulchella on the basis of 46 specimens from 

 stations 6, 12, 13, 16, and 17. In 1924 Dr. Gisle"n discussed various morphological 

 points in connection with this species. 



In a memoir on the crinoids collected in Japan by Dr. Th. Mortensen, which 

 was published in 1927, Dr. Gislen recorded and gave extensive notes on specimens 

 identified as Cyllometra pulchella, C. albopurpurea, and C. manca. 



In 1929 I recorded three specimens of Cyllometra manca from Rotti Strait where 

 they had been found on the Banjuwangi-Danvin No. 2 cable by the cable repair 

 ship Cable of the Eastern and Associated Telegraph Co. 



CYLLOMETRA GBACILIS A. H. Clark 



PLATE 18, FIGURES 88-90; PLATE 19, FIGURE 97 



Cyllometra gracilis A. H. CLARK, Ann. Mag. Nat. Hist., ser. 8, vol. 10, 1912, p. 35 (description; 

 Siboga station 49a) ; Unstalked crinoids of the Siboga Exped., 1918, p. viii (discovery by the 

 Siboga and its significance), p. ix (relationship with C. albopurpurea), p. 114 (in key; range), 

 p. 115 (detailed description; station 49o), p. 271 (listed), pi. 20, fig. 48. GILSEN, Nova Acta 

 Reg. Soc. Sci. Upsaliensis, ser. 4, vol. 5, No. 6, 1922, p. 84 (comparisons). 



Diagnostic features. The cirri are relatively long and slender, 21 mm. long with 

 25-30 segments of which the longest are about twice as long as the proximal width; 

 the 26-28 arms are about 50 mm. long. 



Description. The centrodorsal is discoidal with a flat or slightly concave dorsal 

 pole 2 mm. in diameter. The cirrus sockets are arranged in one and a partial second 

 marginal row. 



The cirri are XXIII, 25-30, 21 mm. long. The first segment is very short, the 

 second is about twice as long as the first, from one-third to one-half again as broad 



724008 47 12 



