A MONOGRAPH OF THE EXISTING CRINOIDS 97 



sand and small shells; November 5, 1908 [A. H. Clark, 1911, 1912, 1918] (1, U.S.N.M., 

 27499). 



Off Great Nicobar Island (lat. 6°15' N., long. 93°35' E.); 1,901-2,047 meters; 

 cable repair ship Patrol, Eastern and Associated Telegraph Co. [A. H. Clark, 1929] (1, 

 B. M.). 



Off Madras (lat. 12°53' N., long. 80°45' E.); 1,097 meters; cable repair ship The 

 Cable, Eastern Australasia and China Telegraph Co., through A. A. Davison [A. H. 

 Clark, 1932] (1, B. M.). 



Oeograj>hical range. — From the Moluccas and the Malay Archipelago northward 

 to Formosa (Taiwan) and northwestward to Madras. 



Bathy metrical range. — From 55 to 2,047 meters. 



History. — This species was first described in 1909 under the name of Crotalometra 

 rustica from a single badly broken specimen that had been dredged by the Royal 

 Indian Marine Survey steamer Investigator in the Malay Archipelago in 30 fathoms. 

 In 1911 I described under the name of Crotalometra infelix a small individual that un- 

 doubtedly belongs to the same specific type. In 1912 I described Thalassometra mar- 

 gi?ialis from two specimens from Siboga station 226, and in my memoir on the crinoids 

 of the Indian Ocean published toward the end of the year I redescribed and figured 

 Thalassometra rustica and listed Th. infelix with the synonymy and range. In my 

 memoir on the uustalked crinoids of the Siboga expedition published in 1918 I listed 

 Crotalometra rustica, under which I placed Crotalometra infelix as a synonym, and re- 

 described and figured Crotalometra marginalis. 



When giving some notes on Crotalometra magnicirra in 1928 Prof. Torsten Gislen 

 said that C. marginalia is probably a large specimen of this species. 



In 1929 I described and figured Crotalometra eridanella from a specimen from off 

 Great Nicobar Island that had been brought up on a cable from a depth of 1,040-1,120 

 fathoms by the cable repair ship Patrol of the Eastern and Associated Telegraph 

 Company. In 1932 I recorded and figured C. rustica from a specimen from off Madras in 

 600 fathoms that had been found on a cable brought to the surface by the cable repair 

 ship The Cable of the Eastern Australasia and China Telegraph Co. and had been 

 sent to the British Museum by A. A. Davison. 



Professor Gislen discussed certain features of the structure of Crotalometra mar- 

 ginata in 1934. 



CROTALOMETRA MAGNICIRRA (Bell) 



Antedon magnicirra Bell, Marine investigations in South Africa, vol. 4, 1905, p. 141 (description; 

 localities), pi. 4, figs. 1-3.— A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 126 

 (belongs to the genus Thalassometra); Proc. U. S. Nat. Mus., vol. 34, 1908, p. 482 (systematic 

 position); Proc. Biol. Soc. Washington, vol. 22, 1909, p. 18 (not placed in a revision of the 

 Thalassometridae) ; Proc. U. S. Nat. Mus., vol. 36, 1909, p. 404 (referred to Crotalometra); vol. 

 40, 1911, p. 5 (= Crotalometra magnicirra); Crinoids of the Indian Ocean, 1912, p. 41 (identity); 

 Smithsonian Misc. Coll., vol. 61, No. 15, 1913, p. 84 (B. M., MS. = sclateri). 



Antedon magnicirrus Bell, Marine investigations in South Africa, vol. 4, 1905, p. 142 (editorial error). 



Antedon magnicrinus Bell, Marine investigations in South Africa, vol. 4, 1905, pi. 4 (editorial error). 



Thalassometra magnicirra A. H. Clark, Proc. Biol. Soc. Washington, vol. 21, 1908, p. 126; Proc. 

 U. S. Nat. Mus., vol. 34, 1908, p. 482; Amer. Nat., vol. 42, No. 500, 1908, p. 542 (characteristic 

 oceanic species); Geogr. Journ., vol. 32, No. 6, 1908, p. 603 (same); Zool. Anz.. vol. 39, No. 

 11/12, 1912, p. 424 (compared with Th. [Crotalometra] marginalis); Crinoids of the Indian Ocean 

 1912, p. 41 (identity), p. 198 (synonymy; locality). 



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