A MONOGRAPH OF THE EXISTING CRINOIDS 41 



showing the progressive individualization of the hypozygals of the syzygies distally 

 along the arms. In my memoir on the crinoids of the Danish Ingolf Expedition pub- 

 lished in 1923 I gave the range of Stylometra spinifera as "From Yucatan to northern 

 Cuba and southward to Barbados and Grenada; definitely known from 102-508 meters: 

 but it occurs in lesser depths." 



In 1924 Prof. Torsten Gislen described the syzygies in a specimen with the arms 

 about 90 mm. long. He did not give the locality of the specimen; it was one of those 

 dredged by the Albatross in the vicinity of Habana, Cuba (stations 2319-2350). 



In 1928 Miss Pearl Lee Boone recorded " two fine specimens" of Stylometra spinijera 

 from off English Cay, Bahamas, in 190 fathoms, where they had been dredged by 

 Harry Payne Bingham on his yacht Pawnee I. In the introduction to the paper she 

 said that the crinoids secured by the expedition arc "represented by several specimens 

 of one species, Stylometra spinifera," and gave notes on the commensalism of the 

 species. She said "Interesting notes were obtained of commensalism between this 

 crinoid and three species of Crustacea, an aiiomuran, Uroptychus rugosus Milne Ed- 

 wards, an isopod, Arcturus pawneeanus Boonc, and a pedunculate barnacle, Scalpellum 

 rodstomi Boone. A species of ophiuran, Ophiothrix angulata Say, was also found en- 

 twined in the arms of one of these specimens." Barnacles of the genus Scalpellum are 

 commonly found attached to the cirri of this species throughout its range (see Part 2, 

 p. 639, pi. 53, fig. 1345). The two other crustaceans and the ophiuran mentioned are 

 not commensal with criuoids, though they occur in the same areas; they were simply 

 crushed in among the arms of the crinoids during capture. 



In 1929 I recorded a specimen in the British Museum that was taken from a 

 cable crossing the Snapper Bank off the southeast corner of Puerto Rico by a cable 

 repair ship of the Eastern and Associated Telegraph Co. 



In 1943 Prof. Torsten Gislen gave further notes on this species. 



In 1941 Dr. Hubert Lyman Clark recorded 10 specimens from Atlantis station 

 3303, off Playa Baracoa, Cuba, in 260 fathoms, and tliree from stations 3465, 3466, 

 and 3482, off Bahia de Matanzas in 190-200 fathoms, giving notes on the latter. 



Genus COSMIOMETRA A. H. Clark 



Antedon (part) HARTLATJB, Nachr. Ges. Gottingen, May 1890, pp. 169, 173, and following authors 



Thalassomctra (part) A. H. CLARK, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 360. 



Stenometra (part) A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 15. 



Cosmiometra A. H. CLARK, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 16 (diagnosis; genotype 

 Tkalassometra komachi A. H. Clark, 1908); Proc. U. S. Nat. Mus., vol. 40, 1911, p. 10 (repre- 

 sented in the West Indies by Stylo-metro) , p. 13 (common to southeastern Africa and the Bay of 

 Bengal, but not occurring in the Arabian Sea); Crinoids of the Indian Ocean, 1912, p. 10 (2 

 species in the Hawaiian Islands), p. 12 (represented in the southeast African region), p. 13 (cor- 

 responds to the West Indian Stylometra), p. 2-1 (next to Thalassometra the most widely spread 

 genus of the family; range), p. 59 (in key), p. 214 (original reference; genotype); Internal. Rev. 

 gesamt. Hydrobiol. und Hydrogr., 1914, pp. 4 and following (represents Stylometra in the Indo- 

 Pacific; range) ; Die Crinoiden der Antarktis, 1915, p. 125 (certain species of this genus show the 

 characteristic features of Anlhometra adriani), p. 181 (range; represented in the Atlantic by 

 Stylometra); Unstalkcd crinoids of the Stftoja-Exped., 1918, p. 148 (in key; range), p. 153 (key 

 to the included species). GISL^N, Kungl. Fysiograf. Siillsk. Hand!., new ser., vol. 45, No. 11, 

 1934, p. 20. 



