A MONOGRAPH OF THE EXISTING CRINOIDS 437 



Antedon monacantha Hartlaub, Nachr. Gcs. Gottingen, May 1890, p. 179 (in part; specimen from 

 Torres Strait); Nova Acta Acad. German., vol. 58, No. 1, 1891, p. 61 (specimen from Torres 

 Strait; comparisons), pi. 3, fig. 33; Mem. Mns. Comp. Zool., vol. 27, 1912, p. 412 (specimen from 

 Torres Strait). 



Himerometra indica A. H. Clark, Smithsonian Misc. Coll., vol. 50, 1907, p. 356 (listed). 



Himerometra monocantha A. H. Clark, Smithsonian Misc. Coll., vol. 50, 1907, p. 356 (in part; listed). 



Slephanometra indica A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 10 (listed); Proc. 

 U. S. Nat. Mus., vol. 40, 1911, p. 6 (Antedon palmata recorded by Bell from southeast Africa is 

 this species), p. 8 (occurs on the southeast coast of Africa), p. 13 (common to southeast Africa 

 and Ceylon), p. 26 (synonymy; localities; description of a specimen; comparisons); Bull. Mus. 

 Hist. Nat., Paris, 1911, p. 252 (Madagascar; description); Smithsonian Misc. Coll., vol. 60, 

 No. 10, 1912, p. 21 (discussion of Hartlaub's specimen from Torres Strait) ; Crinoids of the Indian 

 Ocean, 1912, p. 3 (history), p. 11 (represented in the Ceylon region), pp. 34, 40, 41 (identity 

 of previous records), p. 135 (synonymy; summary of records); Smithsonian Misc. Coll., vol. 61, 

 No. 15, 1913, p. 29 (published references to specimens in the British Museum; Rodriguez; 

 Seychelles [specimens from Tuticorin and the Maldives are prolectus]) ; Unstalked crinoids of 

 the Siboga-Exped., 1918, p. IX (range), p. 94 (in key; range), p. 97 (synonymy; notes; Torres 

 Strait and Madagascar [specimens from station 301, Ceylon, and Mer are prolectus]). — H. L. 

 Clark, Spolia Zeylanica, vol. 10, part 37, 1915, p. 93 (occurs at Ceylon). — Gisl£n, Kungl. 

 Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, p. 20. — A. H. Clark, John Murray 

 Exped. 1933-34, Sci. Reports, vol. 4, No. 4, 1936, p. 87 (listed), p. SS (Mabahiss stations 10, 

 M. B. I. d.\ notes; range; comparison with prolectus), p. 104. 



Slephanometra monacantha A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 10 (in part; 

 listed); Vid. Medd. Naturh. Foren. K0benhavn, 1909, p. 169 (specimen from Torres Strait); 

 Mem. Australian Mus., vol. 4, pt. 15, 1911, pp. 718, 769 (record from Torres Strait); Die Fauna 

 Siidwest-Australiens, vol. 3, Lief. 13, 1911, pp. 440, 443 (record from Torres Strait); Internat. 

 Revue gesamt. Hydrobiol. und Hydrogr., 1915, pp. 223 ff. (record from Torres Strait); Smith- 

 sonian Misc. Coll., vol. 60, No. 10, 1912, p. 21 (Hartlaub's specimen from Torres Strait appears 

 to be nearer indica than ?nonacantha [ — prolectus]). 



Lamprometra callipecha H. L. Clark, Carnegie Inst. Washington Publ. 212, 1915, p. 104 (description; 

 Mer). — A. H. Clark, Unstalked crinoids of the Siboga Exped., 1918, p. 100, footnote 1 (in 

 synonymy of Lamprometra prolectus [ = palmata]). 



Stcphanometra callipecha H. L. Clark, The echinoderm fauna of Torres Strait, 1921, p. 8 (collected 

 by the Carnegie Exped., 1913), p. 21 (Mer; possibly is S. indica; notes), pp. 192 ff. (range), pi. 

 1, fig. 9 (colored), pi. 36, figs. 2, a-e. 



[Slephanometra] callipech H. L. Clark, The echinoderm fauna of Torres Strait, 1921, p. 22, footnote 1 

 (typographical error). 



Slephanometra indica indica A. H. Clark, John Murray Exped. 1933-34, Sci. Reports, vol. 4, No. 4, 

 1936, p. 88 (comparison with S. i. prolectus), p. 100 (range). 



Diagnostic features. — The outer cirrus segments are wholly without dorsal 

 processes, being merely more or less sharply carinate in the middorsal line; P, is flex- 

 ible, flagellate, delicate, and slender, much smaller and weaker than P 2 ; P 2 is very 

 long, much longer than is S. protectus, enlarged, though not excessively so, stiffened, 

 distally gradually tapering to a fine stiff point, and recurved, and is composed of 16-20 

 (usually 17-20) segments, of which the fourth and fifth are not abruptly longer than 

 the others; P 3 is small, flexible, and weak, like the pinnules following; there are 18-30 

 arms 65-153 mm. long; and the cirri have 22-25 segments. 



Description. — The centrodorsal is small, flat or convex, more or less subpentagonal, 

 less than 5 mm. in diameter, with the bare dorsal pole about 3 nun. across. The cirrus 

 sockets are arranged in from two to three crowded alternating marginal rows. 



The cirri are XXI-XLV, 22-25, about 12 mm. long. The first three segments 

 are about as long as broad or slightly broader than long, the fourth-eighth are longer 



