A MONOGRAPH OF THE EXISTING CRINOIDS %1 



Antedon polypus Lutken, Mus. Godeffroy Cat., vol. 7, 1879 (nomcn nvdvm). — Habtlaob, Nova 

 Acta Acad. German., vol. 58, No. 1, 1891, p. 78 (name found with specimens from the Pelew 

 Islands). — A. H. Clark, Vid. Medd. Naturh. Foren. K0benhavn, 1909, p. 117 (original reference 

 to the name; identity); Crinoids of the Indian Ocean, 1912, p. 138 (original reference to the 

 name; identity). 



Antedon sp. Bell, Proc. Zool. Soc. London, 1887, p. 140 (Andaman Islands). — A. H. Clark, Crin- 

 oids of the Indian Ocean, 1912, p. 32 (identity). — P. H. Carpenter, Challenger Reports, 

 Zoology, vol. 26, pt. 60, 1888, p. 265 (anomalous species from Mergui). 



Antedon andersoni Bell, Proc. Zool. Soc. London, 1888, p. 389, footnote 5 (collected by Dr. Ander- 

 son at Mergui). — P. H. Carpenter, Journ. Linn. Soc. (Zool.), vol. 21, 1889, p. 304 (specific 

 formula), p. 306 (detailed description; King Island, Mergui Archipelago, sublittoral; Elcgans 

 group; discussion and comparisons), pi. 26, figs. 1-5; pi. 27, fig. 8. — Hartlatjb, Nova Acta 

 Acad. German., vol. 58, No. 1, 1891, p. 78 (Pelew Islands; detailed descriptions of the specimens), 

 p. 113 (in Gottingen Mus.), pi. 3, fig. 36.— Koehler, Rev. Suisse Zool., vol. 3, 1895, p. 287 

 (Bay of Amboina; notes).— A. H. Clark, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 457 (refer- 

 ence to satisfactory description); Crinoids of the Indian Ocean, 1912, pp. 36, 37 (identity of 

 previous records). 



Pontiometra andersoni A. H. Clark, Smithsonian Misc. Coll., vol. 50, pt. 3, 1907, p. 355 (listed); 

 vol. 52, pt. 2, 1908, p. 212 (Albatross station 5146); Proc. Biol. Soc. Washington, vol. 22, 1909, 

 p. 5 (listed), p. 13 (closely related to Antedon finschii); Vid. Medd. Naturh. Foren. K0ben- 

 havn, 1909, p. 165 (synonymy; includes polypus; Singapore; descriptions of specimens), p. 167 

 (Philippine Islands; a specimen with about 100 arms), p. 193 (collected at Singapore by Svend 

 Gad); Proc. U. S. Nat. Mus., vol. 39, 1911, pp. 542, 543 (compared with Epimetra nympha); 

 Bull. Mus. Hist. Nat., Paris, 1911, No. 4, p. 252 (New Caledonia; description); Smithsonian 

 Misc. Coll., vol. 60, No. 10, 1912, p. 21 (localities); Proc. U. S. Nat. Mus., vol. 43, 1912, p. 

 397 (Singapore); Crinoids of the Indian Ocean, 1912, p. 22 (distribution in detail), pp. 32, 

 36, 37 (identity of previous records), p. 138 (synonymy; records).— Reichenspebger, Abh. 

 Senck. Naturf. Ges., vol. 35, No. 1, 1913, p. 83 (Kei Islands), p. 103 (details of the locality; 

 characters).— A. H. Clark, Proc. Biol. Soc. Washington, vol. 26, 1913, p. 144 (listed); Un- 

 stalked crinoids of the Siboga-Esped., 1918, p. 98 (references; notes; station 310); p. 276 

 (Usted).— GisL^N, Zool. Bidrag Uppsala, vol. 9, 1924, p. 42 (brachial angles), pp. 46, 51 (obli- 

 quity of joint faces), p. 53 (axillary angle), p. 78 (syzygies), p. 88 (articulations), p. 89 (articu- 

 lation in the IBr series), p. 99 (pinnule articulations), figs. 34, 35, p. 52, fig. 71, p. 75 (syzygial 

 face), fig. 100, p. 87 (synarthrial face), figs. 151-153, p. 98 (pinnule articulations).— A. H. 

 Clark, Journ. Linn. Soc. (Zool.), vol. 36, No. 249, 1929, p. 640 (80 miles NW. of Peuang; 

 40 fms.); Treubia, vol. 14, livr. 2, 1933, p. 213 (NW. of Rembang; Java Sea); Proc. Biol. Soc. 

 Washington, vol. 47, 1934, p. 11 (New Harbour; Singapore).— Gisl£n, Kungl. Fysiogr. Siillsk. 

 Handl., new ser., vol. 45, No. 11, 1934, p. 33.— A. H. Clark, Temminckia, vol. 1, 1936, p. 304 

 (Amboina; notes).— Gislen, Kungl. Fysiogr. Sallsk. Lund Forh. vol. 7, No. 1, 1936, p. 4 

 (French Indo-China), p. 6 (range), p. 12 (Pulo Condor). 



Pontiometra insperatus A. H. Clark, Proc. U. S. Nat. Mus., vol. 36, 1909, p. 397 (description; 

 Albatross station 5145); Crinoids of the Indian Ocean, 1912, p. 138 (synonymy; locality); 

 Proc. Biol. Soc. Washington, vol. 26, 1913, p. 144 (Usted). 



Pontiometra polypus A. H. Clark, Proc. Biol. Soc. Washington, vol. 26, 1913, p. 144 (listed). 



Description.— The centrodorsal is large and thick with swollen sides and a rather 

 deeply sunken dorsal pole. The cirrus sockets are arranged in three rows. 



The cirri are about L, about 80, and are up to 87 mm. long. They are stout, 

 and after the proximal third become increasingly compressed laterally. Their com- 

 ponent segments are fairly sunilar. On the third segment the distal dorsal edge 

 begins to stand out as a strong transverse ridge beset with fine spines. Farther on in 

 place of the transverse ridge there are two spines placed side by side, and finally 

 toward the end of the cirri each segment bears a stout spine which is directed distally. 



The radials are visible only in the interradial angles of the calyx. The IBr, are 



