A MONOGRAPH OF THE EXISTING CRINOIDS 321 



proximal fourth of the arms have produced proximal ends that overlap the distal 

 ends of the preceding brachials; the brachials beyond the proximal fourth of the arms 

 are entirely smooth, joining perfectly end to end. 



Remarks. — This species is very close to H. sarae from which it differs in lacking 

 the strongly swollen dorsal surface of the ossicles of the division series and brachials, in 

 having much shorter distal cirrus segments, and in having the earlier segments of the 

 lower pinnules conspicuously carinate. 



Localities. — Albatross station 5147; Sulu (Jolo) Archipelago, in the vicinity of 

 Siasi; Sulade Island (E.) bearing N. 3° E., 8.4 miles distant Gat. 5°41'40" N., long. 

 120°47'10" E.); 38 meters; coral sand and shells; February 16, 1908 [A. H. Clark, 

 1909, 1912, 1918] (1, U.S.N.M., 25515). 



Albatross station 5146; Sulu (Jolo) Archipelago, in the vicinity of Siasi; Sulade 

 Island (E.) bearing N. 18° W., 3.4 miles distant (lat. 5°46'40" N., long. 120°48'50" 

 E.); 44 meters; coral sand and shells; February 16, 1908 [A. H. Clark, 1908, 1912, 

 1918] (1, U.S.N.M., 35089). 



History. — The first known specimen of this species was recorded by me without 

 comment in 1908 under the name of Himerometra bengalensis from Albatross station 

 5146. In the following year a 10-armed specimen from station 5147 was described 

 as a new species under the name of Amphimetra parilis. 



The first specimen served as the basis for the inclusion of the Pbilippines in the 

 range of Heterometra bengalensis in my monograph of the crinoids of the Indian 

 Ocean published in 1912, and the description and figure of the ambulacral deposits 

 of H. bengalensis in Part 2 of the present work were likewise based upon it. But the 

 error in determination was discovered before the report on the unstalked crinoids of 

 the Siboga expedition was published (1918), although at that time the specimen was 

 not redetermined. 



In the monograph of the crinoids of the Indian Ocean (1912), Amphimetra parilis 

 was simply listed as a distinct species; but in the report on the Siboga crinoids (1918) 

 one of the two specimens included by Grube in his Comatula laevissima was included 

 under A. parilis as a questionable synonym (see pages 349 and 353). 



HETEROMETRA BENGALENSIS (HarUaab) 



Plate 30, Figures 127-130 

 [See also vol. 1, pt. 2, figs. 457-462 (pinnule tips), p. 266.] 



Anledon bengalensis Hartlaub, Nachr. Ges. Gottingen, May 1890, p. 182 (description; Bay of 

 Bengal); Nova Acta Acad. German., vol. 58, No. 1, 1891, p. 17 (in key), p. 19 (detailed descrip- 

 tion and comparisons; Bay of Bengal), p. 113 (in Gottingen Mus.), pi. 1, fig. 2, pi. 2, fig. 16. — 

 Herdman, Ceylon Pearl Oyster Rep., vol. 5, Suppl. Rep. 41, 1906, p. 449 (redetermination of 

 Chadwick's A. anceps). — Hamann, Bronns Klassen und Ordnungen des Tier-Reichs, vol. 2, 

 Abt. 3, 1907, p. 1582 (listed).— A. H. Clark, Crinoids of the Indian Ocean, 1912, p. 36 (identity). 



Anledon anceps Chadwick, Rep. Ceylon Pearl Oyster Fisheries, pt. 2, Suppl. Rep. 11, 1904, p. 153 

 (occurs at Ceylon), p. 157 (stations xxiv and lvii).— Herdman, Ceylon Pearl Oyster Rep., 

 vol. 5, Suppl. Rep. 41, 1906, p. 449 (correction of preceding record). — A. H. Clark, Crinoids 

 of the Indian Ocean, 1912, p. 40 (same). 



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



Heterometra bengalensis A. H. Clark, Proc. Biol. Soc. Washington, vol. 22, 1909, p. 11 (listed); 

 Die Fauna Siidwest-Australiens, vol. 3, Lief. 13, 1911, p. 440 (in part; Australian specimens 

 are Zygometra punctata); Mem. Australian Mus., vol. 4, 1911, p. 722 (same); Crinoids of the 



