190 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Himerometra magnipinna A. H. CLARK, Smithsonian Misc Coll., vol. 52, 1908, p. 214 (description; 

 Albatross stations 5139 and 5147); Proc. Biol. Soc. Washington, vol. 22, 1909, p. 7 (listed); 

 Proc. U. S. Nat. Mus., vol. 39, 1911, p. 540 (Ulugan Bay, Palawan); Smithsonian Misc. Coll., 

 vol. 60, No. 10, 1912, p. 2 (Antedon crassipinna Hartlaub, in part), p. 17 (Cochinchina; detailed 

 description), p. 18 (additional localities; descriptions); Proc. U. S. Nat. Mus., vol. 43, 1912, 

 p. 394 (St. Mathias Island); Crinoids of the Indian Ocean, 1912, p. 114 (synonymy; Philippine 

 Islands; St. Mathias Island; 0-21 fathoms); Proc. Biol. Soc. Washington, vol 26, 1913, p. 179 

 (range in east Asia); Proc. U. S. Nat. Mus., vol. 46, 1913, p. 285 (in key), p. 287 (synonymy; 

 range); Journ. Washington Acad. Sci., vol. 5, 1915, p. 214 (Malayan species; range and its 

 significance); Unstalked crinoids of the <Si6o</a-Exped., 1918, p. 74 (in key; range; synonymy; 

 notes; station 209), p. 274 (listed). GISL^N, Zool. Bidrag Uppsala, vol. 9, 1924, p. 41 (details 

 of arm structure), pp. 44, 51 (reversion), p. 77 (syzygies), p. 283, fig. 8, p. 45 (arm base), fig. 98, 

 p. 87 (synarthrial face), figs. 144-148, p. 95 (pinnule articulations), fig. 149, p. 98 (same). 

 A. H. CLARK, Treubia, vol. 14, livr. 2, 1933, p. 211 (Nassi Besar); Proc. Biol. Soc. Washington, 

 vol. 47, p. 9, 1934 (first record from Singapore), p. 11 (Singapore; notes). GISL&N, Kungl. 

 Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, pp. 41, 46, 47, 50, 52. A. H. CLARK, 

 Temminckia, vol. 1, 1936, p. 302 (Ternate; notes). -GiSLfiN, Kungl. Fysiogr. Sallsk. Lund 

 Forh., vol 7, No. 1, 1936, p. 2 (Cochinchina), p. 4 (French Indochina), p. 6 (range), p. 8 

 (Pulo Condor; notes). 



Diagnostic Jeatures.- The enlarged proximal pinnules are long, very stout basally, 

 and gradually taper distally to a delicate and flagellate tip; they are composed of 28-42 

 (usually 30-35) segments, nearly all of which are broader than long, or at least as broad 

 as long ; the distal edges of the segments in the middle half of the proximal pinnules are 

 swollen but are smooth and not spinous; none of the segments of the proximal pinnules 

 are carinate, and the following pinnules are without carinate processes on the earlier 

 segments. The cirri are rather short, 25^11 (usually 30-35) mm. in length, and are 

 composed of 28-40 (usually 30-35) segments of which the distal are wholly without, 

 or bear only very slight, dorsal processes. There are 33-62 (usually about 45) arms 

 which are 130-184 (usually about 145) mm. long. 



Characters of the type specimen. The cirri are XV, 28-32 (usually 28-30), 30 mm. 

 long. The distal segments are smooth, or bear only very faint dorsal tubercles. The 

 62 arms are 120 mm. long. The proximal pinnules are very stout and very long, 

 tapering evenly from the base to the tip ; they are composed of 28-29 segments of which 

 the distal ends are slightly swollen but are not spinous or overlapping. 



Notes. Hartlaub said that the specimen from Cochinchina, which he referred to 

 H. crassipinna, is of a beautiful purple-violet color. In contrast to the conditions in 

 the three specimens of H. crassipinna he described, the IBr! are entirely free laterally. 

 There are 45 arms of which some on the outer side of the postradial series arise directly 

 from a IIBr axillary. Compared with the specimens of H. crassipinna P D is relatively 

 very long, reaching about 28 mm., and, in common with the pinnules following, it is 

 somewhat more slender than the corresponding pinnules in H. crassipinna. 



I examined this specimen in the Hamburg Museum. The cirri are about XXX 

 (with some undeveloped), 28-32, from 35 to 41 mm. long. The cirri are moderately 

 stout. The longest proximal segments are slightly broader than long. There are no 

 dorsal spines, but the dorsal surface of the short distal segments is convex. The 

 antepenultimate segment bears a small tubercle which quickly becomes obsolete 

 on the one or two preceding segments. The 45 arms are 160 mm. long. P D is 28 mm. 

 long, with 33-34 segments, very stout basally and tapering evenly to a delicate tip. 

 The earlier segments are twice as broad as long, those following gradually increasing 



