A MONOGRAPH OF THE EXISTING CRINOIDS 349 



slightly longer than broad, and those following are still longer, though not so much as 

 one-third again as long as broad except for the three or four terminal which are from 

 half again to twice as long as broad. The third-sixth segments have a faint trace of a 

 sharpening along the side turned toward the arm tip. P 3 is 16-17 mm. long, with 20 

 segments, slightly stouter than P 2 basally and tapering more slowly so that it is 

 markedly stouter in the distal half. P 4 is 13.5 mm. long, with 19 segments, and re- 

 sembles P 3 but is less stout and the segments in the distal third are much longer, be- 

 coming terminally three times as long as broad. P 5 is 11 mm. long, with 19 segments. 

 The distal pinnules are very slender and almost hairlike, 17 mm. long, with 34 seg- 

 ments, which in the proximal half are mostly between half again and twice as long 

 as broad, becoming three times as long as broad distally. 



The specimen described is from Albatross station 5100. 



Localities. — Albatross station 5100; China Sea, off southern Luzon; south channel 

 to Manila Bay; Corregidor Light bearing N. 16° E., 5.7 miles distant Qat. 14°17'15" 

 N., long. 120°32'40" E.); 64 meters; gray sand; January 2, 1908 [A. H. Clark, 1908, 

 1909, 1911, 1912, 1918] (1, U.S.N.M., 35245). 



Albatross; China Sea, off southern Luzon; Limbones Cove; littoral; February 8, 

 1909 [A. H. Clark, 1911 (as Limborres Cave), 1912, 1918] (1, U.S.N.M., 35196). 



History. — -The first known specimen of this species was dredged by the Albatross 

 at station 5100 in the Philippines and was recorded by me in 1908 under the name of 

 Himerometra milberti. As this specimen seemed to agree well with the description 

 and figures of milberti given by Carpenter in the Challenger report, it was for a long 

 time considered as representing the typical form of that species. Thus in 1909 the 

 milberti with which Amphimetra molleri was compared was in reality this specimen, 

 as was the milberti with which were compared the specimen of discoidea (=tessellata) 

 from ?the vicinity of Perth recorded in 1911, and also the specimens of discoidea 

 (=tessellata) from between Fremantle and Geraldton recorded in 1914. 



In 1911 a second specimen was recorded, as Amphimetra milberti, from Limborres 

 Cave (= Limbones Cove) where it had been coUected by the Albatross. 



In revising the species of Amphimetra for the Siboga report, I found that the 

 species represented by these two specimens is quite different from any previously 

 described. I therefore included its chief diagnostic characters in my key to the species 

 of tills genus and distinguished it by the name of spectabilis, giving the Philippines as 

 its habitat. It has not heretofore been formally described. 



AMPHIMETRA MOLLERI (A. H. Clark) 



Plate 38, Figtjbes 169-171 



Comatula laevissima (part) Grube, Jahresb. schlesisch. Ges. vaterl. Cultur, 1875, p. 74 (description; 

 North Borneo). — P. H. Carpenter, Proc. Zool. Soc. London, 1882 (1883), p. 746 (correctly 

 referred by Bell to Antedon). 



Antedon laevissima (part) Bell, Proc. Zool. Soc. London, 1882, p. 533 (listed). — P. H. Carpenter, 

 Proc. Zool. Soc. London, 1882 (1883), p. 746; Challenger Reports, Zoology, vol. 26, pt. 60, 1888, 

 p. 54 (10-armed species), p. 193 (in key), p. 197 (comparisons), p. 366 (bathymetric range), p. 

 378 (Borneo). — A. H. Clark, Crinoids of the Indian Ocean, 1912, p. 34 (of P. H. Carpenter, 

 1888 = Amphimetra milberti [error]), p. 40 (of Bell, 1902 = Amphimetra producta + A. vwlleri+ 

 Decametra taprobanes+D. mobiusi), p. 289 (of Bell, 1902; account quoted); Smithsonian Misc. 

 Coll., vol. 61, No. 15, 1913, p. 83 (of Bell, 1902 = Amphimetra [Heteromelra] flora + Decametra 

 mobiusi + Decametra taprobanes; B. M., MS. = Amphimetra producta). 



