3G0 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



the proximal half slightly longer and those in the distal half slightly shorter. The 

 Bynarthrial tubercles are rather prominent, though small, as in specimens of Amphi- 

 metra discoidea from Porl Molle, Queensland. P a is much larger than the small and 

 weak 1', and is long and stout; P 3 is similar to P 2 and is nearly as long and stout. 

 The following pinnules arc small and Weak, 



The specimen from Holothuria Bank, which is probably of this species, has 10 

 arms . r >0 mm. long. The cirri have 22 segments of which the fifth and following bear 

 long dorsal spines and of which the longest are not quite so long as broad. 



Localities.— Andai, New Guinea [P. H. Carpenter, 1881, 1883, 1888; Bell, 1882; 

 A. 11 1008, 1911, 1912, 1918] (1, L.M.). 



Holothuria Bank; 27 meters [A. H. Clark, 1911, 1913, 1918] (1, B.M.). 



History. — This species was lirst described by Dr. P. H. Carpenter in 1881 from 

 a single specimen in the Leyden Museum. In the year following Prof. F. Jeffrey Bell 

 gave a specific formula for it which was amended by Carpenter in 1S83. 



In his key to the species of the Milberti group in the Challenger report (1888) 

 Carpenter grouped Antedon pinniformis with Antedon serripinna and A. carpenteri 

 under (lie headings P B present, P 2 and P b the largest pinnules, and the cirrus segments 

 Bhort. He said that pinniformis has 25 cirrus segments and the first bracliials much 

 incised, whereas in serripinna and carpenteri there are barely 20 cirrus segments and 

 the lirst brachials are not incised. 



This grouping of pinniformis with serripinna and carpenteri, both of which 

 belong to the genus Oligometra, led me in 1908 to refer pinniformis also to that genus. 



In 1911, after studying Carpenter's type specimen in the Leyden Museum in 

 1910, 1 referred pinniformis to the genus Amphimetra, and in the same year I recorded, 

 as Amphimetra sp., another specimen from Holothuria Bank, which was definitely 

 assigned to Amphimetra pinniformis in 1913. 



AMPHIMETRA TESSELLATA TESSEIXATA (J. MUller) 



Plate 40, Figures 185-187 



Aleclo tessellata J. Muller, Monatsb. prcuss. Akad. Wiss., 1841, p. 184 (description; India); Archiv. 



fur Xaturg., 1841, vol. 1, p. 144 (description; India); Abh. preuss. Akad. Wiss., 1841 (1843), p. 



224. — A. H. Clark, Crinoidsof the Indian Ocean, 1912, p. 282 (synonymy; original description 



quoted; unidentifiable). 

 Comatula (Aleclo) milberti J. Muller, Monatsb. preuss. Akad. Wiss., 1846, p. 178 (description; 



North America; type brought from New York); Abh. preuss. Akad. Wiss., 1S47 (1849), p. 255 



(redescribed). — A. H. Clark, Bull. Mus. Hist. Nat., Paris, 1911, p. 245 ( = Amphimetra milberti); 



Crinoids of the Indian Ocean, 1912, p. 30 (same). 

 < 'ninntula jacquinoli J. MCller, Monatsb. preuss. Akad. Wiss., 1846, p. 178 (description; Ceram) ; 



Abh. preuss. Akad. Wiss., 1847 (1849), p. 255 (redescribed). — Dujardin and Hupe, Histoire 



naturelle des zoophytes, fichinodermes, 1862, p. 202 (redescribed). — A. H. Clark, Bull. Mus. 



Hist. Nat., Paris, 1911, p. 244 ( = Amphimetra milberti); Crinoids of the Indian Ocean, 1912, 



p. 30 (same). 



Uuta tesscllata J. Muller, Abh. prouss. Akad. Wiss., 1847 (1849), p. 251 (redescribed). — 



Dcjaruin and Hun':, Histoire naturclle des zoophytes, Echinodermes, 1862, p. 202 (synonymy; 



description; mcr des Indes). — P. H. Carpenter, Trans. Linn. Soc. (Zool.), ser. 2, vol. 2, 1879, 



p. 29 (unabl i > place it cither in Antedon or Actinametra) . — A. H. Clark, Crinoids of the Indian 



Ocean, 1912, p. 30 (identity doubtful). 

 Alecto milberti Lutken, Gronlands fichinodermata, 1857, p. 60. 



