330 BULLETIN 82, UNITED STATES NATIONAL MUSEUM 



Amphimetra schlegelii A. H. CLARK, Vid. Medd. Naturh. Foren. K0benhavn, 1909, p. 158 (Japan 

 [one of the specimens is Amphimetra laevipinna]) ; Smithsonian Misc. Coll., vol. 60, No. 10, 

 1912, p. 14 (description of a specimen without locality; comparison with philiberti), p. 15 (original 

 description based upon one specimen of schlegelii and one of Amphimetra laevipinna, but the 

 former was selected as the type; northern representative of philiberti); Crinoids of the Indian 

 Ocean, 1912, p. Ill (synonymy; Japan [records from New Guinea, Tonga and Fiji refer to 

 Amphimetra papuensis]) ; Journ. Washington Acad. Sci., vol. 5, 1915, p. 214 (Malayan species; 

 range and its significance). GiSLlsN, Kungl. Svenska Vet.-Akad. Handl., vol. 59, No. 4, 1919, 

 p. 28 (discussion). 



Heterometra schlegelii A. H. CLARK, Unstalked crinoids of the Siboga-Exped., 1918, p. 77 (in key; 

 range). GISL^N, Kungl. Fysiogr. Sallsk. Handl., new ser., vol. 45, No. 11, 1934, pp. 22, 48. 

 GisLfiN, Kungl. Svenska Vet.-Akad. Handl., ser. 3, vol. 17, No. 2, 1938, p. 12 (relation to H. 

 africana var. delagoae). 



Amphimetra schleegelii GISLN, Kungl. Svenska Vet.-Akad. Handl., vol. 59, No. 4, 1919, p. 28 

 (discussion) . 



Diagnostic features. This is a small species without IIIBr series and with exceed- 

 ingly short discoidal brachials in the outer half of the arms. The cirri are about 20 

 mm. long with usually 30-35 segments of which the longest are about as long as broad 

 and the outer are about one-third again as broad as long; the twelfth and following 

 bear long sharp dorsal spines. The 12-13 arms are 70-85 mm. long. 



Description. The centrodorsal is thick discoidal, with the polar area thickly 

 covered with small low flattened tubercles. The cirrus sockets are arranged in two 

 closely crowded alternating rows. 



The cirri are XV, 26-35 (usually 30-35), about 20 mm. long. The first segment 

 is short, the second is about twice as broad as long, the third is slightly longer, and the 

 fourth is about as long as broad. The following to the twelfth or fourteenth are about 

 as long as broad, some of the more proximal being occasionally slightly longer than 

 broad, the length then very gradually diminishing so that the terminal segments are 

 about one-third again as broad as long. From the twelfth segment onward com- 

 paratively long sharp dorsal spines are developed. The opposing spine is considerably 

 longer than the spines on the few preceding segments; it is about equal to the width 

 of the penultimate segment in length, and is rather slender, abruptly curved basally 

 but becoming nearly straight in its distal half. 



The radials project slightly beyond the rim of the centrodorsal. The IBri are 

 oblong, three or four times as broad as long, in close lateral apposition, and with the 

 lateral edges swollen into a longitudinally elongate tubercle. The IIBr series are 

 4(3 + 4); there are three of these in the type specimen. The elements of the division 

 series and the first two brachials are in close lateral apposition with their neighbors 

 and are sharply flattened laterally. 



The 13 arms in the type specimen are about 70 mm. long. The first brachials 

 are short, slightly longer exteriorly than interiorly, interiorly united for about two- 

 thirds of their length. The second brachials are somewhat larger and irregularly 

 quadrate, rising to a rather prominent tubercle with the first which resembles the 

 tubercle on the articulation between the elements of the IBr series. The first syzygial 

 pair (composed of brachials 3+4) is oblong, about as long as the second brachials, 

 three times as broad as long. The following six brachials are oblong, about three 

 times as broad as long, those succeeding becoming wedge-shaped or almost triangular, 



