408 PROCEEDINGS OF THE ACADEMY OF [Juiie, 



lar swelling; the last pair, instead of being longer, is shorter than the 

 others; otherwise both ventral and dorsal cirri present the usual 

 modifications toward the end of the body. 



The very regular outUne of the body, when seen from above, is due 

 to the dense tufts of dorsal setae which project beyond the margins of 

 the scales and conceal all but the tips of the ventral setse, and from 

 l^elow to the remarkably even arrangement of the neuropodia and the 

 ^Tntral setse. The dorsal setse are very numerous and spread chiefly 

 in a horizontal plane, but in such a way as to overlap successively 

 from behind forward. They are very delicate, capillary, tapering from 

 base to tip and furnished with fine but distinct opposite or nearly 

 opposite processes of a length 3 to 4 times the diameter of the stem. 

 The ventral setse are arranged in very regular horizontal rows, 7 or 8 

 of which are subacicular and 2 supraacicular ; except the dorsalmost 

 and ventralmost rows, which have fewer, each contains 4 setse. 

 They are of a beautiful pale amber color, and transparent, moderately 

 stout, shghtly curved and with the tip smooth and strongly hooked. 

 As in Euphione they are densely bearded toward the end, about -g- or j, 

 according to the position of the seta, of the exposed part being provided 

 with numerous rows of long fine hairs, the terminal ones of which curve 

 backward and envelop the tips. On the first setigerous somite the 

 ventral setse are slender and tapering, with a close beard of fine hairs. 



Twelve pairs of elytra are borne on somites II, IV, \. ^ II, IX. XI, 

 XIII, XV, XVII, XIX, XXI, and XXIII. They are large, strongly 

 imbricate and decussate, and so close-fitting that their boundaries can 

 scarcely be distinguished except at the margins; the attachment to 

 the elytrophores is unusually firm. The first is irregularl}' circular 

 with a nearly central scar, the last roughly triangular, and the others 

 more or less bean-shaped, the more anterior ones being deeply emar- 

 ginated and asymmetrical. The 7th is the largest and the size falls 

 off each way to the 1st and 11th, the 12th again becoming larger. 

 Cilia form a strong marginal fringe around more than f of the circum- 

 ference of the scale, only the covered anterior portion being free ; they 

 are longest and coarsest on the lateral half of the anterior border, from 

 which large papillse are wanting, and where they are about equal to 

 the longest papillae present on the scale ; a small group of rather large 

 ones occurs also on the medial margin. Small cilia are scattered spar- 

 ingly over the greater part of the exposed surface of the scales and are 

 larger and more numerous on the area external to the scar ridge. The 

 papillae are remarkable for their size and form, and cover the entire upper 

 surface. The anterior medial region and a narrow area along the ante- 



