234 robert h. wolcott: 



somewhat longer than 2, gradually tapering and with sides nearly straight. 

 The paired papillae on its ventral surface are a little over two-thirds the 

 way toward the tip and the claw at the distal margin is only moderately 

 conspicuous. 5 is rather small, curved, with the ventral side unusually 

 concave and the tip slightly broadened and bearing the usual claws, 

 which are here rather prominent. The inner side of 2 bears a spine near 

 the middle, and the outer side two in the middle and nearer the dorsal 

 margin; 3 has a spine at the basal margin on the inner side and one at 

 the distal margin on the outer; 4 has in addition to the hairs on the 

 papillae, two small ones on either side of the claw at the distal margin of 

 the ventral surface; and 5 has a hair on the outer side a short distance 

 from the base. Piersig (97) describes the hairs on the outer side of 2 as 

 feathered but I can discover no such on my specimens. 



The epimera are quite typical. The anterior groups are quadrilateral 

 and the posterior rectangular with the spaces between them of consider- 

 able width, especially in the female, in which sex the posterior groups 

 are relatively shorter. The anterior groups have the anterior and pos- 

 terior margins nearly equal, the outer a little shorter and the inner still 

 shorter. I is nearly of equal breadth throughout and its inner end makes 

 up the whole of the inner margin; II is triangular with both anterior and 

 posterior margins convex; while its inner end is prolonged into a short 

 curved hook which turns backward and outward. Ill makes up only 

 one-fourth of the length of the posterior group, which has a slightly con- 

 cave anterior margin, a nearly straight inner margin, a convex posterior 

 margin, and rounded angles. 



The legs are of medium length, and rather slender, with the first pair 

 not much thicker than the rest. I in the female is nearly five-sixths of 

 the length of the body, II is about one-seventh longer than the body, 



III is shorter than II and about equal to the length of the body, while 



IV is more than a half longer than the body. In the male the legs are 

 relatively somewhat longer. Of the individual segments, 4 is longest and 

 the others follow in the order 5, 6, 3, 2, 1, except in IV where 5 is longest, 

 and it and 6 both exceed 4. All the legs are abundantly supplied with 

 hairs and spines, and many of them, especially on the middle segments 

 of the anterior three legs and at the tip of IV 5 are long and almost like 

 swimming hairs. IV has the ventral surface of 4 and 5 thickly beset with 

 spines of moderately length, and this pair of legs has, on the whole, more 

 spines, but they are shorter than in the preceding pairs. The distal end 

 of segment 6 on all the legs is broadened dorso- ventral ly and receives in 

 a groove in it the thus retractile claw. The claws possess two tips of 

 which the proxinal one is slightly curved and meets the distal tip which is 

 in line with the basal portion of the claw, at a right angle. The distal 

 tip curves slightly for a short distance beyond the junction of the two, 

 and then turns sharply ventrad so that its outer end is nearly parallel to 

 the proximal tip. 



Genital area flanked by two plates, each of which bears from 16 to 24 

 acetabula. The area in both sexes broader than long, each plate in the 

 female with a thickened strip running from the groove at the genital 



