306 3IK. C. J. WITH ON SOUTH- AMERICAN CHELIFERIN^ 



and is scarcely 2*1 as long as wide ; anteriorly, beyond the stalk, it is moderately 

 convex and then a trifle concave, while posteriorly, beyond the not very prominent 

 condylus and long, not well-defined basal elevation, it is almost straight, and then 

 terminally moderately convex ; the ventral outline is moderately convex, w-hile the 

 dorsal is very slightly so, but with the antero-dorsal surface slightly produced 

 [cf. figs. 30 d-e). The chela, which is distinctly three times as long as wide, is scarcely 

 1-1 as broad as the trochanter is long ; the hand, which is a little longer than, but 1"3 

 as wide as the tibia, is 1"6 as long as wide, a trifle deeper than wide, and scarcely 1-2 

 longer than the fingers, which are 1'4 as long as the hand is wide and gape slightly 

 when closed ; the anterior outline is moderately convex, the posterior and dorsal are 

 slightly so, and the ventral is almost straight. The immovable finger has anteriorly 

 five accessory teeth and the movable one three, while both fingers posteriorly possess 

 about 15 accessory teeth [cf. figs. 30 e-f). Anteriorly the immovable finger has from 

 5-16 " sjtots" in two groups (fig. SO e) and posteriorly five in a longitudinal row, while 

 the movable finger has only two posteriorly (fig. oOy"). 



Coxce. — Cf. description of following species and text-fig. 74 (p. 291). 



Legs. — The hairs are long. The legs are long and slender ; the tibia of the first pair 

 of legs is about I'l as long as the tarsus, which is 4'6 as long as deep; the femur of 

 the fourth pair of legs is 2'9 as long as deep, a trifle longer than the tibia, and only 

 half as deep as the tarsus is long. 



Colour. — The palps are light reddish brown, the cephalothorax is somewhat darker 

 brown, and the abdomen again paler brown. 



Measurements. — Cephalothorax 0'966 (0'805) ; abdomen 2*070 (l-03o) mm. 



Palps: trochanter 0-483 (0-322); femur 0-805 (0-345); tibia 0-815 (0-391); hand 

 0-851 (0-515), depth 0-529 ; finger 0-736 mm. 



LegL: femur 0*555 (0-180), trochantin 0-091 (0190); tibia 0-448 (0-114); tarsus 

 0-403 (0-088) mm. 



Leg IV. : femur 0-684 (0-240) ; tibia 0-669 (0-140) ; tarsus 0-471 (0-103) mm. 



Female. 



Palps. — Th e;(rocAan?^er is dorsally prolonged into a rather low rounded protuberance. 

 The femur, \'shicli is about 2-4 as long as wide, is more gradually convex beyond the 

 stalk posterioi-ly and so it is dorsally without terminal concavity. The tibia, which is 

 almost 2*3 as long as broad, has not the antero-dorsal surface produced. The hand, 

 which is 1-4 as wide as the tibia, is 1-8 longer than wide, a trifie wider than deep, and 

 1-3-1-4 longer than the fingers, which are distinctly 1'3 as long as the hand is wide, 

 and which do not gape when closed. The number of accessory teeth is somewhat 

 smaller than in the male, while the " spots " do not provide any characters of interest. 



Cox(B. — The fourth pair are very similar to those of Ch. argentiniis Thor, {cf. text- 

 fig. 75), being somewhat trapezoidal with the inner margin almost twice as long as the 

 hinder. 



