258 MR. C. J. "WITH ON SOUTH-AMERICAN CHELIFERIN^ 



granular above and laterally, but almost smooth below, while the hand is partly quite 

 smooth and partly indistinctly granular. The hairs of the three proximal joints are 

 short and obtuse, while those of the hand are more simple. The trochanter, which 

 is as long as wide, is anteriorly regularly and distinctly convex in the middle and 

 terminates with a slightly marked convexity ; posteriorly it is suddenly produced into 

 a rounded protuberance and dorsally into a rather low, somewhat conical protuberance. 

 The femur has a very short and well-defined stalk, beyond which it is distinctly 

 attenuated towards the extremity. It is 2-2 as long as wide; both margins are almost 

 straight beyond the stalk, from which the anterior outline is slightly raised, while the 

 posterior is very distinctly and abruptly so. The tihia, which has a short and well- 

 defined stalk, is a little longer and wider than the femur, and 2'1 as long as wide ; 

 the anterior outline is basally moderately convex and then very slightly concave ; the 

 posterior outline beyond the basal elevation, which is separated from the prominent 

 condylus by a deep notch, but which is not limited distally, is first almost straight and 

 then moderately convex. The chela, which is about 3 -5 as long as wide, is scarcely 

 wider than the trochanter is long; the hand, which is at least 1"1 as long as the tibia, 

 but scarcely 1"2 wider, is about twice as long as broad, almost 1'2 as wide as deep, and 

 1*4 as long as the fingers, which are much longer than hand is wide and do not 

 gape when closed ; the exterior outline of the hand just beyond the stalk is very 

 abruptly produced and then becomes almost straight, while the interior is more 

 gradually convex ; the dorsal and ventral margins are almost straight. Both fingers 

 bear anteriorly 2 accessory teeth near to the tip, while the number posteriorly is 

 much greater, viz. about 8 in the immovable and 5 in the movable finger in the 

 distal half. Anteriorly the immovable finger has only a single " spot " placed 

 between the tactile hairs ; posteriorly it has a single " spot " placed between 

 the three basal tactile hairs which stand close together, and two just beyond the 

 median tactile hair ; while the movable finger has two " spots " at least, placed between 

 the basal and the median tactile hairs, and a single one beneath and in front of the 

 latter. 



Coxce. — The coxse show perhaps greatest similarity to those of Ch. rudis Balz., but 

 differ by their less elongated shape ; the second and the third pair are distinctly 

 widened out towards the extremity and are of somewhat triangular appearance, as 

 the inner margins, especially those of the second pair, are short. The fourth 'pair, 

 which are somewhat trapezoidal and scarcely widened out towards the end, have the 

 inner margin, which is about as long as the somewhat concave hinder margin, passing 

 gradually into the latter. 



Legs. — The proximal joints are indistinctly granular. The hairs of the dorsal side 

 are short and obtuse or dentated ; those of the ventral are longer, pointed, and more or 

 less simple. The tarsal " tactile " hair is two-thirds removed from the base and as 

 long as this distance. The legs are fairly long and slender, and have the trochantin 



