190 



ME. C. J. WITH OjN^ SOUTH-AMERICAN CHELIPERIlSr.E 



organ ; but in neither case is any sexual difference observable (cf. text-figs. 72 & 73). 

 The Jiac/ellum consists always of three hairs. The palps are generally polished, and 

 granular only on the anterior surface. In addition to the usual fairly long, stiff, 

 pointed, and not completely simple hairs, very long slender and completely simple hairs. 



Text-figs. 72 & 73. 



Oh. macrochelatus Tom. Eight galea of <S and 2 . X 200. 



are present, viz., a single ventral hair on the trochanter in the middle ; on the femur 

 posteriorly a single hair in the middle and two terminal hairs of which the ventral is 

 the longer ; the tibia has two such hairs posteriorly in the middle, one more proximal 

 nearer the ventral margin, and one more dorsal nearer the dorsal margin ; the hand has 

 basally one of these hairs posteriorly and another ventrally, and beyond the middle a 

 single ventral hair. The fingers bear in addition to the usual twelve tactile hairs on 

 the immovable finger a single long and slender hair dorsally in the middle, and on the 

 movable finger two beyond the middle. All the above-mentioned hairs were only 

 observable in a few forms, but their fragility taken into consideration, I think we are 

 right in regarding them as constant within this subgroup. The fingers in some species 

 gape considerably in the male, and are provided with a very varying number of 

 accessory teeth, which are, however, always more numerous posteriorly than anteriorly. 

 The number of spots is variable, but is generally great, and anteriorly behind the two 

 basal " tactile " hairs of the immovable finger there are at least a few. 



The coxce are generally very similar to those figured of Ch. argentinus Thor., and are 

 in some degree sexually different (text-figs. 74 & 75). The legs bear, in addition to the 

 usual fairly long stiff hairs, very long and slender, most often completely simple hairs, 

 a single ventral one on the trochanter and trochantin, terminally a single one, not 

 always completely simple, dorsally on the femur, as well as a single one on the tibia, 

 somewhat beyond or behind the middle. The tarsal " tactile " hair is ^^ removed 

 from the base and about as long as the tarsus. The legs are fairly long and slender ; 



