the aid of the above mentioned muscle of being doubled upon 

 the anterior face of this part, is somewhat shorter and much 

 narrower, consisting of only 4 joints. The 2 first of these joints 

 are by far the largest and about of equal length, whereas the 

 2 outer joints are rather small and of the same structure as in the 

 female. The 2nd, or antepenultimate joint is produced at the 

 end anteriorly to a strong, somewhat upturned spiniform process,, 

 and bears posteriorly 2 slender setae. 



The last pair of legs (fig. 3) considerably differ from those 

 organs in the female and are also highly assymetrical, the right 

 leg being much the larger. On both legs, however, the same 

 principal parts as in the female may be easily distinguished, 

 though rather much modified in structure. The 2nd segment of 

 the basal part is in both legs considerably larger than the 1st, 

 of oblong form and provided at the outer edge with a very 

 delicate bristle. Of the two rami the inner is in both legs 

 very small, forming a simple conical process without any armature. 

 The outer ramus is very different in the two legs, that of the 

 right being very large and powerful and consisting of 3 well- 

 marked joints, the last of which has the form of a very slender 

 claw. The 1st joint of this ramus is rather short, broader than 

 it is long, and projects at the end exteriorly in a spiniform 

 corner. The 2nd joint is rather compressed, of a broad oval 

 form and armed with a strong spine attached to a well-marked 

 ledge of the outer edge at some distance from the apex. The 

 apical claw is very movably articulated to the extremity of the 

 preceding joint and nearly as long as the whole leg. It is 4«* 

 smooth, terminating in a sharp point, and exhibits a pecflKtf 

 almost sigmoid curvature. The outer ramus of the left leg * 

 very small, scarcely as long as the outer segment of the ba. 

 part and does not exhibit any distinct segmentation. It i s h0 *" 

 ever rather complicate in structure, jutting out at the end in 

 2 digitiform and finely ciliated processes, besides, on the 

 side, a thin rounded lamella, likewise finely ciliated at *j 

 edge. In connexion with the inner ramus, the terminal P» rt 

 this leg constitutes a sort of complex chela, by the aid o 



