37 



Holli joinls arc anteriorly near llu' dorsal margin provided with a loolh-shaped 

 eondylus, on each side of which the articulate niemhrane increases in breadth; 

 the distal |)ürtion of llie trochantin covers ventrally and posteriorly the base of 



the distal joint as well as a looth-shaped con- 

 tlvlus. As the condvli of the thus elablished 



Fifj. 4 1). Chclifer lanipropsalis L. K. 



X '.!>'). Left femur I ; « in anterior \ ie« , 



b in posterior view. 



a b 



Fig. 5. Chclifer subniher Sim. x 95. 



I. eft f'eimir I; a in anterior, b in posterior 



view. 



hinge-joint are placed obliquely to each other, the main movement is probably 

 a horizontal one (tig. 4 b a-h). 



The trochantin of Ch. siibrnber Sim. is scarcely half as long as the distal 

 part of the femur: the distal surface is almost perpendicularly cut ofl", and the 

 articulate cavity consequently faces outwards; the two coiidjli, each consisting 

 of a marginal tooth on the trochantin, are almost median and opposite to each other 

 (the posterior is placed a little more dorsally), the membranes 

 between the two joints are very narrow and the mobility 

 conse(|uently very limited; the movements are probably a 

 wriggle principally in the horizontal plan (fig. 5 a-b). 



The trochantin of Pseudochoridhim Thorellii n. sp. is 

 one third shorter than the distal femoral part as well as 

 a little deeper, the posterior and the anterior condyli are 

 placed in the middle and almost opposite to each other; 

 the articulate membrane between the two joints is very 

 narrow; I think that the movement is principally a vertical 

 one (fig. 6 a-b). 



In spite of the diflerences found in the described forms 

 of Cheliferinae Sim., there can be no doubt about the homology of their trochanlins, 

 for all intermediary forms are found between the extremities; the legs are similar 

 in all other respects and the animals stand nearlj' related to each other. 



Fig. (i. Pseudochiridium 

 Thorellii n. s|). x 9Ö in 

 anterior anil posterioi- view. 



