4 (3) 



Spines 



4 (3) Fingers of chelae slender, usually as long or 

 longer than palm; without large spines on sole 

 of propodus 



5 (-4) Auxiliary claws one-half to two-thirds as long as terminal claw. . . 



Nymphon macrum 



5 (4) Auxiliary claws less than one-fourth as long as terminal claw 6 



(5) Neck short (a) ; chelae with more than 

 25 large spinules on each finger (b). ... 

 Nymphon stromi 



neck 



6 (5) Neck long, slender (a); 

 chelae with 25 or less spi- 

 nules on each finger (b); 

 tarsus at least one and a 

 half times as long as prop- 

 odus (c) Nymphon longitarse 



