44 STALK-EYED CRUSTACEA 



I. Acanthonyx petiverii. 



Acanthonyx petiverii .... A. Milne Edwards, 



Miers, Bell, Dana, 

 Smith, Von Mar- 

 tens, Dcsbonne and 

 Schramm. 



Acanthonyx cniarginatus . . . Milne Edwards and 



Lucas. 



AcajitJionyx debilis Dana. 



AcantJionyx concameratns . . Kinahan. 



Cancer innricatus coinprcssnvi . Petiver. 



The lateral edge of the carapace is armed with three 

 teeth, of which the anterior is very large, flat, rounded, 

 and not curved in front, and of which the two posterior 

 are very small and obtuse ; there are no spines at the 

 external angle of the orbits ; the teeth of the anterior 

 orbital angles are strong and elevated. The rostrum is 

 flat and terminates in two little teeth more or less sharp. 



The first pair of legs in the male is strong ; the hand 

 has straight edges. The fingers are scarcely toothed, 

 and meet only at their extremities when closed. The 

 forearm has a ridge outside. The arm has a tubercle 

 near its base. The walking legs are compressed. 



The fourth and fifth segment of the abdomen, in the 

 male, are soldered together. 



Range. — Guadaloupe, Brazil, California to Chili, Gala- 

 pagos Islands. 



Subfamily IV. Microrhynchinae. 



MicrorJiyncJdncz . . Miers. 



Carapace more or less triangular and convex. Ros- 

 trum simple, or more or less bifurcated. Eyes short and 



