STALK-EYED CRUSTACEA 153 



The first pair of legs, strong, has the tips of the fingers 

 not excavated. 



The abdomen of the male has seven free joints. 



Range. — West Indian Sea, Brazil, Mexico, Panama. 



I. Menippe mercenaria. 



Menippe mercenaria ... A. Milne Edwards. 



Cancer niercenarms . . . Say. 



Pseudocarchnis ocellatus . . H. Milne Edwards. 



Pseudocarcimis viercenariiis . Gibbes. 



The carapace is curved and smooth ; seen under a 

 magnifying glass the surface appears finely granular. 

 The protogastric lobes are slightly raised above the 

 general surface. The front is slightly sloped and formed, 

 independently of the internal orbital angles, of two large 

 lobes, separated in the middle line by a triangular notch ; 

 their contour is bowed and indistinctly trilobed. The 

 orbital borders are thick and almost entire ; there are, 

 above, the traces of two superficial fissures. The external 

 orbital angle is not prominent. The antero-lateral edges 

 are cut into four lobes, of which the two first do not 

 exceed the contour of the carapace; the third is dentiform 

 and larger than the fourth, which is pyramidal. The 

 first pair of legs very large and of unequal size ; the 

 surface is smooth ; on the inside of the large hand there 

 are fine inequalities, which are capable of producing a 

 noise when rubbed against the rough pterygostomian 

 region. The walking legs are robust, and hairy towards 

 their extremities. 



The body is reddish, with darker round spots ; the legs 

 have red and yellow bands ; the tips of the fingers are 

 black. 



Range. — West Indies, Cuba, Florida. 



