90 STALK-EYED CRUSTACEA 



4. Mithrax (Mithrax) aculeatus. 



Mitlirax aculeatus . . H. Milne Edwards, Stimpson, 



Herbst, Desbonne and 

 Schramm, Von Martens. 



Cancer aculcatiis . . Herbst. 



The carapace, contracted in front and with large spines 

 on its edge, has a raspberry appearance, due to a coating 

 of small circular and flat granulations placed between the 

 spines. It is covered with short hair. The spines on the 

 lateral border are very sharp ; the anterior ones are often 

 double or triple, especially in specimens of large size. 

 The fourth joint of the external maxillipedes is deeply 

 notched at its internal angle. The pincers of the male 

 are large. In young specimens the tubercles on the hand 

 may be w^anting. The arm and forearm are very spiny. 

 There are spines on the walking legs. 



Colour, a violet brown. The pincers of the male are 

 flesh - coloured ; those of the female, brown or white, 

 spotted with violet. The ends of the pincers are white. 



Range. — Guadaloupe, Barbados, St. Thomas, Aspin- 

 wall, Cuba, Vera Cruz. 



5. Mithrax (Mithrax) hispidus. 



Mithrax Jdspidus . . . Milne Edwards, Guerin, 



Gibbes, Saussure, Stimp- 

 son, Smith, Desbonne 

 and Schramm. 



Cancer hispidus .... Herbst. 



Maia spinicincta . . . Lamarck. 



Mithrax spinicinctus . . Desmarest. 



The carapace is curved, wider than long, smooth and 

 glabrous ; it has some knobs which become pointed upon 



