STALK-EYED CRUSTACEA gi 



the metabranchial lobe. The front is wide, httle advanced. 

 The prsorbital spines reach the level of the notch which 

 separates the rostral horns. The orbital border has four 

 small tubercular projections, of which one forms the 

 external orbital angle ; the two which occupy the inferior 

 orbital border are larger than the teeth of the superior 

 border. The lateral edge of the carapace has five spini- 

 form teeth ; the first is obtuse and often bifid ; the second 

 is bifid, sharp, and curved forwards ; the third is thin ; the 

 fourth is the same ; the fifth is smaller and placed higher 

 up upon the border of the carapace. The hepatic region 

 has two tubercles. Other tubercles, more or less pointed, 

 exist on the under surface of the cephalo-thoracic bucler. 

 The horns of the rostrum are short, straight and obtuse 

 at their extremities ; at their base and above there are 

 two small tubercles. The internal tooth of the basal joint 

 of external antennae is large, and scarcely less prominent 

 than the rostrum ; there is a second shorter blunt point 

 outside this one. The fourth joint of the external maxilli- 

 pedes has its internal angle notched for articulation with 

 the fifth. The pincers are smooth ; the forearm is 

 unarmed ; the arm has spines above. The walking legs 

 are hairy ; there are spines on their terminal joint. 



Range. — Guadaloupe, Martinique, Cuba, Florida, 

 Brazil. 



6. Mithrax (Mithrax) depressus. 



MitJirax depressns . . A. Milne Edwards. 



This species is the same as MitJirax {Mithrax) pleuro- 

 canthus, except that the carapace is longer, flatter, and less 

 embossed than in the latter. The antero - lateral edges 

 are less swollen and longer. 



Range. — Guadaloupe, Florida. 



