STALK-EYED CRUSTACEA 183 



The abdomen of the male is triangular, lanceolate, 

 with a wavy edge. 



The ground colour is buff, with the elevations on 

 the carapace, the crests on the hands, fingers and 

 legs red ; the upper surface of the fourth joint of the 

 first pair and their spines are marbled with the same 

 colour— red. 



Range. — Barbados, Martinique, South Carolina, 

 Mexico, Brazil, Chili. 



9. Neptunus (Achelous) depressifrons. 



Neptiuius depressifrons . . Stimpson, Miers. 

 Amphitrite depressifro7is . . Stimpson. 

 Achelous depressifrons . . Stimpson, A. Milne Ed- 

 wards. 



Carapace convex posteriorly as far as its middle, 

 depressed towards the front and the antero-lateral borders ; 

 surface finely granular. Antero-lateral borders cut into 

 nine equal teeth. The superior orbital border is divided 

 by two fissures. The front is cut into six teeth. Of the 

 legs of the first pair, the fourth joint has a small spine at 

 the extremity of its posterior border, and five spines in 

 front. Fifth joint has a long spine, thin and sharp 

 at its antero - internal angle, and a small spine on its 

 external face. The hand has, above, a prominent 

 ridge, armed with two small spines ; one above the 

 articulation of the fifth joint, the other above the 

 base of the movable finger. Surface finely granular. 

 Walking legs thin ; the fourth pair more swollen than 

 the third. 



Abdomen of the male is subtriangular. 



Range. — Bermuda, South Carolina, Florida. 



