176 STALK-EYED CRUSTACEA 



I, Neptunus (Neptunus) sayi. 



Neptunns sayi . . A. Milne Edwards, Stimpson,Miers. 

 Lupa sayi. . ... Gibbes, Dana, Stimpson. 

 Lupa pelagica . . Dekay, Say. 

 Portunus pdagicns . Bosc. 



Carapace convex, marbled, smooth. Lateral epibranchial 

 spine short. Front divided into s;x teeth, of which the two 

 median are almost equal to the lateral. The first pair of 

 legs has the fourth joint long and thin, with four spines 

 on the inner border ; there are no spines upon the posterior 

 margin ; the fifth (carpus) has two spines ; one upon the 

 antero-internal angle and the other upon its external face ; 

 the hand has smooth crests, and above two spines ; one 

 upon the internal border above the articulation of the 

 movable finger, the other upon the external border above 

 the articulation of the fifth joint. The fourth joint of the 

 external maxillipedes is very little notched on the inside. 



Range. — Gulf weed, Guadaloupe. 



2. Neptunus (Neptunus) cribrarius. 



Neptunus cribrarius . . Lamarck, A. Milne Edwards. 



Portunus cribrarius . . Lamarck. 



Lupa cribraria . . . . H. Milne Edwards. 



Arenceus cribrarius . . Dana. 



Carapace wide, almost completely smooth. Teeth of 

 the antero-lateral border pointed and wide at their base ; 

 the anterior are slightly smaller than the posterior. 

 Lateral horns directed outwards. Front cut into six teeth, 

 the two median fine and long, the intermediate very short, 

 connected with the preceding, of which they appear to 

 be a reduplication. The inferior orbital border is divided 

 into three lobes by two wide fissures ; the middle lobe is 



