178 STALK-EYED CRUSTACEA 



which are short and concave. The surface is unequal and 

 downy. The antero-lateral teeth are very small and sharp ; 

 the lateral horn is thin and long. The front is little 

 advanced ; the two median teeth are very small, the inter- 

 mediate wider and larger ; the internal orbital angles are 

 rounded. 



The first pair of legs is weak ; the fourth joint has in 

 front four small very curved spines ; there is a spine upon 

 the external angle. The fifth has two spines ; the hand 

 has three; one below the articulation with fifth joint; the 

 two others, very close, occupy the extremity of the superior 

 border. The walking legs are thin. The fourth joint of 

 the last pair is short and has no spines ; its terminal joint 

 is long and oval. The sternal plastron is completely 

 smooth. 



The abdomen of the male is triangular. 



Range. — West Indies, Cuba. 



4. Neptunus (Amphitrite) ventralis, 



NeptiDius ventralis . . A. Milne Edwards. 



The carapace moderately wide ; it is covered with short 

 down, in the midst of which the granulations lift them- 

 selves from the projecting parts of the carapace. The 

 front is a little advanced. The two middle teeth are a 

 little smaller than the lateral ; the internal orbital angles 

 are rounded. The antero-lateral teeth, very granular at 

 their base, are small and thin, with the point directed 

 forwards. The lateral horn is as long as the space 

 occupied by the three last of these teeth. 



The pterygostomian regions are covered with hairs 

 which hide the granulations. The fourth joint of the 

 external maxillipedes is a little advanced. 



The legs of the first pair of the female are short ; the 



