i8o STALK-EYED CRUSTACEA 



each side, behind and above the base of the swimming 

 feet, there is a circular red spot. Antero-lateral edges are 

 armed with eight similar teeth, succeeded by a lateral 

 horn, sharp and curved forwards. The front is cut into 

 six sharp and very large teeth ; the middle ones are more 

 advanced than the intermediate, which are separated from 

 the external by a wide and deep notch ; these last teeth 

 are sharp. The superior orbital border is divided by two 

 fissures. The epistomian apophysis does not exceed the 

 front. The fourth joint of the external maxillipedes is 

 very deeply notched inside. 



The legs of the first pair are long and thin. Fourth 

 joint armed with five or six long and bent spines on its 

 anterior edge, and with a spine at the extremity of its 

 posterior border. The forearm has projecting ridges, and 

 two spines ; one on the antero-internal angle, the other on 

 its external face. The hand has granular ridges, and 

 three spines; one above the articulation of the fifth joint, 

 the other two on the upper surface at its extremity. The 

 other legs are thin ; there is a strong spine, directed 

 upwards, above the articulation of the haunch of the 

 swimming feet. The fourth joint of this last has at the 

 extremity of the inferior border a spine. 



Abdomen of the male is triangular. 



Range. — Martinique, Mexico, Brazil. 



7. Neptunus (Amphitrite) ordwayi. 



Neptunus ordwayi . . A. Milne Edwards, Stimpson, 



Smith. 

 Neptunus cruentatus . A. Milne Edwards. 



Carapace wide, and very finely granular on its pro- 

 jecting parts. Upon the gastric region, towards the 



