STALK-EYED CRUSTACEA 



8. , Neptunus (Achelous) spinimanus. 



Neptiams spiniinauus . Miers. 



Achelous sp'uiiuiaiius . A. Milne Edwards, De Haan, 



Leach, Stimpson, Smitli. 

 Portiinus pdagicHS ^ 

 PortiDiiis spiiiiuianiis] 

 Liipa spiiiimana . . Desmarest, H. Milne Edwards, 



Stimpson, Dana. 



Latreille. 



Carapace broad in old individuals, more wide in the 

 young, embossed ; projecting parts covered with granula- 

 tions. Antero-lateral edges armed with nine teeth of an 

 equal size, except the last, which, in the young, is longer 

 than the others ; but by age the difference in size 

 diminishes more and more. Front advanced and cut into 

 eight teeth, the two middle the most projecting, and 

 directed forwards, those of the second pair a little shorter, 

 directed outwards and separated from the next by a deep 

 notch. The next short and scarcely separated from the 

 last. The superior orbital border is divided by two 

 fissures. Epistomian apophysis is not projecting. Fourth 

 joint of external maxillipedes, very long, is slightly 

 notched in front. The legs of the first pair very large, 

 especially in the male. The fourth joint has on its 

 anterior border four strong spines, and at the extremity 

 of its posterior border a small spine. Fifth has two 

 spines, one at the antero-internal angle, the other on its 

 external face. Hand has granular keels, armed above 

 with two spines ; one above the articulation of the fifth 

 joint, the other about the anterior third of the internal 

 border of the upper surface. Walking legs long and 

 compressed. Fourth joint of swimming legs short and 

 wide. 



