1877.] CRUSTACEA, CHIEFLY FROM SOUTH AMERICA. 655 



Ihe original specimen of Peti«r was from the West Tn,lr.. i . 

 h,s.fig,.. ,s no. sufficient,, acontate to be avaiil'^tlpSi' 



Acanthonyx debilis, Dana. U S Evnl Pvr. ^iv, r^ . ■ 



Neptunus, De Haan. 

 Neptunus anceps. 



Lupea anceps, De Saussure, Rev. et Map- 7nnl /-.' ox • 

 p. 502(1857); Mem. Soc. Phys et Hist nS cl^' ^ ■ ^) '''• 

 2) p. 434, pi. ii. fig. 11 (1858) '*• ^'"'^'' ^'^- ^P^-"' 



p. ^1 Osir"'''' ""• '"■■'''"• ""'"" ^"'^" ^'^'''- Hist. Nat. X. 

 Hab. Martinique. 



orbital spine. In very young specimens of this genus howeler 

 .t IS no uncommon to find one or two additional spnes' upon the 

 antero-lateral margins. There is, according to De Saussure a second 

 spine at the distal extremity of the superior margin o? tt hanS 



43* 



