284 IONE COENUTUS. 



coxae of the four anterior pairs of the pereiopoda 

 are round, and all attached to the antero-lateral 

 margin of the segments of the pereion. The 

 coxaa of the three posterior are the larger, and 

 produced posteriorly to a point. The pleopoda 

 are long, and fringed with arborescent branchiae. 



This is the only species known, besides that 

 taken by Colonel Montagu on the southern coast 

 of England. 



Length, male, ^ ; female, of an inch. 



Taken attached to the branchia of Callianassa 

 longimana. 



My mission in North-western America is ended. 

 The Hudson's Bay Company's steamer ' Labou- 

 chere ' takes us to San Francisco, where we spend 

 a very pleasant week, and I meet with many old 

 friends, whom I had encountered mule-hunting. 

 The mail-steamer takes us to Panama, where we 

 have to remain a short time, to await the arrival 

 of the English steamer at Colon. Panama has 

 been so often described, and is so frequently 

 visited nowadays, that any description of mine 

 would be a repetition of what others have 

 better said. 



I will content myself by saying we reached 

 home safely and in admirable health. If I have 



