U. S. NATIONAL MUSEUM 



BULLETIN 36, PL. XXXVIII 



Fig. 1. Orcella hrevirostris iOwen). 

 (From Van Beneden and Gervais, Osteographie des C^tacls, 1868-79, p, 552.) 



Fig. 2. Orcella brevirostris (Owen). 

 (.Fronn Owen, Transactions of the Zoological Society of London, vi, 1859, pi. 9, fig. 3.) 



Genus ORCELLA. 



