124 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Remarks, The species is established essentially on the very large male, the 
mouth parts of which are very different from those of other forms known to 
me. I hope that it will prove to be rather easy to recognize the form, but I 
hesitated to establish the new genus, the knowledge of the female being very 
incomplete. However, I found it impossible to refer the species to any of the 
genera hitherto published. 
ONISCID Ai. 
15. Porcellio levis Latr. (1804). 
I will only refer to the account in G. Budde-Lund’s Crustacea Isopoda Ter- 
restria, 1885, which is the principal work on the Oniscide ; the author (pp. 138- 
140) describes the species, presents an enormous quantity of synonymy and 
references to earlier authors, and adds a very long list of localities for this 
almost cosmopolitan form. 
Habitat. Chatham Island, Galapagos (March 29, 1891), four specimens (de- 
termined by G. Budde-Lund). 
ZOoÖLOGICAL MUSEUM, COPENHAGEN, 
September 16, 1897. 
