34 SMITHSOXIAX MISCELLANEOUS COLLECTIONS 



ONCINOPID.^ 



Genus OXCINOPUS De Haan 



40. ONCINOPUS SUBPELLUCIDUS ' Stimpson 



Oncinopus subpelliicidiis Stimpsox, Proc. Acad. Xat. Sci. Phi!a., ix. p. 

 221 [28]. 1857- 



This species is of a soft structure and somewliat translucent in 

 life, the shell being very thin. Surface everywhere pubescent. 

 Color yellowish-brown. 



It is verv closely allied to O. araiica De Haan, but seems to differ 

 in the more slender penultimate joints of the first and second pairs 

 of ambulatory feet ; the hair on the feet generally is much longer ; 

 the rostrum is more deeply emarginated, and the carapax is more 

 expanded at the hepatic regions behind the eyes. From O. iicptitnus 

 Adams and White it differs in the more slender terminal and pciuil- 

 timate joints of the ambulatory feet. 



The dimensions of a male are : Length of carapax, 0.48 ; breadth 

 posteriorly, 0.36; length of ambulatory foot of first pair, 1.45 inches. 



Found on soft sponges dredged from a muddy bottom, in 6 fath- 

 oms, in Port Jackson, Australia. 



CA\XR01DEA 



cancrid.f: 



Geniis CAXCER (Linmeus) Leach 



The reasons given by r>ell- for following Leach in applying the 

 Limiaean name for all crabs to the group called Platycorciinis by 

 Milne Edwards are good, and the name is thus used bv most recent 

 carcinologists. 



The geographical range of the genus is in the cold temperate zone, 

 and not the "hotter parts of America," as stated by Bell. The spe- 

 cies are mostly American, two being found on the northeastern coast 

 of the United States, four on that of Oregon and California, and 

 three on that of Chili. Of the two other known species, one in- 

 habits the shores of Great Britain, the other those of New Zealand. 



'Oncinopus aranea (De Haan). 

 ' Trans. Zool. Soc, i, 332. 



