210 PROCEEDINGS OF THE ACADEMY OF [1889. 



Family xiii. ONCHIDIICEi. 

 Genus xxxi. ONCHIDIUM Buchanan, 1800. 



300. Onchidium carpenteri W. G. Binney. Sts. of Fuca to 



Gulf of Cal. 



301. Onchidium floridantjm Dall. Knight's Key, Florida. 



Genus xxxii. ONCHIDELLA Gray, 1850. 



302. Onchidella borealis Dall. Alaska to Vancouver Id. 



