144 THE NAUTILUS. 



370. SUCCINEA OREGONENSIS Lea. San Diego to Oregon ; Utah ; 

 jdaho. 



370a. SUCCINEA OREGONENSIS GABBI Tryon. Utah, Wyoming, 

 eastern Oregon. 



371. SUCCINEA RUSTICANA Old. Oregon, Cal., Nevada. 



372. SUCCINEA STRETCHIANA Bid. Nevada, Idaho, Cal. 



373. SUCCINEA GROENLANDICA Beck. Greenland. 



(Lautce.*) 



374. SUCCINEA CHRYSIS Westerl. Port Clarence, St. Michaels 

 and Kadiak, Alaska. 



374a. SUCCINEA CHRYSIS AURELIA Martens. Port Clarence, 

 Alaska. 



374b. SUCCINEA ANNEXA Westerl. Port Clarence, Alaska. 

 These three are probably mere variations of one species. They be- 

 long to an Asiatic group of the genus. S. chrysis occurs also on the 

 Siberian side of the strait. 



Suborder Teletremata Pilsbry. 

 Family VAGINULID.SJ. 



Genus VAGINULUS Fer. 



375. VAGINULUS FLORIDANUS Binn. Florida Keys, Charlotte 

 Harbor and Punta Rassa. 



VAGINULUS ? Lobitos, Cal. (Stearns, as V.olivacea). 



[NOTE. The family Onchidiidce belongs to this suborder, but as 

 its species are not really terrestrial in habit, it is omitted from this 

 list of land snails. The AuriculidcB, and especially Caryehium, and 

 Pomatiopsis lapidaria, might with greater propriety be included ; 

 but it has been thought best to omit them.]. 



UPON THE PRINCIPLES OF NOMENCLATURE AND THEIR APPLI- 

 CATION TO THE GENERA OF RECENT MOLLUSCA, by J. Cosmo 

 Melvill; being the Presidential Address delivered before the Con- 

 chological Society of Great Britain, September 19, 1896. This ad- 

 dress embodies a very readable sketch of the history of nomenclature, 

 from the pre-Linnsean authors to the present time, with a list of 

 molluscan genera about the names of which difference of opinion 

 exists, observations upon the nomenclature of certain genera, and 

 suggestions for the betterment in the future of the existing condi- 

 tion of the subject. 



