144 THE NAUTILUS. 
370. SuccinEA OREGONENSIS Lea. San Diego to Oregon; Utah; 
[daho. . 
370a, SUCCINEA OREGONENSIS GABBI Tryon. Utah, Wyoming, 
eastern Oregon. 
371. SuccrNEA RuSTICANA Gld. Oregon, Cal., Nevada. 
372. SUCCINEA STRETCHIANA Bld. Nevada, Idaho, Cal. 
373. SUCCINEA GROENLANDICA Beck. Greenland. 
(Laute.) 
374. SuccingeA 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. 8. chrysis occurs also on the 
Siberian side of the strait. 
Suborder Teletremata Pilsbry. 
Family VAGINULIDE. 
Genus VAGINULUS Fér. 
375. VAGINULUS FLORIDANUS Binn. Florida Keys, Charlotte 
Harbor and Punta Rassa. 
VAGINULUS ? Lobitos, Cal. (Stearns, as V. olivacea). 
[ Nore.—tThe family Onchidiide belongs to this suborder, but as 
its species are not really terrestrial in habit, it is omitted from this 
list of land snails. The Auriculide, and especially Carychium, 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 Mo.uusca, 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-Linnzan authors to the present time, with a list of 
mollusean 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. 
