AMERICAN SPECIES OF VERTIGO. 99 



It is related to V. pygmaa, but the crest behind the lip is 

 not so strong, the whorl is more flattened or impressed at and 

 behind the point or "auricle" of the lip, giving the latter the 

 appearance of being biarcuate, though it is not as conspicu- 

 ously so as Binney's description would lead one to suppose. 

 The surface is very distinctly striate, especially the penult 

 whorl. The basal plica is subcolumellar in position. The 

 parietal lamella is strong and rather long. There is never any 

 trace of a palatal callus. 



"The angular lamella may be present or absent. The 

 inferior columellar (basal) is by no means constant, and in 

 some forms is generally wanting. In a few specimens from 

 Summit Co., Ohio, there is a very small but distinct infra- 

 parietal nodule ; one of these has an angular also, and is thus 

 7-toothed. The palatal folds are rather variable in position 

 and shape, and there may be a well marked external im- 

 pression over them, or none" (Sterki). 



V. gouldii is rather commonly distributed in New England 

 and New York, but more local southward, where it appears 

 to follow the mountains to Tennessee and northern Alabama. 

 The Pleistocene form from Kansas, as figured by Hanna and 

 Johnston, differs so much in the position of the basal fold 

 that its reference to gouldii appears doubtful. So far as I 

 know, there is no Austroriparian record, so that the West 

 Indian occurrence appears anomalous, and requires confirma- 

 tion. Dr. Sterki states that it is found in Cuba and Jamaica, 

 and single specimens of this species are in coll. A. N. S. P. 

 labelled St. Croix (Griffith), and Tortola (R. Swift). While 

 these localities appear improbable, the high degree of accuracy 

 of the Swift collection labels causes me to mention them. The 

 possibility of importation or mixture of specimens must be 

 considered. 



10a. Vertigo gmtldii paradoxa Sterki, n. subsp. PI. 12, figs. 



6, 8. 



' ' Rather small, generally cylindrical, with the surface striae 

 well developed, the palatals, usually somewhat long and thin, 

 are close together, and the lower palatal is placed markedly 



