1902.] NATURAL SCIENCES OF PHILADELPHIA. 433 



au(l with a narrower umbilicus than V. vanattai, which is yellow 

 and less fragile. 



V. dinrjmani was drawn on a smaller scale than the other species 

 on the plate. 



Zonitoides arboreus (Say). 



Paint Rock, on both sides of the river, Bluff mountain ; Mitchell, 

 Cat-tail, Wilson's, Tyson's, Potato Top and Ivy river. In Tyson's 

 Cove this species was found in great abundance. It was also com- 

 mon on Potato Top. Elsewhere it seemed to be comparatively rare. 



In addition to the more obvious differences between this species 

 and Vitrea hammonis, Z. arboreus under a glass of high power will 

 be found to have the surface covered with numerous very fine, 

 impressed revolving lines which are lacking in hammonis. 

 Zonitoides elliottii (Rediield). 



Common at Paint Rock, on both sides of the river, and at 

 Tyson's. A few were also taken on Bluff mountain and a single 

 specimen in AYilson's Cove, Mt. Mitchell. 

 Gastrodonta intertexta (Biuu.). 



Not taken in 1901. It occurs, however, at Asheville, where it 

 was found by Walker on a previous visit. 

 Gastrodonta acerra (Lewis). 



Paint Rock, Mt. Mitchell, Cat-tail, Tyson's, Potato Top, 

 ^Meadow Cove, Ivy river and Toe river. 



Apparently not as abundant in this region as it is either at Roan 

 or in the Smoky mountains. It was more numerous in tlu; Mt. 

 Mitchell region than 'around Paint Rock and Bluff mountain. As 

 usual in any considerable suite of specimens, there is considerable 

 variation in the height of the spire. Those from Cat-tail were 

 unusually fine, the largest examples of the two forms measuring 

 17.^ X 14 and 16| x lU mm. 

 Gastrodonta demissa (Biun.). 



Not taken in 1901 . It has been found on Town mountain, near 

 Asheville, by Walker. 

 Gastrodonta suppressa (Say). 



This species did not occur in the collection of 1901. It has, 

 however, been found at Asheville, on Town mountain (coll. 

 Walker). It was also found at Spencer's Cabin on Thunderhead in 

 1899, but was overlooked at tlio time of making the report. 



