No. 2] SNAILS OF THE GENUS 10— ADAMS. , 21 



Lot 97. Chissolms Ford, Biirem, Hawkins County, Tenn. Collected by David Hayes during 

 the latter part of September, 1900. Greenville sheet. This and lot 98 are remarkable for con- 

 taining smooth, spiaose, and shells which are both smooth and spiaose. 



Lot 98. Same locahty as above and about the same date, collected by David Hayes. About 

 23 miles below Rotherwood. 



Group 16. Lot 87. Rogersville, Tenn. About 2 miles south of town, from a shoal below 

 the Southern Railway bridge. September 26 and 27, 1900. This is a bowldery shoal with rock 

 bottom. The shells were much more abimdant upon the bowlders than upon the rock bottom. 

 Both smooth and spiaose shells occur here on the same shoal. Rather young shells were also 

 found here. Morristown sheet. 



Lot 88. Rogersville, Tenn. From the shoals above the Southern Railway bridge, near the 

 mill . Not so abundant on the flat rock surfaces as below the bridge, lot 87. September 28, 

 1900. About 39 miles from Rotherwood. 



A very remarkable feature of theRogersviUe shells is the abim.dance of the sxaooth. fiuvialis ( ?) 

 type of shells, after their scarcity or absence between this group and the intervening river up to 

 lot 111, Holston Bridge, Va., about 48 miles upstream. A few smooth shells are also found in 

 lot 90. The abundance of these shells, elsewhere found in headwaters only, is certainly remarka- 

 ble, as is also the character of the iutergrading forms. 



Geoup 17. Lot 90. Cobb Ford, Tenn., between Three Springs and Mooresburg. Sep- 

 tember 28, 1900. Morristown sheet. On the ford, where the water was about ankle deep, the 

 younger shells largely occured. A httle farther upstream, where the water was about knee- 

 deep, the current was swifter and large shells were found imder the edges of the large bowlders. 

 This is a series oi about 400 shells. 



These shells are remarkable for the large number of moderately small individuals and the 

 very smaU number of smooth, Jluvialis shells. This locality is about 14 miles below Rogers- 

 ville, yet the character of the shells has greatly changed toward the spinosa type. This locality 

 is 53 miles below Rotherwood. 



Group 18. Lot 96. Holston Station, Tenn., 4 miles north of Morristown. From Long Ferry 

 to about one-fourth of a mile below the railroad bridge. Abundant. September 10 and 11, 1900. 

 In moderately quiet water. About 13 miles below lot 90. There was much algal growth on the 

 boulders. Most of the lo were taken on the quiet, shallow, and inner sides of the bend of the river, 

 about 66 miles from Rotherwood. The original number of shells in this lot was 343. The indi- 

 viduahty of this lot, particularly with regard to height of spines, was such as to warrant its 

 separate grouping. There was one smooth shell ia this lot. These shells are the form spinosa. 



Supl. lot 91. Strawberry Plains, Tenn., Gait Island, about 3 J miles upstream from the sta- 

 tion to the town, including the shoal at a fish trap and a small island above town. September 

 29, 1900. About 25 miles above KJaoxville and about 121 miles from Rotherwood. A series 

 of 13 shells, apparently spinosa and londonensis. 



At McBees Ford, northeast of Strawberry Plains, several shoals were examined, particu- 

 larly those west of McBees Island, but no shells were found. About 35 rmles above Knoxville 

 and about 110 miles from Rotherwood. 



Supl. lot 123. Dopes Bar, 15^ miles above Knoxville iu the Holston River. Collectors, Sam 

 George and Henderson. September 25, 1901. About 130 miles below Rotherwood, and about 

 10 rmles below lot 91. These shells appear to be loudonensis. 



Supl. lot 203. Boyds Shoal, Holston River, about 5 J mUes above Knoxville, Tenn. Novem- 

 ber 16, 1900. Collector, Sam George. This is near the mouth of the Holston. 



From the confluence of the North and South Forks of the Holston at Rotherwood to the 

 mouth of the Holston it is about 141 miles. 



4. NOLICHUCKY. LOWER FRENCH BROAD, AND TENNESSEE RIVERS. 



a. Nolichucky. 



The Nolichucky is formed by the confluence of the Caney and North Toe Rivers in the 

 mountains of North Carolina, a short distance southwest of Roan Mountain. (Cf. Roan Moim- 

 tain sheet.) This moimtain stream at the time of heavy rains becomes a raging torrent. When 



