142 Branley A. Branson and Donald L. Batch 



collection (1964) from the Licking River at Butler, a dam has started 

 releasing very cold water through the habitat. In the spring of 1981 we 

 were unable to find a single specimen of this handsome little snail at the 

 locality. The species is listed as Threatened (Branson et al. 1981). 



Goniobasis semicarinata (Say). Collections: 3 (7), 8 (17), 9 (2), 10 

 (31), 15 (31), 17 (14), 22 (32), 23 (12), 26 (30), 27 (8), 33 (2), 34 (45), 37 

 (1), 38 (9), 40 (1), 42 (7), 43 (49), 44 (1), 45 (51), 46 (21), 48 (35), 49 (1), 

 50 (6). This is the characteristic pleurocerid of the entire Kentucky and 

 Licking River drainages, as well as of the Upper Salt River Drainage. 

 Although not formerly reported from the Cumberland River drainage, 

 there are many populations of pleurocerids there (particularly in the 

 Little South Fork and the Rockcastle River) that are not separable by 

 means of shell characteristics from those of the Licking and Kentucky 

 rivers. 



Goniobasis costifera (Haldeman). Collections: 11 (13), 12 (9), 13 

 (15), 14 (1), 25 (24), 36 (1), 41 (3). This species is only locally abundant 

 in the Kentucky River drainage (Branson and Batch 1981). 



Viviparidae 



The distribution of viviparids is extremely poorly known in Ken- 

 tucky, and practically nothing has been added since the papers of 

 Clench (1962a, b), Clench and Turner (1955), and Clench and Fuller 

 (1965). Two genera and three species are reported here. 



Lioplax subcarinata occidentalis Pilsbry. Collections: 30 (1), 45 (1). 

 The habitat at both sites was mud and rocks with rooted vegetation. 

 Clench and Turner (1955) considered this a synonym of L. sulculosa 

 (Menke). 



Campeloma integrum (Say). Collections: 8 (3), 45 (1). This species 

 was taken from mud at the base of water willow along the margins of 

 riffles. 



Campeloma crassula Rafinesque. Collections: 11 (1), 17 (3), 24 (1), 

 48 (1). Some of the older literature reported this species as C. ponderosa 

 (Say). 



Hydrobiidae 



Pomatiopsis lapidaria(Say). Collections: 3 (1), 6 (1), 16 (2), 19 (1), 

 25 (3). Although most authors consider this species amphibious, the 

 specimens from Station 16 were removed from dead leaves in the water. 

 The others were found at the water's edge on wet soil and rocks. 



Pulmonata: Basommatophora 



Other than the exceptions noted below, we basically follow the 

 classification scheme of Taylor and Sohl in the Basommatophora. 



Lymnaeidae 



We follow the rationale of Hubendick (1951, 1978) in our treatment 



