148 Bryant Walker 



HoRATiA MiCRA NUGAX (Pilsbry and Ferriss). 



Valvata micra nugax Pilsbry and Ferriss, Pr. A. N. S. P., 1906, p. 173, pi. 



IX, fig. 6. 

 Horatia (Hauffenia) micra nugax Pilsbry, Naiit., XXX, 1916, p. 83. 

 Type locality : Guadalupe River, New Braiinfels, Texas. 



Subfamily POMATIOPSIN^ Stinipson, 1865. 

 Genus POMATIOPSIS Tryon, 1862. 



PoMATiOPSis BiNNEYi Tryon. 



Pomatiopsis binneyi Tryon, Pr. A. N. S. P., 1863, p. 148, pi. I, fig. 10. 

 BythhieUa binneyi W. G. Binney, L. and F. W. Shells, III, 1865, p. 69, figs. 

 136-137- 

 This species is a true Pomatiopsis according to Pilsbry (96, p. 123 V 



Pomatiopsis californica Pilsbry. 



Pomatiopsis calif ornica Pilsbry, Naut., XII, 1899, p. 126. 

 Type locality : San Francisco, Cal. 



Pomatiopsis cincinnatiensis (Lea). 



Cyclostoma cincinnaticiisis Lea, Pr. Am. Phil. Soc, I, 1840, p. 289. 

 Amnicola sayana "Anthony" Plaldeman, Mon., 1844, p. 19, pi. I, fig. 11. 



This species having proved to be a Pomatiopsis, Lea's name takes pre- 

 cedence over that of Anthony which was proposed on the supposition that 

 the species was an Amnicola. 



Baker (4, p. 343) has erroneously attributed the species to Anthony and 

 his description, figures and synonymy are those of Amnicola cincinnaticnsis 

 Anth. 



Pomatiopsis hinkeHyi Pilsbry, Naut., X, 1896, p. 37. 

 Type locality : Black Falls, Florence, Ala. 



PoM.\TioPSis i.APiD.\RiA (Say). 



Pahidina htstrica Say, quoted as Amnicola lustrica by Haldeman and 

 authors generally and as Pomatiopsis lustrica by Binney according to Pils- 

 bry (89, p. 53) is the young of this species. 



Pomatiopsis robust.\ Walker. 



Pomatiopsis robusta Walker, Naut., XXI, 1908, p. 97, text-fig. 

 Type locality : J ackson Lake, Wyo. 



