Catai,ogu]5 Re;centi,y Described MolIvUSCa 147 



Subfamily LYOGYRIN^ Pilsbry, 1916. 

 Genus LYOGYRUS Gill, 1863. 

 Lyogyrus brow Nil (Carpenter), 



Amnicola brownii Carpenter, Central Falls (R. I.) Weekly Visitor, April, 



1872. 

 Valvata (Lyogynis) brownii Carpenter, Naut., Ill, 1889, p. 69. 

 Type locality: Cunliff's Pond, Elmville, R. I. 



The citation of this species from Minnesota by Sargent (115, p. 126) 

 is no doubt erroneous. 



Lyogyrus dalli Pilsbry and Beecher. 



Lyogyrus dalli Pilsbry and Beecher, Naut., VI, 1892^ p. 62. 

 Type locality : Wekiva River, Fla. 



Lyogyrus granum (Say). 



Paludina grana Say, J. A. N. S. P., II, 1822, p. 378. 



Amnicola granum W. G. Binney, L. and F. W. Shells, III, 1865, p. 86, fig. 

 170. 

 This species is known only from the Atlantic drainage in southeastern 

 Pennsylvania and New Jersey. Western records for it and L. brownii are 

 in all probability based upon some of the smaller species of Amnicola. 



Lyogyrus lElinerti Ancey. 



Liogyrus lehnerti Ancey, Con. Ex., II, 1887, p. 79. 

 Type locality : Potomac River, Washington, D. C. 



According to Pilsbry (87, p. 113) and part of the original lot in my col- 

 lection, this is a reversed Amnicola limosa Say. 



Genus HORATIA Bourguignat, 1887. 



Horatia Bourguignat, Etude sur les noms gen. des petites Paludinidees &c., 

 1887, p. 47. 

 Westerlund (163, 4th Supp., p. 23) remarks that these small shells have 

 the form of the smallest Pseudamnicolas, the structure of Lithoglyphus, the 

 color of many Bythinellas and are allied to the Valvatas in their oper- 

 culum. Typical Horatia is not represented in the North American fauna. 



Subgenus HAUFFENIA Pollonera, 1898. 



Hauffenia Pollonera, Boll. Mus. Zool. ed. Anat. Comp. Univ. Torino, XIII, 

 1898, p. 3. 



Horatia (hauffenia) micra (Pilsbry and Ferriss). 



Valvata micra Pilsbry and Ferriss, Pr. A. N. S. P., 1906, p. 172, pi. IX, figs. 



7-9- 

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

 Type locality : Guadalupe River, New Braunfels, Texas. 



