1 82 Bryant Wai^kkr 



Lampsilis cracflis Barnes. 



This species has been identified by Frierson (42, p. 7) and others as the 

 Unio fragilis Raf. (1820) and L.asmonos fragilis Raf. (1831) and either of 

 these names, if identifiable from the original description, would have prior- 

 ity. The example under this name in the Poiilson collection according to 

 Vanatta fi.io, p. 552) is gracilis Bar. 



Fragilis Raf. (1831) is the monotype of his genns Lasmonos. 



Lampsilis IRIS (Lea). 



Is a Micromya according to Ortmann (79, p. 341). 



LaMPSIIvIS LEPTODON (Raf.). 



Unio shepardianus f. duttonianus De Gregorio, Moll, di aq. dul. di Amer., 

 1914, p. 25. 

 This species is the tvpe of Leptodea Raf. bv designation (Frierson, 42, 

 p. 6). 



LampsiIvIS lienosa (Con.). 



Is a Micromya according to Ortmann (79, p. 340). 



Lampsius ijgamentina (Lam.). 



Unio tecomensis De Gregorio, Moll, di aq. dul. di Amer., 1914, p. 26. 



This species was at first referred to Obovaria by Ortmann (78, p. 119) 

 and later to Nephronaias (79, p. 325). It should rather be referred to Ac- 

 tinonaias F. and C. 



According to the specimens in the Poulson collection (Vanatta, 140, p. 

 551) U. crassa Raf., fasciata Raf. and pallens Raf. are this species, 



LampsiIvIS luteola (Lam.). 



Vanatta (140, p. 551) states that L. fasciola Raf. is this species. 



Lampsilis nebulosa (Con.). 



Is a Micromya according to Ortmann (81, p. 64). 



Lampsilis nigerrima (Lea). 



Is a variety of L. concestator Lea according to Frierson (41, p. 135). 



Lampsilis occidentaeis (Con.). 



Is Ptychobranchus clintonensis Simp, and has priority according to Ut- 

 terback (135, p. 317)- 



Lampsilis orbiculata (Hild.). 



Belongs to Lampsilis s. s. and does not group with L. ligamentina Lam. 

 according to Ortmann (79, p. 353)- 



