1 66 Bryant Waijcer 



Dr. Pilsbry in Vanatta's paper has ver)^ aptly stated the situation as fol- 

 lows : "The use of a Rafinesquian name depends upon whether it could be 

 identified by descriptions published prior to any other recognizable name 

 for the same species. That it can be recognized from the types or other 

 specimens from Rafinesque does not entitle his names to acceptance unless 

 the published descriptions are adequate. This question of the adequacy of 

 published diagnoses must be considered for each species separately." 



In the same connection, see Walker, (157, P- 74)- 



Subfamily UNIONIN^ (Swainson, 1840), Ortmann, 1910. 



Genus QUADRULA Rafinesque, 1820. 



OuADRUi,AASKiiWi (Marsh). 



Frierson (41, p. 136) refers this to headleiana Lea. But Ortmann (81, 

 p. 21) states that it does not group with that species, but is a Pusconaia of 

 the iindata group. 



OuADRULA BEADLEIANA (Lea). 



Includes O. chickasawhensis (Lea) and askewi (Marsh) according to 

 Frierson (41, p. 136). But Ortmann (79, p. 268) says that it is an BUiptio. 



OuADRULA BURSAPASTORIS (B.H.Wright). 



Is a Fnsconaia according to Ortmann (81, p. 90). 



Q\jADRUi,A cocciNEA (Conrad). 



Is a Plenrohenia according to Ortmann {yy, p. loi) and a variety of 0. 

 ohliqna (Lam.) (78, p. 117 and 79, p. 263). 



Utterback (135, p. 190) quotes catillus Con., which Simpson has con- 

 sidered a synonym of Q. coccinea, as a variety of Q. obliqua (Lam.) and on 

 p. 193 of the same paper considers it identical with Q. solida (Lea), having 

 priority and gives it specific rank as such. 



OuADRULA coopEriana (Lea). 



At first referred to Pleitrobema by Ortmann (78, p. 117), this species is 

 now included in Plethobasns by him (79, p. 2*^1). 



OuADRUivA cylindrica (Say). 



Unio cylindricus propetypicns De Gregorio, Moll, di aq. dul. di Amer., 1914, 



p. II, pi. 4, fig. I. 

 Unio cylindricus acrispatus De Gregorio, Ibid, p. 11, pi. 4. fi§"- 2. 



Vanatta (140, p. 556) states that the Unio solenoides Raf. of the Poul- 

 son collection is this species. 



