Catai^ogue; Ri^centt^y Described Moi.i,usca 167 



QuADRULA EBENUS (Lea). 



Is Obovaria obovalis Raf. of the Poulson collection according to Van- 

 atta (140, p. 558). If identifiable from the original description, obovalis 

 would have precedence. 



OuADRur^A FRiERSONi (B. H. Wright). 



Is a Pleurobema according to Ortmann (81, p. 30). 



QUADRUEA HERDS (Say). 



This species is the type of Megalonaias Utterback. 



Frierson (45, p. 61) has identified Barnes' Unio giganteus as this species 

 and gives it priority. 



OuADRUEA INTERMEDIA (Conrad). 



Unio ttiberosus perlobatits De Gregorio, Moll, di aq. dul. di Amer., 1914, p. 

 9, pl- I, %• 3- 



QUADRULA KIRTLANDIANA (Lea). 



Is a variety of Q. snbrotiinda (Lea) according to Ortmann (78 p. 116). 



QuADRULA LACHRYMOSA (Lea). 



This species has been identified as the Obliqiiaria quadrula Raf. by Say, 

 Conrad and others and Vanatta (140, p. 556) states that the shell so labelled 

 in the Poulson collection is Lea's asperrimus. If identifiable from the orig- 

 inal description, it would have priority. 



QuADRUi.A EACHRYMOSA contraryEnsis Utterback. 



Quadrula lachrymosa contrary ensis Utterback, Amer. Mid. Nat., IV, 1915, 



p. 138, pi. XVIII, figs. 47a-b. 

 Type locality : Lake Contrary, St. Joseph, Mo. 



PeEurobema missouriensis (Marsh). 



The type of this species has been figured by Walker (155, p. 140. pi. V, 

 figs. 1-2) and it appears to be a Quadrula alhed to Q. subrotunda (Lea). 



QUADRUEA OBLIQUA (Lam.). 



Includes pyraivjdata Lea, cocinea Con., and plena Lea according to Ort- 

 mann (78, p. 117 and 79, p. 264) and is a Pleurobema. Vanatta states (140, 

 P- SS7) that the Obliquaria lateralis Raf. of the Poulson collection is this 

 species. 



