Catai^ogue Re;ce;nti,y De;scribf,d Moli^usca 177 



Genus ANODONTOIDES Simpson, 1898. 



Anodontoides fe;ussacianus (Lea). 



Anodonta ferussaciana incertopsis De Gregorio, Moll, di aq. dul. di Amer., 

 1914, p. 34, pi. XI, fig. 5. 



Genus LASMIGONA Rafinesque, 183 1. 



Symphynota Simpson (non Lea), Syn., 1890, p. 662; Desc. Cat., 1914, p. 

 480. 

 Frierson (Naut., XXVIII, 1914, p. 40) has shown that the original type 

 of Lea's Symphynota was Unio alatiis Say and it is therefore a synonym of' 

 Proptera Raf. and that consequently Lasmigona Raf. as the earliest avail- 

 able name becomes the generic type. 



Subgenus PLATYNALAS Walker, 1918. 



Platynaias Walker, Occ. Pap., Mus. Zool., U. of M., No. 49, 1918, p. i. 

 Type : Symphynota compressa Lea. 



As the result of the disappearance of Symphynota Lea from this genus, 

 the group typified by 5^. compressa Lea was left without any name and 

 Platynaias has been proposed for it. 



Lasmigona compressa (Lea). 



Unio ccmprcssa ? lindus De Gregorio, Moll, di aq. dul. di Amer., 1914, p. 14, 

 pi. 6, figs. la-d. 

 Frierson (43, p. 57) has argued that Rafinesque's Unio viridis is this 

 species and consequently has priority. This has been contested bv AA'^alker 

 (157. p. 74). A^anatta (140, p. 554) states that Poulson's shell labelled 

 Unio viridis fnscata from the Kentucky River, is the Sym.. viridis Con. of 

 Simpson's Synopsis. This I have verified from a personal inspection of the 

 shell. For the reason stated bv Walker, (\. c, p. 78) Lea's name is not 

 superceded by alasmodontina Stimp. and will stand as the specific name. 



Lasmigona \'trtdis Rafinesque. 



For the conflicting opinions in regard to this species see the preceedins^ 

 note. LTnder all of the evidence that has been adduced I think that Raf- 

 inesque's name should be given orecedence, with snhviridis Con. (24, App. 

 p. 4), viridis "Con." Simp, and tappanianus Lea as synonyms. 



Subgenus ALASMINOTA Ortmann, 1914. 



Alasminota Ortmann, Naut., XXV IH, 1914. P- 4i- 

 Type: Margaritana holstonia Lea. 



Frierson (42, p. 7) has identified Rafinesque's Alasmodon badinm as 

 this species and has designated it as the type of Sulcularia Raf. If the 

 species is identifiable from the original description and is Lea's holstonia, 

 Sulcularia has precedence over Alasnti)iofa. 



