Occasional Papers of the Museum of Zoology 63 



tlian carinata gibba. It must, therefore, be held to be uniden- 

 tifiable. 



Then follows U. fasciola Raf. According to \'anatta, the 

 Poulson type belongs to lutcola auct. (=^ siliquoidca Bar.), 

 but this is contradicted by Conrad, who mentions also a speci- 

 men from the Poulson Collection, which is called fasciolus, 

 and is identical with multiradiatus Lea. Moreover, as will 

 be shown under Lampsilis fasciola, Rafinesque's description 

 does not fit the present species, but does fit mnltiradiata very 

 well. Thus, also, this name cannot be used. 



Next are two names given by Barnes, '23, inflatus and sili- 

 quoidcus. That these are identical and belong here has been 

 recognized by Lea, '29, confirmed by Conrad, and accepted by 

 Simpson, and there is no doubt that siUqnoidcus is the male, 

 inflatus the female. Of these two names, siliquoidcus has been 

 selected by Lea in '29, while Conrad, in '34, selected inflaHus, 

 but changed subsequently ('36) to siliquoidcus. The latter 

 thus is the valid name, and should be used for the species 

 hitherto commonly called lutcola. 



Lamp.silis vkxtricosa (Barnes), 1823 



Type locality: Wisconsin and Mississippi rivers, Prairie du 

 Chien, Wis. 



Lampsilis cardimii Rafinesque, '20, p. 298, pi. 80, f. 16-19. 



Unio vcutricosus Barnes, "23. p. 267, pi. 13, f. 14. 



L". cardium Raf. = U. z'ciitricosus Bar., Conrad, '34, p. 68 



Lampsilis ventricosa (Bar.), Simpson, '14, p. 38. 



L. cardium. Raf. = L. ventricosa (Bar.), Vanatta, '15, p. 551 ("type" 

 examined). 



L. cardium Raf. = 1.. ovata Say. '17, Ortmatm, '18, p. 583. 



L. ventricosa (Bar.)=rZ,. cardium Raf., Walker, 'iS*^, p, 184 (''if 

 identifiable"). 



Conrad and X'anatta (examination of the alleged Poulson- 

 Rafinesque "type") make cardium the same as ventricosa. 



