CaTALOGUK RECIiNTl.Y DESCRIBED Moi^IvUSCA 173 



Pl,KUKOBF,MAFASSINANS (Lea). 



This species and its variety rhomhoides Simp, are Fusconaias and syn- 

 onyms of F. barnesiana bigbyensis (Lea) according to Ortmann ('84, p. 59). 



Pi,p:urobe;ma i^enticularis (Lea). 



Is a Fiisconaia and a synonym of P. barnesiana (Lea) according to Ort- 

 mann (84, p. 59). , 



PivEurgbema lEwisii (Lea). 



That this species is distinct from P. cor (Con.), to which it was referred 

 by Simpson, has been shown by Walker (160, p. 114) and U. crapulus Lea, 

 if not distinct, is made a synonym. 



PlEurobema merEdithii (Lea). 



Is a Pusconaia and a synonym of P. barnesiana (Lea) according to Ort- 

 mann (84, p. 59). 



Lampsieis ozarkensis (Call). 



Is a Pusconaia and includes Pleiirobcma argenteiim pannosnni Simp., 

 breve subellipticmn Simp, and iitterbacki Fr. according to Ortmann (84, 

 P-63). 



PlEurobema pudicum (Lea). 



Is a Pusconaia and a synonym. of P. barnesiana (Lea) according to Ort- 

 mann (84. p. 59). 



Pleurobema simpsoni Vanatta. 



Pleiirobema simpsoni Vanatta, Pr. A. N. S. P., 1915, p. 559. 



Originally described as Unio striatus Lea. Lea's name is not preoccu- 

 pied by Rafinesque, but as suggested to me by Frierson it seems to have 

 been by Goldfuss for a fossil species. I have not been able to examine, or 

 to have examined, Goldfuss' original description. Lea refers to Goldfuss' 

 species in his Synopsis, but as usual gives no exact citation. A paLxonto- 

 logical friend has supplied the following references, which seem sufficient 

 to settle the question. Goldfuss' description of his Unio striatus is to be 

 fotmd in his ''Pertrefakten Deutschlands," II, 1839, p. 182, pi. 132, fig. 3. 

 Bronn in his "Index Paleontologicus," 11, p. 1345, includes the species 

 among his "omnia dubii generis". D'Orbigny in his "Prodrome de Paleon- 

 tologie" includes it in his genus Hesione (1847). These facts were probably 

 knoAvn to Lea and explain why he did not rename his species, as in other 



