Occasional Papers of the Museum of Zoology 15 



This makes it necessary to find a new name for the section 

 Quadrula (Simpson, '00), in which metanevra stands. 

 Orthonymns Agassiz ('52, p. 48) is available, having for its 

 type U . cyVmdricus Say ; metanevra belongs to this group. 



Quadrula pustulosa (Lea), 183 1 

 Type locality: Ohio (and incorrectly Alabama) rivers. 



Obliquaria rctitsa Rafinesque, '20, p. 306, pi. 81, f. 19-20. 



Obliquaria biillata Rafinesque, '20, p. 307. 



Unio pustulosus Lea, '31, p. 76, pi. 7, f. 7. 



U. bullatus Raf. ^ f/. pustulosus Lea, Conrad, '34, p. 68; '38, p. 82. 



Quadrula pusiulosa (Lea), vSimpson, '14, p. 848. 



Quadr. pustulosa (Lea) prohah\y =: Obliquaria retusa Raf., Vanatta, 

 'is, P- 556 ("type" examined). 



Qu. pustulosa pcrnodosa (Lea) = Obi. bullala Raf., Vanatta, '15, p. 

 557 ("type" examined). 



Obi. rctnsa Rai.^ Quadr. pustulosa (Lea), Walker, '16^, p. 46 (if 

 identifiable) ; 'i8f. p. i68. 



Quad.bullaia (Raf.), Utterback, '16, p. 49; foot-note, p. 198. 



Quad, pustulosa (Lea), Ortmann, '18, p. 539. 



Quad, pustulosa pernodosa (Lea) = obit, bullata Raf., Walker, 'i8'-", 

 p. 169. 



As has been pointed out by \'anatta, Ortmann and Walker, 

 bullata Raf. cannot be used, being preoccupied by Obliquaria 

 flexuosa bullata Raf. ("20, p. 307). Moreover, although the 

 so-called "type" of bullata may be pustulosa pcrnodosa (which 

 is only a variation of pushilosa) , Rafinesque's description con- 

 tradicts this. It mentions an oblique furrow of the shell and 

 rosy nacre, characters which are not found in Q. pustulosa. 



As to Obi. retusa, even the identification of the so-called 

 Poulson "type" is doubtful. From description and figure it 

 is absolutely impossible to recognize it as Q. pustulosa, and 

 not even the characteristic tubercles are mentioned or figured. 



Thus, both names, retusa and bullata, should be discarded 

 and pustulosa stands. 



