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. 
Orthonymus Agassiz (’52, p. 48) is available, having for its 
type U. cylindricus Say ; metanevra belongs to this group. 
QUADRULA PUSTULOSA (Lea), 1831 
Type locality: Ohio (and incorrectly Alabama) rivers. 
Obliquaria retusa Rafinesque, '20, p. 306, pl. 81, f. 19-20. 
Obliquaria bullata Rafinesque, ’20, p. 307. 
Unio pustulosus Lea, ’31, p. 76, pl. 7, f. 7. 
U. bullatus Raf. =U. pustulosus Lea, Conrad, ’34, p. 68; ’38, p. 82. 
Quadrula pusiulosa (lea), Simpson, ’14, p. 848. 
Quadr. pustulosa (Lea) probably = Obliquaria retusa Raf., Vanatta, 
*I5, p. 550 (type” examined). 
Qu. pustulosa pernodosa (Lea) = Obl. bullata Raf., Vanatta, ’15, p. 
557 (‘type examined). 
Obl. retusa Rat.= Quadr. pustulosa (Lea), Walker, ’16¢, p. 46 (if 
identifiable) ; ’18¢, p. 168. 
Quad. bullaia (Raf.), Utterback, “16, p. 49; foot-note, p. 108. 
Quad. pustulosa (Lea), Ortmann, 718, p. 5309. 
Quad, pustulosa pernodosa (Lea) =obli. bullata Raf., Walker, ’18¢, 
p. 160. 
As has been pointed out by Vanatta, 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 pernodosa (which 
is only a variation of pustilosa), 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 ODI. retusa, even the identification of the so-called 
Poulson “type” is doubtful. From description and figure it 
is absolutely impossible to recognize it as QO. pustulosa, and 
not even the characteristic tubercles are mentioned or figured. 
Thus, both names, retusa and bullata, should be discarded 
and pustulosa stands. 
