Occasional Papers of the Museum of Zoology 43 
Obliquaria reflexa Raf., Simpson, ‘00°, p. 610; 714, p. 330. 
Obl. reflexa Raf., Vanatta, "15, p. 554 (“type” examined). 
The original description is recognizable; mentioned are the 
thick, convex, rounded shell, truncated posteriorly, sinuated 
on the post-basal margin, the rugosities of the posterior slope, 
and the “knobs” of the medial elevation of the shell, all char- 
acters of this species. 
O. reflexa has been designated as the type of Obliquaria Raf. 
by Simpson (’00). 
CYPROGENIA IRRORATA (Lea), 1828 
Type locality: Ohio. 
Obovaria stegaria Rafinesque, ’20, p. 312, pl. 82, f. 4-5. 
Unio irroratus Lea, ’28 (not ’30 as given by Simpson), p. 260, pl. 
Ber heh. 
U. stegarius Raf.=U. irroratus Lea, Conrad, ’34, p. 71; Ferussac, 
25 epee2o. .Conrad.38, p- 83, pl 40, 4 fr: 
Cyprogenia irrorata (Lea), Simpson, ’14, p. 320. 
Cypr. stegaria (Raf.) =C. trrorata (Lea), Vanatta, *15, p. 554 
(“type” examined) ; Ortmann, 19, p. 218. 
Cypr. irrorata (Lea) = Ob. stegaria Raf., Walker, ’17°, p. 46; °18¢, 
p. 179 (“if identifiable”). 
Cypr. stegaria (Raf.), Ortmann, 718, p. 565. 
Rafinesque’s original figure of stegaria is absolutely insuf- 
ficient to recognize the species as the same as irroratus on 
account of the complete absence of tubercles, and, moreover, 
these tubercles are not mentioned in the description, except 
in variety (tuberculata), which is said to have a few remote 
tubercles; but this also does not exactly fit wrroratus, which 
generally has a great number of crowded tubercles. Since 
also nothing is said about the very characteristic color-pattern 
of the epidermis; except that it is brown (which it is generally 
not), it is impossible to identify Rafinesque’s species, and thus 
Lea’s name (irrorata) stands, notwithstanding the subsequent 
