Occasional Papers of the Museum of Zoology 5 
belongs rather to kirtlandianus Lea than to subrotundus. ‘The 
original description is unsatisfactory in other respects and 
applies to several forms (ebenus, kirtlandianus, subrotundus), 
and one character, the rose-colored nacre, applies to none of 
these. Thus simtoxia should be discarded and subrotundus 
Lea stands. 
The selection of sintoxia Raf. as the type of the genus Sin- 
toxia by Herrmannsen (’49, p. 527) has no effect upon the 
revival of this name, Rafinesque’s species being, in our opinion, 
unidentifiable, 
FUSCONAIA FLAVA (Rafinesque), 1820 
Type locality: Small tributaries of Kentucky, Salt, and 
Green rivers. 
Obliquaria flava Rafinesque, ’20, p. 305, pl. 81, f. 13, 14. 
Unio rubiginosus Lea, ’20, p. 427, pl. 8, f. to. 
U. flavus Raf. = U. rubiginosus Lea, Conrad, ’34, p. 69; Ferussac, ’35, 
perez -mCcontads @7.eps74- 
Quadruia rubiginosa (Lea) Simpson, ’14, p. 872. 
Q. flava (Raf.) = Q. rubiginosa (Lea), Vanatta, 715, p. 557 (“type” 
examined). 
Fusconaia flava (Raf.) = U. rubiginosus Lea, Utterback, ’16, p. 26. 
Quadrula rubiginosa (ea) = Obl. flava Raf., Walker, 718°, p. 169, 
(“if identifiable’). 
The figures represent rather correctly the outline and pos- 
terior ridge, and the description mentions the compressed 
shell, the yellowish brown color of the epidermis, the pale sal- 
mon color of the nacre, and the yellow orange color of the soft 
parts. Also the remark that the species is found in small 
rivers is significant. 
These characters, together with the figures, cannot be 
applied to any other species of the Ohio drainage and are 
entirely sufficient for the identification of the species, and thus 
flava Raf. stands. 
