Occasional Papers of the MuseiiDi of Zoology 5 



belongs rather to kirtlandianus Lea than to siibrotundus. 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 sintoxia 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. 



Obliqnaria flava Rafinesque, '20, p. 305, pi. 81, f. 13, 14. 



Unio rubiginosus Lea, '29, p. 427, pi. 8, f. 10. 



U. flm'iis Raf. = L'. rubigvwsus Lea, Conrad. '34, p. 69; Ferussac, '35, 

 p. 27; Conrad, '37, p. 74. 



Quadrida nibiginosa (Lea) Simpson, '14, p. 872. 



Q. flava (Raf.) = Q. nibiginosa (Lea), Vanatta, '15, p. S5T ("type" 

 examined). 



Fusconaia flava (Raf.) =U. rubiginosus Lea, Utterback, '16, p. 26. 



Quadrida nibiginosa (Lea)=C'Z7/. flava Raf., Walker, 'i8c, 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. 



