UNIO. 



33 



OBLONG. 



*Griffithiaims. Lea. 



*auratus. Lea. 



Niaa aurata. Swain. 

 Unio obtusa. 1 Fer. 2 

 Unio depressus. Less. 

 Unio Chiloensis. Phili. 3 

 Unio Gfassiesii. 



*atratus. Lea. Sow. 

 Niaa atrata. Swain. 

 Niaa fragilis. Swain. 



Unio auratus. Phili. 



Unio Araucanus. Phili. 



Unio Molinse. Phili. 



*confertus. Lea. 

 *Geddingsianus. Lea. Chenu. 

 *Whiteianus. Lea. 

 *fuliginosus. Lea. 

 *paliatus. RaveneVs Letter. 

 *Tuomeyi. Lea. 



callosus. Lea. 

 *tortivus. Lea. Chenu. 



occidentalis. Con. 



OBLONG. 



Watereensis. Lea. 

 Unio Raveneli.* Con. 



*fulvus. Lea. 



Unio icterinus. Con. 



*rufusculus. Lea. 



*Gibbesianus. Lea. 



*sordidus. Lea. 



*Dariensis. Lea. Chenu. 



*Congarseus. Lea. Chenu. 



*neglectus. Lea. 



*subplanus. Con. 



* deelivis. Say. Desk. K'dst. 

 Unio geometricus. 3 Lea. 

 Unio excultus. Con. 



*paludicolus. Gould. 6 



*Blandingianus. Lea. Kilst. 



*depressus. Lam. D' Orb. Chenu. 

 Unio Balonensis. Con. 



angustus. Lam. 



*modestus. Fer. 



1 Fide D'Orbigny. 



2 D'Orbigny says this is the depressa of Lesson, and figured and described by Lesson in the Voyage de la 

 Coquillc. Now the description of Lamarck answers to the figure of Lesson, and I am disposed to think that the two 

 are the same. I do not know where Ferussac described obtusa. 



3 A specimen of TJ. auratus from Chiloe, South America, sent by Dr. Vandenbusch from Bremen, was labelled 

 TJ. Chiloensis, Philippi. 



4 Prof. Haveners name being previously used for a Unio (Amer. Phil. Soc. Trans., vol. v.), it becomes neces- 

 sary to change Mr. Conrad's name, which I do, to that of the river in which it was found. 



5 I do not find this or deelivis in Mr. Say's Synonymy. He has, however, priority. 



6 This may prove to be U. deelivis, Say. The specimens sent to Dr. Gould have not the beaks sufficiently 

 perfect to see the undulations of the tips. 



9 



