ro 



MAR&ArjTANA, 



< 

 S3 



B 



C 



ARCUATE. 



J.Zas. complanahis} Midd. 



*Holstonia. Lea. 



Unio Holstonianus. Han. 



*fabula. Lea. 



Unio fab u la. Han. 



The following species are unknown to me : — 



Alasmodonta Tripolitana. Fer. 



Alasmodonta incurva. Fer. 

 Margaritana Etowaensis. Con. 

 Margaritana Wetzleri {fossil). Dunk. 

 ■Krauss? 



Alasmodonta . Con? 



Alasmodonta (Unio) Stuarti. Ad. & Aug. 



1 Middendorff Silji, Reise, p. 2T3, refers to Unio complanatus, Soland., for this species. 



2 Die Mollusken der Tertiai'-Formation von Kircbberg. 



3 Proc. Acad. N. S., vol. vii. p. 32. The description is at length, but there is no specific name given! 

 Loc. unknown. 



