70 



MARGAHITANA. 



ft 



i 



ARCUATE. 



.Afos. complanatus. 1 Mldd. 



*Holstonia. 



t/m'o Ilolstonianus. Han. 



*fabula. 



Uniofabula. 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. & Any. 



1 Middendorff Sibi, Reise, p. 273, refers to Unio complanatus, Soland., for this species. 

 1 Die Mollusken der Tertiiir-Formation von Kirchberg. 



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

 Loc. unknown. 



