NORTH AMERICAN CONCHOLOGY. 47 



Niinie. Locality. 



Acmsea mitella Mke. 

 Pecten adspersus Soich. non Lam. 

 Avicula atlantica Lam. 

 Area? ovata Rve. 



Mytilus . 



Modiola . 



Cardita affinis Sowb. 

 Cardium muricatum Linn. 



procerum Sowb. 

 Donax? compressus Lam. 

 Tellina cicercula Phil. 

 Cytherea corbicula Za?n. 



argentina Smrb. 



semifulva Mke^ 



chionaea Mke. 

 Venus cancellata Linn. 

 Corbula? ustulata Rve. 



January, ISIS. 



V 1 ]flenke. — Einige neue, theils neuhollandische, und mexi- 



canischer Mytilaceen meiner Sammlung : vom Dr. K. T. 

 Mexke. 



V 2 Mytilus spatula Mke. Mazatlan. 



V 3 biceps Mke. Vera Cniz. 



V 5 Modiola semilsevis Mke. Mazatlan. 



February, 1S48. 



V 17 Pliilippi. — Testaceorum novorum centuria. Descripsit 



Dr. R. A. Philippi. 



V 19 Cerithium (Potamides) Hegewischii Phil. Mexico. 



June, 1S48. 



V 87 Dr. I.. Pfeiflfer. 



V 87 Helicina turbinata Weigm. MS. Mexico. 



V 87 alata Mke. MS. Mexico. 



V 88 Nachtrilge zu L. Pfeiffer Monographia Heliceorum Viventium. 



V 90 Hellz Fabricii Deck. Greenland. 



//. nitida Fabr. 

 Pttasia Fabricii Beck. 



