18 MUSEUM OF COMPARATIVE ZOOLOGY. [Apr. 



1st. A set of Fossil Mammalia from France, presented by E. 

 Lartet. 



2d. Several Fossil Mammalia from Texas, presented by J. Boll. 



3d. Various Bones of a Fossil Bird, and of a Fossil Turtle, from 

 Mauritius, presented by N. Pike, Esq., U. S. Consul at Port Louis. 



4th. A number of Fish-Teeth from the phosphate beds, Charles- 

 ton, S. C, presented by the U. S. Coast Survey. 



6th. Several Fish-Teeth from Gay Head, Martha's Vineyard, pre- 

 sented by B. Luce, Esq. 



6th. A large series of Fossil Vertebrates from the Red Crag of 

 England, presented by H. C. Quimbt, Esq. 



7th. A large number of fine fish-specimens from the Harz Moun- 

 tains and from Bohemia, presented by Professor Von Cotta of 

 Freiberg. 



8th. A number of Fish-remains from the tertiary shales of Ql-een 

 River, Wyoming Territory, collected and presented by Mr. J. A. 

 Allen. 



I return, in the name of the Museum, our thanks to all these 

 different gentlemen. 



Report on Conchology by John G. Anthony. 

 Early in the year my time was mainly devoted to a revision 

 of the genus Helix as restricted and bounded by Lamarck and 

 the writers of his day. The authors of that time had much 

 curtailed and improved the Linnsean arrangement previously in 

 use, but the genus Helix still contained many species not prop- 

 erly belonging therein until Albers commenced his labors among 

 the terrestrial Mollusks, his works far exceeding in accuracy 

 those of his predecessors. I have carefully followed Albers in 

 the arrangement which I have completed of our 1,500 species 

 in this interesting genus, and trust that our very large number 

 and range of species has enabled me to do this with perfect sat- 

 isfaction. Nearly all the divisions made by him are well repre- 

 sented in our collection, and the completion of this very desir- 

 able work enables me to record another great and additional 

 step towards a complete catalogue of our Mollusca, wliich we 

 have long been desirous of seeing completed, and of which the 

 Naiadae and Melaniadse, with a few of the minor groups, alone re- 

 main unarranged. 



