100 AMERICAN JOURNAL 



Hemifusus Hornii, H. Cooperii and H. Remondii, Gabb, 

 and Ficus mamillatus, Gabb, are members of my proposed 

 genus Ficopsis, of the family Sycotopydse, though the two 

 former species are aberrant, and may be regarded as a sub- 

 genus, or even a distinct genus of ^Sycotopydse* Hemifusus, 

 I believe, has never been found in a fossil state. 



NATICID^E. 



Amauropsis adveata, Gabb, is a member of Lamarck's 

 genus, Ampullina, (Globulus, Sow.; Gflobularia, Swains.) It 

 it quite distinct from the shell figured by Mr. Gabb as the 

 same in Division A. My species was published in 1856, and 

 it is only within a year, I worked out from a piece of limestone, 

 the first specimen of this genus known in the Eastern Eocene. 

 Ampullina, like Natica and Lunatia, never has revolving 

 lines. A. alveata, Con., has a shorter aperture than Mr. Gabb's 

 species, and a broadly reflexed pillar lip. 



ASTARTID^E. 



Venericardia Hornii, Gabb, is a very different variety 

 (or species?) from the V. planicosta as figured in the Pacific 

 Railroad Reports. The latter is more close to the typical V. 

 planicosta, and comes certainly from an Eocene rock. 



VENERID.E. 



Dosinia. As the three species referred to this genus by 

 Mr. Gabb, are without figure or description of the hinge, their 

 generic characters are unknown. I should not be surprised 

 if D. in/iata has the hinge character of Oyprinella. 



Dosiniopsis, Conrad. European species, Gyprina planata, 

 Sowerby ; Venus plana, Sowerby. A genus of the Senonien 

 and Older Eocene. American species, D. alta, Con., D. lenti- 

 cularis, Rogers, D. Meekii, Con. (D. alta, Gabb, not Conrad), 

 all of which are Older Eocene species. 



Hamites Vancouverensis, pi. 1^5, fig. 18, I believe to be 

 an Ancylocerus. 



Ptycoceras ^equicostatus is more likely to be Hamites. 



Neptunea curvirostris, pi. 18, fig. 37, I believe to repre- 

 sent an undescribed genus. 



Lysis, Gabb. This genus is related to Garinorbis, Conrad, 

 (Glathrella, Recluz.) 



* There are some other Eocene forms in Europe allied to these, which I 

 think may constitute a genus, Priscoficus. Examples : P. intermedia, Mel- 

 ville ; P. Smithii Sowerby. 



