42 AMERICAN JOURNAL 



CABBIIDJE. 



PROTOCARDIA, Beyrich. 



P. CURTA, Conrad. — PI. 1, fig. 1. 



Description. — Subquadrate, equilateral, ventricose ; summits 

 very prominent ; umbonal slope angular ; posterior slope de- 

 pressed, margin slightly oblique, subemarginate or straight ; 

 ventral margin minutely crenulated. (Cast). 



Locality. — Shark River. 



This genus, common in the Cretaceous strata, is comparatively 

 rare in Eocene and Oligocene, is absent in the Miocene, and 

 only one recent species has been discovered, — C. Beecheri — odd 

 valves of which were dredged up from a depth of 40 fathoms, 

 one valve in the Yellow Sea. 



CARDIUM? 

 C. PI. — fig. 21. 



An imperfect cast, with fine ribs and crenulated margin. 



Locality. — Shark River, N. J. 



ONUSTID^. 



ONUSTUS, Humph. 



0. ANNOSUS, Conrad. — PL 1, fig. 4, 



Description. — Rather elevated; volutions five, rounded, slightly 

 channelled at top, and sculptured with revolving lines, which are 

 obliquely crossed by others, giving the cast a rugoso-tubercu- 

 lated aspect ; lines on the last volution 5 or t) in number ; 

 periphery acute. 



Locality. — Shark River, N. J. 



TEREBRA TJJLIDJE. 



TEREBRATULA. 



T. GLOSSA, Conrad.— PI. 1, fig. 22. 



Description. — Oblong, sub-ovate, ventricose ; biplicated ; ven- 

 tral valve flattened medially and with a nearly straight outline 

 throughout ; lateral margins towards the base obliquely trun- 

 cated ; basal margin obtusely rounded. 



Locality. — N. Jersey. 



Observations. — This shell is nearly allied to T. hijjlicata, but 

 differs in the nearly straight line of the ventral valve, and in 



