GASTEROPODA OF THE EOCENE MAELS. 193 



tions probably five or more ; only three and a half are preserved in the most 

 perfect specimen; aperture round, moderately large; principal varices 

 alig-ned on the different volutions, and showing distinct evidences of the 

 expanded periodic lips ; intermediate varices one only in each space, much 

 ■ less conspicuous than the others ; beak and canal not preserved beyond the 

 base of the last volution, but at that point showing evidence of having been 

 moderately strong; surface covered with elevated spiral lines which have 

 been rounded and gradually increasing in strength and distance from each 

 other from the upper margin of the volution to near its base, or as far as 

 they can be distinguished on this part of the cast. 



This is the only species of this genus of shells detected in the Eocene 

 Marls of the State, so far as I am aware. It is a well marked species of 

 Triton when closely and understandingly examined, but still not easily dis- 

 tinguished on cursory examination from some of the forms of Fusus and 

 Fasciolaria present in the marls with it. 



Formation and locality: In the upper beds of the Upper Green Marls at 

 Shark River, New Jersey, and in the collection at Rutgers College. 



PURPURID^. 

 Genus PSEUDOLIVA Swainson. 



PSEUDOLIVA VETUSTA ? . 



Plate xxiv, Fig. 20. 



Monoceras veiusta Conrad: Foss. Shells Tert., p. 44, 2d ed. p. 37, PL xv, Fig. 3. 

 Monoceras pyruloides and M. fusiformis Lea: Cont. to Geol., p. 161 and 167, PI. 



5, Figs. 166 and 167. 

 ? Buccinorhis vetusta Conrad: Am. Jour. Conch., vol. 1, p. 22; Meek, Check List 



Eocene Foss., p. 17. 

 Pseudoliva {Buccinorhis) vetusta (Con.) Meek, Check List Eocene Foss., p. 17. 



Internal casts of a species of Pseudoliva^ apparently of the above species, 

 so far as general form and character of a cast can determine, occurs in the 

 Eocene green sands at Shark River. The specimens are of about the size 

 of adult individuals from Claiborne, but appear from the general condition 

 of preservation to have been a worn specimen when imbedded, and so poorly 



MON XVIII '13 



