8 



Bulletin 33 



8 



Horizon. — St. Maurice Eocene. 



Localities. — Newcastle, Piping Tree, Va ; collected by the 1st 

 Ianthina Expedition, '97. 



Genus FICUS Klein 

 Ficus affinis, n. sp., PI. 1 Fig. 10, a. 



Description. — Size and shape of shell as indicated by the fig- 

 ures ; whorls five ; last two whorls of spire smooth ; whorls very 

 convex ; surface ornamented by numerous, subequally spaced, 

 longitudinal ribs ; the intersection of the ribs gives the surface of 

 the shell a cancellated appearance ; both the longitudinal and re- 

 voling lines extend over the full length of the body whorl and 

 the first two whorls of the spire. 



This form resembles in general outline the species Ficus 

 mississsippensis (Conrad) from Vicksburg but differs in the 

 greater regularity of the revoling ribs, in the smaller interspaces 

 between the revoling ribs and in the absence of finer, intervening, 

 revoling lines which are characteristic of F. mississippensis. 

 These lines vary in the young and adult stages of the Vicksburg 

 form, from one to two in number. A single, partially developed, 

 intervening line is noted on a specimen of F. affinis. The gener- 

 al resemblance of the two species seems to indicate F. affinis as 

 the ancestor of F. mississippensis. 



Types and specimens figured. — Paleontological Museum, Cor- 

 nell Univ. 



Horizon. — St. Maurice Eocene. 



Locality.— James river, just below City Point, Va. ; 16 or 17 

 miles above Newburn, on the Neuse river, N. C. Collected by 

 the 1 st Ianthina Expedition, '97 



Genus SOLARIUM Lamarck 



Solarium ianthinae. n. sp. PI. 1 Figs. 7, 8, 9 



Description. — Size and general shape of shell as indicated by 

 the figures ; whorls five or six ; slightly convex ; two revoling 

 channels or furrows extend on the surface of the whorls dividing 

 each whorl into three equal, slightly, elevated areas ; about one- 



