XEWTOX : ON 3II0CEXE GASTROPODS FEOJI EOCMAXIA. 



341 



trian<>;ular and V-shaped tubercles, which, on the body-whorl, form 

 a kind of double angulation; aperture pyriform; inner lip with a thin, 

 spreading callus; outer lip varixed. Height of specimen 120, of last 

 whorl 97 mm. ; greatest diameter of last whorl 87, smallest 75 mm. 



Locality. — Near Bustenari, Roumania. 



Formation. — Miocene (Tortonian). 



This fragmentary specimen, showing the usual irregularities in the 

 spire of this genus, consists mainly of a natural cast, very little of the 

 original shell remaining. It shows the two last whorls and portion of 

 a third, and, although so imperfect, the specimen represents one of 

 the largest forms of this genus found in Tertiary rocks. The dorsal 

 view (Fig. ii) exhibits an expansive, swollen body-whorl, with a wide, 



I 



II. 



oblique surface extending from the suture to a sub-angulate margin 

 formed by a series of large, rounded tubercles, beneath which, and 

 parallel to them, is a similar row of tubercles ; in the region of the 

 outer lip these tubercles are much elevated, besides being triangular or 

 V-shaped, with theii* apices dii'ected towards the mouth. 



The ventral aspect (Fig. i) shows the columella to be much excavated, 

 whilst the inner lip is covered with the remnants of a thin callus ; 

 the labrum is distinctly varixed, but its internal characters are hidden 

 with matrix ; near the posterior corner of the aperture are two 

 prominent triangular tubercles ; the anterior canal is not present. 



This fossil is most nearly related to S. nodifera (Lamarck), found in 

 the Middle Miocene rocks of the Vienna Basin, Italy, etc., although 

 much more massive in its proportions, whilst the whorls are deeper 



