GASTEROPODA. 7 



straight, large, obtuse, encircled with regular striations ; sutures of the volutions distinctly 

 marked. 



The costa; form straight, rounded elevations, which pass the whole length of the spire, 

 and are only slightly interrupted by the sutures, the height of each volution being equal 

 to about two thirds of its opposite measurement. It appears to be rare. 



Length three lines, breadth half the length. 



Geological Fosition and Locality. The upper beds of the Great Oolite near Bath, 

 associated with numerous other minute testacea, collected by Charles Moore, Esq. 



Cerithium bulimoides, Desl. Tab. XLIV, fig. 3, 



Cebithium bulimoides, Beslo7igchamps. Mem. Soc. Linn, de Normand., 1848, 



vol. viii, pi. 11, fig. 40. 

 — — D'Orb. Prodr., i, p. 303. 



Tesia minima, elongato-turrita, acuta, anfracfibus rotimdatis, transversim siriatis, longi- 

 tudinaliter cosiatin, costis rectis, hasi ohliqua, transverse striata, ajjertiira subrotunda, 

 columella marginata, canali mdlo. (Deslongchamps.) 



Shell minute, elongated, turreted, acute ; volutions (8) slightly convex, wide, trans- 

 versely striated and longitudinally costated ; costae about 8 in a volution, perpendicular 

 and obtuse ; the sutures are deeply impressed, the aperture is oblique and rounded ; 

 there is no basal canal. 



The costae, which are large and elevated, are slightly knotted where they are crossed 

 by three encircling lines in each volution ; our specimen is imperfect at the base. 



Geological Position and Localities. The Great Oolite of Minchinhampton, collected 

 by E. Witchell, Esq. Erance, Luc. 



Cerithium multiforme, Picfte. Tab. XLIY, fig. 20. 



Cerithium multifoume, Piette. Bull. Soc. Geol. Fr., 2 ser., t. 14, pi. 5, p. 553. 



Testa parva clongato conica, anfractibus (9 — 10) angiistis, convexis, suturis valde im- 

 pressis, costis suboblicjuis (10 ad 12 in ambitu) , magnis, lineis cingendis [h) cnqiialibus ; 

 anfractu ultimo ad basin lineato, canda brcvi. 



Shell small, elongated, conical; volutions (9 — 10) narrow, convex, the sutures deeplj' 

 impressed; costoe large, from 10 to 12 in a volution, longitudinal, but slightly oblique, 

 and knotted by five rows of regular encircling lines, the last volution has encircling lines 

 at the base ; the canal is short. 



The tumid, narrow volutions, large costse, and deep sutures, afford strong distinctive cha- 

 racters, the height of each volution being only slightly greater than a third of its opposite 

 measurement. The specimens figured by M. Piette vary much in the elevation of the spire, 

 and consequently in the breadth of the volutions ; the number of costse likewise differ. 



