GASTEROPODA. 31 
C. Testa subulatd, apice acuto, anfractibus (\10—11) planatis, pentagonalis, longi- 
tudinaliter costatis; costis 5 in ambitu, perpendiculariter continuis, elatis, subacutis ; strits 
numerosis transversis impressis ; canali minima. 
Shell subulate, apex acute, whorls (10—11) flattened, pentagonal, longitudinally 
costated ; costa continuous, perpendicular, elevated, rather acute, 5 in a volution; striz 
numerous, transverse ; canal very small. 
This elegant, symmetrical, and remarkable species has the junctions of the whorls strongly 
marked ; it ranks among the choicest of our smaller shells. Axis 9 lines, transverse 
diameter 2 lines. 
Locality. Yt has been found only in the planking of Minchinhampton Common and 
white stone of Bussage. We are not aware that more than four examples have been 
discovered. 
CERITHIUM STRANGULATUM, 4rchiac. Plate IX, fig. 18. 
CERITHIUM STRANGULATUM, Arehiac. 1843. Mém. Géol. Soc. France, v, p. 382, t. 31, 
figs. 1, a, 6. 
—_ — D' Orb. Prod. Paléont., p. 303. 
—_— —_— Bronn. Index Paleont., p. 274. 
C. Testé minutd, subcylindricd, pupeformi, costatd ; anfractibus subplanatis 7, trans- 
versim sulcatis; sulcis 4, penultimo 5; costis (6) rectis, elatis et longitudinaliter continuis 
ab apice ad anfractum penultimum; apertura constrictd, parvd, obliqud subrotundd ; canali 
nullo, 
Shell minute, subcylindrical, or pupzeform, costated ; whorls nearly flat (7), transversely 
sulcated, sulci 4, and 5 upon the penultimate whorl; coste 6, straight, elevated, and 
longitudinally continuous from the apex to the penultimate whorl; aperture contracted, 
small, oblique and somewhat rounded ; no canal. 
This little shell has promiment lines dividing the transverse sulcations; the costal 
elevations, although strongly marked upon the first three or four whorls, are not dis- 
tinguishable upon the latter two; these whorls have also a greater proportional length than 
the others, their breadth but little exceeding their height; the junctions of the whorls are 
not very strongly marked, the apex of the spire is obtuse, the aperture much contracted, 
rounded, and oblique or pupzeform. 
The obtuse spire, flattened whorls, and fewness of the costae, will distinguish this from 
C. bulimoides, Deslongchamps, and C. Roémeri, Goldfuss ; to which in other respects it has 
some resemblance. We have considered it a variety of C. strangulatum, Archiac, although 
in that species the apex is pointed, the general breadth is greater, and the costa are 
continued even to the base of the shell. 
Locality. Ancliff, Wiltshire ; Eparcy, France. 
