GASTEROPODA. 63 
Trocuus Bunsuri. Plate X, fig. 1, la, 14. 
T. Testa conicd; apice acuto; anfractibus (5) cingulatis; cingulis acutis inequalibus, 
basi levi; apertura obliqua. 
Shell conical; spire acute; whorls (5) cingulated ; encircling ribs unequal, and varying 
in different individuals; the base smooth; the aperture oblique. 
The coste are very large, elevated, and unequal, 80 as to obscure the sutures of 
the whorls. 
Locality. It is by far the most abundant of the Great Oolite species in the vicinity of 
Minchinhampton, and is common to all the shelly beds. 
This species is named in compliment to E. H. Bunbury, Esq., M.P., F.G:S. 
Trocnus PILEoLUs. Plate X, figs. 5, 5a, 54. 
T. Testa turbinatd, levissind; anfractibus (4) planis; apice obtuso; anfractu ultimo ad 
basin angulato; basi convexd; apertura parva. 
Shell turbinated, very smooth; whorls (4) flattened; apex obtuse; the last whorl 
encircled with a prominent rib near to the base; base convex ; aperture small. 
The very obtuse spire, and nearly cylindrical form of the last volution, give to the shell 
a cap-like figure. 
Locality. From the white stone of Bussage. It is rare. 
Trocuus anceus, Goldf. Plate X, figs. 7, 7a. 
Trocnts ances, Goldfuss. 1842. Petref., ili, p. 55, t. 180, fig.[3. 
_ _- Bronn. 1848. Index Palzont., p. 1296. 
T. Testa turbinatd, parvd, oblique costatd, basi cingulatd; anfractibus (5—6) tetra- 
gonis cingulatis; cingulis quaternis granulatis. 
Shell small, turbinated, obliquely costated, base sa whorls (5—6) angular, 
encircled with four rows of granules. 
Locality. Of this minute shell we have only obtained two examples, from the white 
stone of Bussage, and believe it to be rare. 
The sutures in the specimens, figured by Goldfuss, are more distinct. 
Trocuus opsoLetus, Roemer. Plate XI, figs. 1, la. 
Trocuvs oBSOLETUS, Roemer. 1836. Nordd. Oolith., p. 151, t. 11, fig. 5. 
— — Bronn. 1848. Index Paleont., p. 1305. 
