106 MOLLUSCA FROM THE GREAT OOLITE. 
whom it is dedicated. The cast of a shell figured by Goldfuss, t. 173, fig. 3, under the 
name of Buccinum antiquorum, from the dolomitic Oolite of Bavaria, may possibly belong 
to an allied species of the same genus. 
Locality. Minchinhampton Common, in the beds of planking. 
Neritopsts varicosa. Plate XI, figs. 20, 20a; Plate XIII, fig. 5. 
N. Testd neritiformi, ovato-oblongd, varicibus magnis longitudinalibus (circd 10 in 
ambitu), plus minusve elatis, et linets numerosis, transversis, regularibus, elatis decussatis ; 
lineis cum striis densissimis perpendicularibus instructis. 
Shell neritiform, ovately oblong; varices large, longitudinal (about 10 in a volution), 
more or less elevated, decussated with numerous regular, elevated, and transverse lines ; 
the lines are impressed with extremely fine and dense perpendicular striz ; the aperture 
round. 
A very thick ovate shel!; the varices vary much in magnitude, so that im some 
specimens they are nearly obsolete, but the large encircling lines are always conspicuous ; 
the dense striations upon the lines are only visible under a magnifier. 
Locality. Minchinhampton Common, where it is rare; but it occurs not unfrequently 
in the middle division of the Inferior Oolite. 
Trocuus sprratus, D’Archiac. Plate XIII, figs. 6, 6a. Plate X, figs. 2, 2a, 24. 
Trocuus sprratus, Archiac. 1843. Mém. Soc. Geol. de France, tom. v, p. 378, t. 29 
fig. da—e. : 
— —  Bronn. 1848. Index Paleont., p. 1306. 
= — D Orb. 1850. Prod. Paléont., p. 300. 
T. Testa conicd, apice acuto, anfractibus (4A—5) lateribus planis, subter medio sub- 
angulatis, cingulis et lineis ornatis ; cingulis duobus, primo prope suturam approximato, 
secundo majori, acuto, parte inferiore anfractuum sito ; lineis inter cingulos striis longitudi- 
nalibus impressis ; basi levi subconvead, umbilico nullo. 
Shell conical, apex acute, whorls 5, their sides flattened, somewhat angulated 
beneath their middle portions, and encircled with bands and lines; the bands are two in 
number; the first is wide, flattened, and placed close to the suture; the second is pro- 
minent, acute, forming a slight angle, and placed near to the base of the whorls ; between 
the bands are several rather obscure encircling lines, which are indented by longitudinal 
strize ; base smooth, slightly convex ; no umbilicus. 
The variation in the prominence of the bands, of the lines, and of the general state of 
preservation, occasions considerable diversity in the aspect of this species, and requires 
