GASTEROPODA. 25 
slightly convex ; the last volution is lengthened, its upper margin is rounded ; the aperture 
is very narrow. 
More lengthened and attenuated, the spire more elevated, and its apex more obtuse, 
than in C. acutus, to which species it appears to be most nearly allied. 
Geological Position and Locality. The Great Oolite of Minchinhampton, collected by 
E. Witchell, Esq. 
CyLINDRITES TURRICULATUS. ‘Tab. XLIV, figs. 26, 26 a. 
CYLINDRITES TURRICULATUS, Lycett. Proc. Geol. Soc., 1853, p. 342, vol. ix, pl. 14, 
fig. 8. 
Testa elongata, subylindricd ; spird magna, acuta; anfractibus (8) convewis ; suturis 
profunde impressis ; anfratu ultimo ovato ; apertura angustata. 
Shell elongated, ovately cylindrical ; spire lengthened, its apex acute; volutions (8 in 
the adult state) convex, their sutures deeply impressed, the last volution ovately cylindrical ; 
aperture narrow. 
The general figure somewhat resembles C. a/tus, but the volutions are more numerous, 
and are not flattened, as in that shell; the subovate figure and elevated spire readily distin- 
guishes it from other contemporaneous species. The length of the aperture is equal to 
three fifths of the entire shell. 
Geological Position and Localities, Formerly collected at Ponton, Lincolnshire, by 
Professor Morris ; recently it has been obtained in the Great Oolite of Minchinhampton 
by E. Witchell, Esq. 
Actron Batuonicum, Lyc. Tab. XLIV, fig. 16. 
Testa parva ovata, spira elevata, anfractibus (4) subplanis, ad suturam angulatis, supra 
angulam spiratis, tabulatis, ultimd anfractu striis regularibus tenuibus; apertura ovali, 
postice angustatd. 
Shell small, ovate, spire elevated, volutions (4) rather flattened upon the sides and ele- 
vated, their superior borders forming a sharply defined angle ; above the angle is a flattened 
sutural area, the last volution has regular, delicate, encircling striations; the aperture is 
moderately large, ovate ; the posterior extremity narrow; its length is more than half the 
height of the shell. 
A minute but well-marked species, with a spire larger, more lengthened, more angulated 
and more pyramidal than Auricu/a Sedgvici, Phil.; it is more nearly allied to Zornatella 
Aviothensis, Buv., ‘ Pal., Mense,’ pl. xxiii, figs. 32, 33; and to Zornatella pulla, Kock and 
Dunk., ‘Ool.,’ pl. xi, fig. 11; but these have the spire more lengthened and _ less 
flattened. 
Geological Position and Locality. One of a series of minute and, for the most part, 
4 
