32 MOLLUSCA FROM THE GREAT OOLITE. 
CERITHIUM TENNANTI. Plate IX, fig. 20. 
C. Testa turritd, acutd, conicd, anfractibus numerosis, angustatis, tricinctis; carinis 
tribus, elatioribus, striis numerosis longitudinalibus impressis; basi planatd, canali 
brevissimda. 
Shell turreted, acute, conical, whorls numerous, thrice cinctured; the bands elevated, 
and impressed with numerous longitudinal striz ; base flattened, canal obsolete. 
The transverse keels are equal, narrow, and elevated, one being mesial, the others close 
to the anterior margin of the whorls; the figure is perfectly regular, and the whorls 
narrow ; the aperture and canal are very short. , 
Locality. Ancliff. 
Named after Prof. J. Tennant, from whose interesting collection of Oolite Fossils this 
species is figured. 
CxrritHium Rotssu, Arch. sp. Plate VII, fig. 14, 14a. 
TurriTELLA Rossi, Archiac, 1843. Mém. Soe. Geol. Fr., vol. v, p. 380, t. 30, f. 2. 
—_— — Bronn. Index Paleont., p. 1336. 
Cuemnitzi1a Rotssy1, D’Oré. Prod. Paleont., p. 298. 
C. Testé turritd subconicd, levi, apice acuto; anfractibus paucis, planatis; suturis vir 
tumidulis; caudda brevi subrectd. 
Shell turreted, subconical, smooth; apex acute; whorls few, flattened; the sutures slightly 
tumid; canal short, and nearly straight. 
A very short or conical species, the diameter of which through the last whorl is upwards 
of half the entire length of the shell; a longitudinal section displays a columella of great 
thickness, the internal cavity being small. 
Locality. Rare in the Great Oolite of Minchmhampton Common. Eparcy, France. 
Nerinmua, Defrance. 1825. 
Shell turreted, either conical or cylindrical, consisting of numerous whorls ; aperture 
subquadrate, having an anterior and posterior short canal; columella, with one or more 
folds ; outer lip, with one or more folds, which are continued through the length of the 
shell; columella umbilicated in the conical, solid in the cylindrical species. 
Nerina Voutzi, Des/. Plate VII, figs.11, lla; var? figs. 7, 7a. 
Nertnma Vourzit, Deslongchamps. 1842. Mém. Soc. Linn. Normandie, vol. vii, pl. 8, 
fig. 34. ; 
i — D’Orb. Prod. Paléont., p. 298, (Not N. Voltzeii, D’Arch.) 
