1870.] TATE—GLOUCESTERSHIRE LIAS. 405 
whorls five, convex, flattened above; the suture is channelled with 
an abrupt margin around the upper whorls, and linear around the 
lower ones; surface ornamented with numerous incised longitudinal 
lines and closely set striz of growth, visible by the aid of a lens; 
base flat ; umbilicus moderately wide, exposing all the inner whorls. 
The shell of this species has great resemblance to that of Crypt- 
ania heliciniformis, Deslong., but it has more whorls in proportion 
to its size, and the outer margin of the last whorl is regularly 
rounded and not subcarinated. The absence of a fissural band, 
however, removes it from that species. From Z'urbo Marcousanus, 
Dumortier, it differs in its much more depressed spire, and by its 
ornamentation. 
Locality. “Zone of Ammonites Jamesoni,” aan Road, 
Cheltenham. 
CERITHIUM IBEX, nov. sp. (Pl. XXVI. fig. 8.) 
Shell turreted; whorls ten in a length of {%, inch, Suet or 
slightly wrinkled transversely, angulated and imbricating upper 
suture bordered by a thick rounded encircling rib. 
Dimensions. Length 0-6 inch; breadth of last whorl 0-2 inch. 
C. ibex has the general outline of a Turritella; but the aperture 
of a specimen in Dr. Holl’s collection justifies the generic position I 
have assigned to‘the species. It is most nearly related to C. side, 
D’Orbigny, Prodr. i. p. 215, which is described in the following 
terms :—“ lisse avec une légére saillie, dans le sens de l’enroulement, 
au tiers supérieur de chaque tour. Sinémurien, Augy-sur-Aubois 
(Cher).” An examination of the type specimen of C. sidw enables 
me to add a character omitted by the describer, and which dis- 
tinguishes it from (. cbew, that is, an encircling rib below the carina, 
whereas in C. ibew the encircling rib is above the carina and bounds 
the upper suture. 
Locality. Zone of Ammonites Jamesoni, Cheltenham (2. 7’). 
I have examined specimens collected near Cheltenham by Dr. Holl, 
and near Gloucester by Mr. J. Jones (coll. Gloucester Mus.). 
ToRNATELLA CAPRICORNI, nov. sp. (Pl. XXVI. fig. 18). 
Shell elliptical, spire elongated, apex mamillated; whorls five, 
sealariform ; shoulder of whorl forming a right angle, obtusely 
rimmed; last whorl slightly impressed below the upper angle, longi- 
tudinally striated, and marked with fine curved lines of growth ; 
aperture oval, very acute behind and subangular in front ; outer lip 
thin ; columella with a longitudinal ale 
Length 0°55 inch; last whorl about ;%; the length of the shell. 
Locality. Zone of Ammonites Jamesoni, Aston Magna (1. Slatter). 
Zone of Am. capricornus, Mickleton Tunnel (G. L. Gaver Y). 
7. ACTHONINA CANARIENSIS, Noy. sp. 
Shell elliptical, spire elongated; whorls four, scalariform; angle 
of suture obtuse, margined ; : surface of shell shining, marked by 
