GASTEROPODA. 45 
NV. Testa hemisphericé, spird parvd, depressd ; apice acuto ; anfractibus angustatis, 
planis, anfractu ultimo ventricoso ; apertura ellipticd. 
Shell hemispherical, spire small, depressed; the apex acute; whorls narrow and 
flattened, the last whorl ventricose; aperture of moderate size, and elliptical; inner lip 
rounded. 
The general figure approaches to globular, except at the base of the spire, which is 
flattened, and only the small volutions rise above the wide and flattened upper surface of 
the last whorl; the base is comparatively narrow; the inner lip is gracefully curved, but 
not apparently thickened, nor is there any trace of an umbilical fissure. One specimen only 
was obtained in the planking. It is imperfect about the outer lip, and scarcely half the 
dimensions of the shell figured by D’Archiac. Length 10 lines, breadth 10 lines. 
Locality. Minchinhampton ; Eparcy, France. 
Sub-Genus—Huspira, Ag. 
Shell smooth, ovate; spire elevated; of few whorls, which are angulated, the angles 
sometimes taking the form of a carma; less frequently the last whorl has a second carina, 
or the carina becomes nodulous or tuberculated ; aperture entire, elliptical, modified by the 
angle of the whorl; base wide, rounded; pillar lip smooth and excavated, outer lip thin 
and smooth. 
The Great Oolite shells referable to this genus are all rare. One of them, however 
(#. canaliculata), though rare in this formation, is abundant in the middle division of the 
Inferior Oolite. 
Huspira CANALicuLaTa.* Plate XI, fig. 23, 23a. 
E.. Testa oblonga, spird sub-exsertd, apice acuto, anfractibus angulosis, angulis acutis; 
anfractibus superne profunde canaliculatis, inferne sub-conveais; anfractu ultimo obliquo, 
basi attenuata; apertura ellipticd, fissurd umbilict angustata. 
Shell oblong, spire but little elevated, apex acute, whorls angulated, the angles acute, 
the upper portion of the whorls deeply channelled, their lower portions rather convex, the 
last whorl oblique, its base attenuated; aperture elliptical, the umbilical fissure narrow. 
Several obscure encircling lines may be traced upon the middle of the last whorl. The 
specific characters of this shell are so strongly marked that it will not readily be mistaken 
for any other; several specimens have been extracted from the limestone beds in the upper 
portion of the Great Oolite; but in the middle beds of the Inferior Oolite in Gloucester- 
1 Although we have provisionally arranged this and the four following species under a sub-genus of 
Natica, they present considerable affinities to the Palaeozoic genus, Scalites (Hall), in the lines of growth 
haying the appearance of a slight fissure where the angle occurs in the volution. 
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