ACTAIONINA. 477 
426. Actmontna antigua, Lycett, 1857. Plate XLIII, fig. 6. 
1859. Acrzxontna antigua, Lycett. Cotteswold Hills, p. 125, pl. iv, fig. 9.1 
Description.—The height of the figured specimen is38 mm. Shell oblong, thin, 
with an obtuse apex and short spire of about four or five volutions ; the spire is from 
one sixth to one seventh of the total height ; whorls rounded upon their upper 
borders. Aperture elongate, narrow above and expanded anteriorly; columella 
curved and emarginated at its base, 
The above is a slight modification of Lycett’s original diagnosis. 
Relations and Distribution—The proportions bear some resemblance to those 
of Actxonina glabra, though in this case the spire is shorter and the figure of the 
body-whorl is somewhat different. The type is from the Spinosa-stage of Rod- 
borough Hill, and is the only specimen of that size which has come under my notice. 
Smaller specimens, when compared with Actxonina glabra, exhibit a shorter spire 
than that species. 
427, AcT#ONINA (?) convoLuTa, Lycett, 1857. Plate XLIII, fig. 7. 
1857. AcTmonina convotuTa, Lycett. Cotteswold Hills, p. 125, pl. iv, fig. 8. 
Description—The height of the figured specimen is 35 mm. ‘Shell oblong, 
rather compressed at the sides; spire depressed, scarcely produced, consisting of 
five volutions, which embrace each other and rise but little above the body-whorl ; 
apex obtuse; aperture lengthened, very narrow above, more expanded towards 
the base; columella curved at the base, emarginated and slightly twisted.” 
Relations and Distribution.—The tendency of Actzxonina in the direction of the 
Bullidz seems to reach a maximum in this curious form. As pointed out by 
Lycett, it differs from Bulla primeva, Deslongchamps, in its more cylindrical 
figure and in the fact that the spire is slightly prominent, and not sunk in an 
apical cavity. 
The type is from the Spinosa-stage of Rodborough Hill. I have a character- 
istic specimen from the Clypeus-grit of Aston Farm, and a smaller one from the 
Rag of Cleeve Hill, allin the Parkinsoni-zone. In these specimens the outer lip is 
straighter than in the figured specimen, which in this respect is rather mis- 
leading. 
1 Jn Lycett’s plate the numbers referring to Actzonina antigua and Act. convoluta have been 
transposed. 
63 
