CYLINDRITES. 479 
429, Cyninprites atrenuatos, Lycett, 1850. Plate XLIII, figs. 15 a, 150. 
1850. CyLinprites arrenuatus, Lycett. Ann. Mag. Nat. Hist., 2nd ser., vol. vi, 
p. 418. 
1853. — - — Proe. Cotteswold Nat. Club, vol. i, 
p- 79. 
Syn. — aRrapus, Lycett. Op. et. vol. cit. 
Cf. also — GRADATUS, Oossmann, Gast. Terr. Jur. p 76, pl. iui, fig. 50. 
Description.—Height 8 to 10 mm. and about two and a half times as long as 
wide; the shell is cylindro-conical, with a short conoidal spire, consisting of about 
six whorls which are narrow and step-like, with sharp edges. The body-whor! is 
flattened and attenuated towards the base. The posterior portion of the aperture 
is extremely narrow, and the twist on the columella not very strongly marked. 
felations and Distribution.—The strongly step-like character of the spire-whorls 
is a characteristic feature. Rare in the Inferior Oolite at Leckhampton. 
430. CYLINDRITES BREVISPIRA, Sp. nov. Plate XLII, figs. 17 and 18. 
Description.— Height 6-4 mm., width 4mm. Shell sub-cylindrical, wide at top 
and much narrowed towards the anterior extremity. The spire is very low, but 
the margin of each spire-whorl projects slightly beyond the margin of the body- 
whorl, so that the figure of the spire is that of a very depressed, though regular 
cone. There are about six whorls in all, the margin of each presenting a sharp 
upturned edge with a slight hollow between. The body-whorl is pyriform. 
Relations and Distribution.—Differs from Cy. attenwatus in its pyriform rather 
than cylindrical shape, its greater proportional width, and in having a still more 
depressed spire, whose whorls also are less flattened. Bears some resemblance to 
Cy. bullatus, Morris and Lycett, but in that species the spire is sunken. 
There are five specimens in my Collection from the Lincolnshire Limestone of 
Weldon. 
431, CYLINDRITES TABULATUS, Lycett, 1850. Plate XLII, figs. 14a, 146, and var. 
Weldonis, figs. 13 a, 13 0. 
1850, CYLINpRITES TABULATUS, Lycett. Ann. Mag. Nat. Hist., 2nd ser., vol. vi, 
p. 418. 
1853. — — as Proe. Cotteswold Nat. Club, vol. i, 
p. 79. 
