476 GASTEROPODA OF THE INFERIOR OOLITE. 



Oolite of Gloucestersliire, which may be the type. Two micromorphs from the 

 Lincohishire Limestone of Weldon seem to answer to Lycett's diagnosis, which 

 is as follows : 



" Ovate ; spire of moderate elevation, consisting of four flattened whorls, last 

 whorl subcylindrical, large ; aperture lengthened, oblique." 



424. AcT/EONiNA TUMiDULA, Lycett, 1850. Plate XLIII, fig. 5 and ? fig. 9. 



1S50. AcT-ioNiNA TUMiDxiLA, Lycett. Ann. Mag. Nat. Hist., 2nd ser., vol. vi, 



p. 418. 

 1851. — — Morris and Lycett. Grt. Ool. Moll., part 1, p. 120, 



pi. XV, fig. 14. 

 1885. — — — Hudleston, Geol. Mag., 1885, 



p. 205, pi. V, fig. 7. 

 ? Syn. — Davoustana, d'Orhigny. Terr. Jur., vol. ii, p. 169, pi. cclxxxvi, 



figs. 5, 6. 



Description by Morris and Lycett. — " Shell small, spire depressed, volutions 

 very narrow, rounded, their sutures deeply depressed ; the last whorl gibbous, 

 aperture an elongated oval. This species is shorter than any other with which 

 we are acquainted." The height of the type is about 10 mm. and the spiral 

 angle 100°. 



Fig. 5 represents the specimen from the Bean Collection at the British Museum, 

 which is believed to be the Yorkshire type, though somewhat difi'erent to the 

 figure given by Morris and Lycett. It is obviously much broken away anteriorly. 

 Lycett had previously described the species from the Inferior Oolite of Gloucester- 

 shire, but no specimens are forthcoming. Very rare in the Scarborough Limestone 

 of White Nab, 



Fig. 9, representing a small IVochadseonina , may possibly be the same species 

 with the anterior portion of the aperture preserved. 



425. TEOCHACTJiONiNA cf. EsPAECYENSis, cV ArcMac, 1843. Plate XLIII, fig. 8. 



184.3. Cassis Espaecyensis, d'Archiac. Mem. Soc. Geol. France, vol. v, p. 385, 



pi. xxxi, fig. 10. 



A single specimen from the Lincolnshire Limestone of Weldon, though only a 

 micromorph 10 mm. in height, has considerable resemblance to this well-known 

 Bathonian species. The spire is even more depressed than in Adseonina tumidula, 

 whilst the body-whorl is broader atop and more pyriform in outline. 



