546 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



by others on a slightly angular or rounded base. Between the strise 

 are very fine longitudinal lines. Aperture large, rather ovate ; lip 

 slightly extended at the base, and folding over a small umbilicus. 



Log. The Liassic coralliferous conglomerate of Brocastle, where it 

 is not uncommon. 



31. Melania acuta, spec. nov. PI. XIY. figs. 20, 21. 



Shell turreted ; spire extended ; apex acute ; volutions 5-6, the 

 upper convex, the body-whorl rather inflated and extended, slightly 

 angulated, and with an obtuse carina; sutures distinct. On the 

 surface are depressed transverse striae. Aperture longitudinally ovate, 

 with a broad shallow sinus. 



I possess several examples of this species from the Brocastle con- 

 glomerate, where it is associated with M. abbreviata and M. usta, 

 described by M. Terquem, from the Lower Lias. 



32. Melania Dtjnravenensis, spec. nov. PI. XIY. fig. 19. 



Shell elongated, turreted ; whorls 6-7 ; spire elevated, acute, with 

 an acute apex ; volutions convex, rather spirally winding, aperture 

 longitudinally ovate. 



This shell occurs very abundantly in the raggy beds I have re- 

 ferred to under the cliff at Dunravenj but generally they only show 

 sections of the chambers, or have their surfaces much abraded. For 

 this reason the character of the test is rather uncertain; but I 

 think the shell was ornamented with rather fine encircling striae. 

 I have noticed imperfect examples of the same shell in the Lias of 

 Bridgend, at Shepton, and near Bath. Imperfect specimens and 

 casts associated with it lead me to suppose that there are several 

 other species. 



33. Melania nodtjlo-carinata, spec. nov. PI. XY. fig. 18. 



Shell large; spire pyramidal; whorls broad, rather convex or 

 angulated, the base surrounded by a line of large nodulations (about 

 twenty in number) on the circumference of each whorl ; base roundly 

 obtuse ; inner lip thick, folded, and slightly sinuous ; aperture large, 

 but not fully exposed. 



Of this fine shell I possess but one specimen, in which only the 

 lower whorl is complete, above which there is only a section of the 

 chambers. On the underside, where it has not been abraded, the 

 shell appears to have a finely waved or striated character. The 

 transverse diameter of the whorls is much greater than their length ; 

 a small portion of the apex is wanting ; but the shell must have been 

 about four inches in length. 



Log. The Lower Lias, with GrypTicea incurva &c., at the top of the 

 Southerndown Clifi^. 



34. NERIFiEA ACUMINATA, SpCC. UOV. PI. XIY. fig. 22. 



Shell small, elongated, cylindrical ; whorls rather long and sepa- 

 rated by a concave sinus ; centre of the whorls most convex and 

 ornamented with longitudinal costae, and with very fine encircling 



