GASTEROPODA. 27 



somewhat shorter. It is nearly allied to Bulla ? primava, Deslongchainps, ' Mem. Soc. 

 Linn, de Normand.' t. 7., pi. x, figs. 23, 24 ; the latter is a larger shell, with the spire less 

 exposed, and the aperture at the base much less lengthened and less pointed ; it is there- 

 fore probably distinct. The elongation of the anterior part of the aperture appears also to 

 separate it from Adconina convohita,\j^Q,., * Cotteswold Hills,' p. 125, the left-hand figure, 

 pi. iv. As three specimens of each form of different states of growth have been examined, 

 we may rely upon the persistence of this distinctive feature. 



Length 11 lines, opposite diameter 6 lines. 



Geological Position and Locality. The Great Oolite of Kirklington, Oxon., collected by 

 Mr. Whiteaves, who has obtained several specimens. 



AcTEONiNA Ltjidii, Luid., sp. Tab. XXXI, fig. 16. ; Tab. XLI, fig. 18, a, b, c. 



CocHLTTES LuiD. Lithoph. Brit. Ichnogr., 1699, 417. 

 AcT^oNiNA LuiDii, Mor. Cat. Brit. Foss., 1854, p. 234. 



Testa suhcylindrica, antice mediocriter attenuato, postice truncato, anfractu ultimo 

 superne anxjulato, lateribus planatis, spira depressa, anfractibus (4 — 5) angustis, apice 

 exserto. 



Shell short, subcylindrical, moderately attenuated anteriorly, truncated abruptly poste- 

 riorly; volutions (4 — 5) depressed, narrow, their upper margins exposed upon the flattened 

 posterior surface ; the apex is slightly elevated and obtuse ; the last volution has its posterior 

 margin angulated and its sides flattened. Casts exhibit the upper margin of the last 

 volution somewhat rounded, and also the edges of the other volutions. 



Height one third greater than the transverse diameter. 



Geological PosiUon and Localities. The Forest Marble of Kidlington, Oxon., collected 

 by Mr. Whiteaves, and of Cirencester, Gloucestershire, collected by myself, at both of 

 which localities it is rare. 



ACTEONINA CANALICULATA, Lyc. Tab. XXXI, figs. 9, 9 «, 9(5. 



Testa suhcylindrica lavigata vel ovata, spira exserta, obtusa, anfractibus (7) angustis, 

 subplanis, sifperne convexis, et canaliculatis, ultimo anfractu subcylindrico, basi . . . . .'' 



Shell subcylindrical, smooth, or ovate ; spire elevated, obtuse, consisting of 7 narrow volu- 

 tions, which have their sides flattened, their upper borders being rounded and deeply 

 channeled ; the last volution is nearly cylindrical, the aperture is not exposed, and the base 

 is imperfect. 



The characters of the spire, with its numerous narrow-channeled volutions, without 

 angularity, appears to be sufficient to distinguish the species. 



Geological Position and Locality. The Great Oolite of Kirklington, Oxon., obtained 

 bv Mr. Whiteaves. 



