ADDENDA. 107 



genus is seen in A. oUvaformis, Tab. XLI, figs. 4, 4 a, which may be compared with that 

 given in Tab. VIII, fig. 14, part 1. 



AcTEOXiNA SuEssEA, Lt/c. Tab. XLV, fig. 29. 



Testa ovato-elongata, spira elevata, apice acuminata anfractihm (7) ant/ustis, suhangu- 

 latis, superne concavis anfracta ultimo hasi attenuato ; apertura obliqua subreniformi, laJjro 

 interno iricrnssato. 



Shell ovately elongated ; spire elevated ; apex pointed ; volutions (7) narrow, convex, 

 subangulated, their upper surfaces concave, their upper borders strongly impressed with 

 a slightly tumid band ; the last volution attenuated towards the base ; the aperture 

 oblique, and somewhat reniform ; the inner lip conspicuous and thickened ; the lines of 

 growth are very conspicuous upon the spire. 



Geological Position and Localities. The Forest Marble at Farleigh, Laycock, and 

 Pound Pill ; in the collection of W. Walton, Esq. 



AcTEONiNA FAsciATA, Li/c. Tab. XLIV, fig. 15. 



Testa parva, ovato-elongata aut suh-cyli7idrica, spira magna elevata, anfractihns (7) 

 angustis, superne convexis, inf erne plan atis, ultimo anfractu, valde elongato, apertura hasi 

 elliptico curvato, postice angusto ; superficie lineis plicisque perpendicularibus crebris et 

 irregularibuH notatis. 



Shell small, ovately elongated or subcylindrical, the two extremities being somewhat 

 pointed ; spire large, lengthened, consisting of seven narrow volutions, which have their 

 upper portions inflated and their sides flattened ; the last volution is much elongated and 

 sub-cylindrical ; the aperture has its anterior extremity curved elliptically, its posterior 

 position narrow and lengthened ; the surface of the shell, with perpendicular, crowded, 

 irregular plications and lines. 



The test is delicate, and all the specimens are more or less broken. Length of the 

 largest specimen, 6 lines ; breadth, 2^ lines ; length of the aperture, 4 lines. 



Geological Position and Locality. The Forest Marble of Laycock ; in the collection of 

 W. Walton, Esq. 



AcTEONiNA WiLTONENsis, Lgc. Tab. XLV, fig. 25. 



Testa parva, sub-fusiformi, ovato-elongata, spira elata, anfractibus (5 — 6) sub-convexis, 

 anfractu ultimo ovato, apertura elliptica, basi angusto ; superficie lineis perpendicularibus, 

 tenuissimis, crebris notatis. 



