316 APPENDIX. 



CANCELLABIA SCALABOIDES, S. Wood. Tab. XXXI, fig. 9. 



CANCELLABIA COBONATA. S. Wood. Crag. Moll., part 1, p. 64. 



I have here introduced the figure of a specimen from the Coralline Crag, at Sudbourne, given 

 to me by Mr. Charlesworth, since the publication of my first part, and as it presents a variation 

 in character from those previously in my possession from the Red Crag, it is desirable it should be 

 represented. From this more especially, and from a further examination of the other specimens, I am 

 induced now to believe the Crag shell to be distinct, and to be intermediate between C. varicosa, Broc., and 

 C. coronata, Scacchi. In this Coralline Crag specimen the costae are very few, not more than seven in the 

 last volution, like those of varicosa, but the upper part is more angular than in that species, and it differs 

 from coronata in not only having fewer costse, but the outer lip of our shell is furnished with numerous 

 ridges or teeth, about ten, apparently at all ages ; and there are three distinct folds upon the columella, the 

 upper one small, the middle one the largest ; while in varicosa the upper one is the large one. The form of 

 the aperture is also different from what is represented by Philippi in the figure he has given of C. coronata. 

 The form of our shell approaches that of Fusus, the proportions of the aperture being little more than one 

 third of its entire length : although these dimensions may vary in several specimens, and is a character of 

 no very great importance, but, united with other differences, give reason to believe our shell to be entitled 

 to an isolated position. The Red Crag shell is probably the prolonged existence of the Coralline Crag 

 species. 



LACUNA VINCTA, Montague. Tab. XXXI, fig. 13, a, b. 



TUBBO VINCTUS. Mont. Test. Brit., vol. ii, p. 307, pi. 20, fig. 3, 1803. 

 LACUNA VINCTA. Turt. Zool. Journ., vol. iii, p. 192. 



Gould. Inv. Massach., p. 262, fig. 178*. 



CANALIS. Turt. Zool. Journ., vol. iii, p. 192. 



QUADBIFASCIATA. Id. Zool. Journ., vol. iii, p. 191. 



Loven. Ind. Moll. Scand., p. 22. 



DIVABICATA. Id Ind. Moll. Scand., p. 23. 



PEBTUSA. Conrad. Journ. Acad. Nat. Sci. Philadelph., vol. vi, p. 266, pi. 11, 



fig. 19. 

 PHASIANELLA BIFASCIATA. Brown. Illust. Brit. Conch., pi. 46, fig. 47, 1827. 



Spec. Char. Testd ovato-conoided, tenui ; anfractibus convexiusculis, rotundatis ; labro tenui, simplici ; 

 columelld late angustd, excavatd, arcuatd. 



Shell ovately conical and thin, with about four slightly convex or rounded volutions ; outer lip thin 

 and simple ; columella elongated, curved, and excavated. 



Length, \ inch. 



Locality. Mam. Crag, near Norwich. 



Clyde Beds. Recent, Britain, Norway, and North America. 



The shell, in the living state, to which my fossil is assigned as an identity, indulges in such con- 

 siderable variation, that I have placed it there as its most probable position, and the longitudinal propor- 

 tions between the varieties called gracilis and quadrifasciata would give a mean with which our fossil 

 appears to correspond, approaching, however, rather nearer to the latter (like the fig. 169, Gould); 

 but the three specimens in my possession are not in good preservation, and have lost the greater 

 portion of the outer coating, by which the form is altered. One specimen presents a somewhat square 

 outline to the aperture, resembling, in that character, L. crassior. The recent shells of this genus have 



