20 MOLLUSCA FROM THE CRAG. 



1. Volttta Lamberti. J. Sow. Tab. II, fig. 3, a — b. 



— Dale. Hist, of Harwich, pi. 10, fig. 14, 1730. 



Volute of Harwich. Park. Organ. Rem. t. 5, fig. 13, 1811. 

 Voluta Lamberti. J. Sow. Mm. Conch, t. 129, 1816. 

 Mitra Lamberti. Flem. Brit. An., p. 333, 1828. 

 Fasciolaria Lamberti. Conrad. Journ. Nat. Sc. vol. vi, p. 216. 

 Voluta Lamberti. Charlesworth. Mag. Nat. Hist. p. 37, fig. 7, 1837. 



— Grateloup. Cat. des An. de l'Adour, p. 50, 1838. 



— Dvjard. Mem. de la Soc. Geol. de France, torn, ii, pt. 2, p. 300, 1837. 



— Nyst. Coq. foss. de Beige, p. 587, pi. 45, fig. 4, 1844. 



— Morris. Catalog, of Brit. Foss. p. 167, 1843. 



— S. Wood. Catalogue 1842. 



V. Testa fusiformi, ovafd, vel elongata, tenuissime striata, spird conicd, apice papillari ; 

 anfractibus convewiusculis, si/perne depressis ; aperturd ovatd, ad basim subcanaliculatd, 

 attenuatd, vix emarginatd, columella redd, plicaid. 



Shell fusiform, ovate, or elongated, very finely striated, with 5 — 6 slightly 

 convex volutions ; aperture ovate ; base subcanaliculated, rather produced ; columella 

 straight, with four plaits. 



Axis, 7 inches. 



Locality. Cor. Crag, Aldborough, Ramsholt. 

 Red Crag, passim. 



This species is not confined to any locality, but is found in most places where 

 a section of the Crag is visible. It scarcely fulfils the conditions required by the 

 above generic characters, the base being produced and not emarginate, and the 

 lower plait upon the columella being the smallest. As similar characters may be 

 observed in some recent species, still included in this genus, it may be as well to 

 leave the Crag one where it has been so long placed, until further information be 

 obtained respecting their inhabitants. 



It presents a good deal of variation in the proportionate dimensions, some 

 specimens being much elongated, with a longitudinal diameter three times that of 

 its transverse, while in others it is only as long again. The outer lip, when perfect, 

 is sharp and rather arched, with an incipient sinus at the suture. The shell was 

 probably covered with fine stride, in its original state, but very little of those 

 markings can ever be seen ; they are most visible on those specimens that are 

 washed up on the beach at Felixstow. This important character was first pointed 

 out by Mr. Charlesworth, at the above reference. 



The length of my largest specimen is seven inches ; another imperfect one 

 indicates a magnitude of at least two inches more. Some fine specimens of a Volute, 

 from Touraine, in Mr. Ly ell's cabinet, belong, I think, to this species ; they are 

 rather thicker than the Crag ones, and short, resembling var. a (of our plate), and 

 the folds upon the columella are rather less oblique, but not sufficiently different to 

 remove it from this species. A young specimen shows the fine transverse stria3. 



