20 MOLLUSCA FROM THE CRAG. 



1. VOLUTA LAMBERTI. /. 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. Min. Conch, t. 129, 1816. 

 MITRA LAMBERTI. Flem. Brit. An. p. 333, 1828, 

 FASCIOLARIA LAMBERTI. Conrad. Journ. Nat. Sc. vol. vi, p. 21G. 

 VOLUTA LAMBERTI. Charlesworth. Mag. Nat. Hist. p. 37, fig. 7, 1837. 



Grateloup. Cat. des An. de 1'Adour, p. 50, 1838. 



Dujard. 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, ovatd, vel elongatd, tenuissime striatd, spirdconicd, apice papittari ; 

 anfractibus convexiusculis, superne depressis ; aperturd ovatd, ad basim subcanaliculatd, 

 attenuatd, vix emarginatd, columettd redd, plicatd. 



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 speci- 

 mens 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 striae, 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. Lyell'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 striae. 



