148 MOLLTTSCA FROM THE CRAG. 



12. Natica multipqnctata. S. Wood. Tab. XVI, fig. 9, a—f. 



Natica patula. J. Soio. Min. Conch, t. 3/3. 



— — Nyst. Rech. Coq. foss. d'Anvers, 1835, p. 25, No. 12. 



— — Morris. Cat. of Brit. Fossils, p. 153, 1843. 



— multtpunctata. 5. Wood. Catalogue 1842. 



— crassa (?). Nyst. Coq. foss. de Belg. p. 443, pi. 37, fig. 33, 1844. 



N. Testa elUplicd, oblirjud, depressd, crassa, Icevigold, multipunctal d ; spird produc- 

 tiusculd; anfraciibus quatuor, superne subdepressis, in/erne expanses ; labio calloso, crasso ; 

 umbilico spiral'der jur/oso ; opercalo ad margine unisutca'co. 



Shell ovate, depressed, oblique, with an elliptical outline ; thick, and smooth, 

 covered with numerous spots ; spire slightly produced ; upper part of volution a 

 little depressed, mouth much expanded below; left lip callous, with a small spiral 

 ridge in the umbilicus. Operculum with a deep spiral sulcus near the outer edge. 



Longest diameter, \\ inch. 



Locality. Cor. Crag, Ramsholt and Gedgrave. 

 Red Crag, Walton Naze. 



A most abundant shell at Walton Naze. It differs (as I have before pointed 

 out in my Catalogue in the An. and Mag. Nat. Hist. 1842, p. 529.) from N. mille- 

 pvmctata in the greater size and peculiar flatness of the cal'osity at the upper part 

 of the umbilicus, while the spiral ridge is much smaller, varying not only in the 

 different distribution of this calcareous deposition at its large and open umbilicus, 

 but also in the greater quantity of it : the volutions are also more depressed, the 

 shell more regularly ovate, and the mouth larger, with a less elevated and distinct 

 spire. The differences here pointed out appear to me sufficient to constitute a 

 specific character, and I have, in consequence, retained my own name, which was 

 published in 1842, in preference to that by M. Nyst, which was published in 1844. 

 The Italian and Bordeaux fossils in my possession differ also from the Crag shell. 

 The smaller figure, 9 c, represents a specimen from the cabinet of Miss Alexander, 

 of Goldrood, near Ipswich, who has obligingly permitted me to have it figured. It 

 contains its operculum in position, and was found at Walton-on-tbe-Naze. This 

 appendage differs from that of N. millepunctata in haviug a ridge with a broad and 

 deep sulcus near the edge; and it is rather singular that this is the only instance, 

 to my knowledge, of this thick and strong operculum having beeu found, although 

 the shell may be procured by hundreds. Fig. 9, d e, is from the Coralline Crag, 

 and is probably only a variety of this species. It had been considered distinct, and 

 possessed in ray cabinet the name of consols, but the discovery of an operculum from 

 that formation, corresponding with that found in situ from the Red Crag, has 

 given reason to suppose them the same species. The greatest difference is in its 

 having a rather more distinct and elevated spire, with a sharper apex, and a rather 

 less depressed or elongated aperture. The impression of a calcareous lid is left 



