196 UPPER, OR FLINTY CHALK. 



margin ; the form of the inner edge is unknown. The striae are about 

 fifteen on each volution, very regular, and elegantly granulated, or moni- 

 liform ; no traces of the shell remain. 



Locality. Lower chalk, near Lewes. 



49. Cast of a species of Dolium ? 



The fossil here alluded to, is the cast of a ventricose spiral univalve, 

 consisting of three volutions. It is nearly seven inches long, and five 

 in circumference. The body is ventricose, the surface smooth, the 

 aperture oblong, extending the entire length of the last volution ; the 

 spire is very small, and depressed obhquely. 



This specimen contains not the slightest remains of the shell, and 

 is so much distorted, as to prevent the possibility of its generic cha- 

 racters being determined. In its general form, it bears some resemblance 

 to the Auricula represented in Tab. xix. fig. 34 ; but is still more nearly 

 related to the sihceous cast of a Buccinum, from St. Peter's mountain, 

 figured by Faujus St. Fond. {Hist. Nat. Mont. St. Pierre. PI. xxx. fig. 

 1. a.) It seems, however, more probable that the recent shell may have 

 belonged to the genus Dolium of Lamarck. 



Locahty. Clayton chalk-pit. Collected by, and in the possession of, 

 Kichard Weekes, Esq. of Hurstperpoint. 



50. Vermicularia umbonata ? 



Imperfect examples of a species related to V. umbonata, are sometimes 

 found in the vicinity of Lewes. The spire is composed of three or 

 four contiguous volutions, the outer one being produced in a curved form. 



51. Vermicularia ? 



Masses composed of a smooth cylindrical shell, much convoluted or 

 intertwined, are of frequent occurrence in the chalk, at Brighton ; the 

 propriety of placing them in the present genus cannot, however, be deter- 

 mined, tiU the discovery of more perfect specimens. 



52. Serpula. 



The remains of a species of serpula are very common on the shells of 

 the echini, inocerami, &c. 



