ADDENDA. 99 
large, inflated, with small depressed tubercles, rather remote, and arranged in fine 
encircling rows, the rows of tubercles are connected by delicate radiating lines, one of 
which is united to each tubercle; the base has a single, smooth, encircling keel; the 
aperture and inner lip are similar to those of Werita minuta. 
A pretty little and rare species, with the tubercles rather distantly arranged in each 
row, they are somewhat lozenge-shaped or pointed posteriorly, about fourteen occupying 
an entire volution. 
Geological Position and Locality. 'The Great Oolite of Bussage, adjoining Bisley 
Common, in the bed of white stone ; collected by E. Witchell, Esq. 
Trocuus Burronrnsis, Zyc. Tab. XLV, fig. 16. 
Testa conica, levigata, spira elevata, anfractibus (6), postice planatis antice concavis et 
obtuse angulatis, anfractu ultimo basi leviter convexa, imperforata, apertura subrotunda, 
columella basi dente callosa. 
Shell conical, smooth ; spire elevated; volutions (6), their posterior portions flattened, 
the anterior portions concave, bounded by an obtuse carina, the last volution has the 
base slightly convex, imperforate, but with an umbilical depression; the aperture is 
rounded ; the base of the columella has a thickened dental process. Small specimens 
have the spire less elevated, and the bounding carina much less prominent. 
Geological Position and Locality. he Forest Marble of Burton Bradstock ; in the 
collection of W. Walton, Esq. 
Turso prepaurEratus, Lyc. Tab. XLV, fig. 13. 
PLEUROTOMARIA PAGODUS, Var. DEPAUPERATA, Gr. Ool. Mon., Pal. Soc., 1850, part 1, 
pl. 10, fig. 9, p. 77. 
The shell figured in the first part of this Monograph as a doubtful variety of 
Pleurotomaria pagodus, Desl., has, by the aid of other specimens, been clearly shown to be 
a different shell, which does not belong to the genus Pleurotomaria. Very few examples 
have hitherto been obtained, all of which are more or less imperfect, have suffered com- 
pression, or have been indifferently preserved ; however, by comparing one with another, 
the distinctive characters have been fully ascertained. 
A Forest Marble specimen, slightly compressed, is now figured; compared with the 
original of the former figure the spire is less elevated, the ornamentation of the surface 
and of the base are better preserved. 
The description formerly given applies to the species of Deslongchamps, the following 
to Turbo depauperatus. 
Testa turbinata, spira elevata, apice obtuso, anfractibus (5) convexis, imprimis tnornatis, 
