COS CHOLCGICAL AUTHORS. 
xiii 
and the V. Casina, ive believe to he the sam» s p e dfl s ? 
1 id also the Trochus papillo**^ ana Tr. Granatum. 
wie.se and some othe^* circumstances have inclined us to 
imcar the adoption <p\ his numerous alterations, in many 
o -.rj^h-We h a vc ^ Conviction he is in error. 
Kor a future edition ot' his work, we will venture to give 
jV. Dillwyn a few hints : and they are meant as friendly 
o:ri. Conus Thomse should he C. 0;iue, or after Bru- 
g-icie, C. Omaicus : St. Thomas being a corruption of St. 
On as, or of the island from whence it is procured. See 
01 .nine's Catalogue, p. 15. n, 2 l9, whom Mr. Dillwyn lias 
renamed Callone through his work. In the description of 
?.‘*rcx scriptus, we think the woids stria* and stripes are 
U'fd as synonymous. At p.999, the reference to Da Costa’s 
1 riMi.Co^hology for a figure of Nerita plexa, should pro¬ 
bably be to Da Costa’s Elements. And it is among the er¬ 
rors which have been copied’ from Mat on and Rackctt’s De¬ 
scriptive Catalogue, to affix the letter A in the quotations 
from Lister’s figures, as at p. S.95. It has no relation what¬ 
ever to the plate or the figure, hut merely signifies that 
Lister kn^w it to be English, AngVca. 
In his attempts to criticise the characters as established 
iy Linne, we do not think Mr. Dillwyn has been very for¬ 
tunate. The Biiccinum Gians he considers as incorrectly 
described with two teeth on the pillar-lip, observing that 
lie has never been able to find more than one. In the spe¬ 
cimens now before us, and in all which we have examined, 
there are evidently and visibly two teeth at the upper angle 
of the pillar, the lower of which is much smaller $ besides 
a strong tooth-like projection pointing outwards near the 
base. He doubts the propriety of the term, aplce spirali 
ecu to. as applied to the Serpula lumbricalis, suspecting 
that the spiral end is the part by which it is affixed. A 
flight glance at any one specimen would have satisfied Mr. 
1 \ that the larger and open end is attached at the different 
points of contact, caused by its undulating surface, and that 
the spiral part is detached and nearly erect, as is well re¬ 
presented in Lister’s plate. The closed and pointed end 
of a taper univalve shell is its proper apex. And had 
Mr. Dillwyn well examined the Helix stagnalis, one of the 
most common of our fresh-water shells, he would not have 
expressed 
