CONCHOLOGICAL AUTHORS. Xlil 



gida, and the V. Casina, we believe to be the same species^ 

 and also the Trochus papillosus, and Tr. Granatum. 



These and some other circumstances have inclined us to 

 forbear the adoption of his numerous alterations, in many 

 of which we have conviction he is in error., 



For a future edition of his work, we will venture to give 

 Mr. Dillwyn a few hints ; and they are meant as friendly 

 ones. Conus Thomas should be C. O^iae, or after Bru- 

 guiere, C. Omaicus : St. Thomas being a corruption of St. 

 Oma's, or of the island from whence it is procured. See 

 Calonne's Catalogue, p. 15. n. 239, whom Mr. Dillwyn has 

 misnamed Cullone through his work. In the description of 

 Murex scriptus, we think the words strias and stripes are 

 used as synonymous. Atp.999,the reference to Da Costa's 

 British Conchology for a figure of Nerita ple*xa, should pro- 

 bably be to Da Costa's Elements. And it is among the er- 

 rors which have been copied from Maton and Rackett's De- 

 scriptive Catalogue, to affix the letter A in the quotations 

 from Lister's figures, as at p. 8.95. It has no relation what- 

 ever to the plate or the figure, but merely Mgnifies that 

 Lister knew it to be English, Anglca. 



In his attempts to criticise the characters as established 

 by Linne, we do not think Mr. Dillwyn has been very for- 

 tunate. The Buccinum Glans he considers as incorrectly 

 described with two teeth on the pillar-lip, observing that 

 he 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 j besides 

 a strong tooth-like projection pointing outwards near the 

 base. He doubts the propriety of the term, aplce spirali 

 acuto, as applied to the Serpula lumbricalis, suspecting 

 that the spiral end is the part by which it is affixed. A 

 slight glance at any one specimen would have satisfied Mr. 

 D. 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 



