80 Dr Geo. Johnston's Remarks on the class MoUusca 



Mr Lowe removed it to Turbo, and for doing so the latter was 

 rebuked by Mr Gray, who maintained, that, with Linnaeus, it 

 could l>e nothing but a Tiochus, and in this opinion Mr Lowe 

 afterwards coincided, though on grounds which are unintelligible 

 to us. In face of the censures of Mr Gray? however, here we 

 have it again a legal Turbo, — and if the student asks a reason 

 for these changes, there is none to give, unless the whim of each 

 naturalist is to be considered as reasonable. If we consider the 

 genus Margarita as unnecessary, and in our humble judgment 

 it is so, then we submit the species in question is a Trochus, and 

 we rest our opinion, not so much on the general contour of the 

 shell, as on the structure of the animal. No true Turbo, so far 

 as we are aware, has the sides furnished with tentacular filaments ; 

 but these organs are general in the Trochi. Now, the animal of 

 T. margarita has four of these filaments on each side, and the 

 margin of the cloak between the tentacula is beautifully cre- 

 nulate ; and further, the eyes are on pedicels, a character in 

 which it likewise agrees with Troclms, and differs from Turbo, 

 The species which Dr Fleming has admitted into the genus 

 Phasianella have a very doubtful claim to their place ; and none 

 at all, if we agree with Mr Sowerby in restricting it to such as 

 have a calcareous operculum. The Cingulla pulla, in his view, 

 is a true Phasianella ; and there is, moreover, sufficient in the 

 structure of the animal to induce us to remove it from the 

 Cingidla, for these, if we are entitled to form a conclusion from 

 the recent species common on our shores, have no additional 

 tentacula, and a very thin horny operculum. The Phasianellce 

 of Dr Fleming might perhaps constitute a new genus 

 The following species appears to be nondescript. 



1. Cingulla pulchra. 



Shell conical, white, with two rows of brown spots on the whorls, which are 

 spirally striate. 



Hal. — Sea shore near Berwick. 



Desc Shell li line long, conical, glossy, spirally striate, white, with two 



rows of oblong reddish spots on the body and second whorls : striae regular, 

 impressed. Whorls G, rounded and well defined. Aperture roundish, 

 narrowed above, with even margins, and a slight perforation behind the 

 pillar. 



