*w7iich occurs in the Island of Gtiernsey. 225 



a friend of his promised, several years ago, to inform him of 

 its inhabiting this island. In 1827, a gentleman of the 

 Island of Jersey kindly furnished me with a shell, said to have 

 been found in the neighbourhood of Bristol : it bore, when 

 sent to me, a label inscribed " Bulla haliotidea." On my 

 examining this shell, I found it to be that of a Testacellus ; 

 and, as I had not seen the T. haliotideus, which is a native of 

 France and Spain, I imagined that some error had crept in, 

 and that the specimen had been received from the Continent. 



As far back as 1801, the Testacellus which is represented 

 in my drawing (Jig, 39.) was known to me, as it was then 

 plentiful in my own garden ; since which period it has disap- 

 peared from it ; but, at the end of the valley near which my 

 garden is situate, the ground is plentifully supplied with indi- 

 viduals of it. 



[Characteristics and Habits,'] The colour of the animal {a) 

 is, generally, a sickly yellow spotted with brownish specks, 

 mixed with pale orange along the lower parts. The figure, 

 in VI. 45., of T. Mauge? [repeated here {Jig, 40. c, d)] has 



the lateral furrow 

 ^^ ^^^^ passing under the 



side of the caudal 

 shell [erroneous- 

 ly: seeinp.229.]. 

 In the animal 

 here, the furrow, 

 as is shown in my 

 figure (39. &, c), 

 commences near 

 the top or ante- 

 rior edge of the shell, by a double nearly united line, which 

 diverges in a sort of erratic direction on both sides of the ani- 

 mal, dividing the sides into imequal portions, until it terminates 

 near the head. This line is better seen when the animal is 

 extended, as are also the granulations or shagreen which are 

 spread over the skin. It will be observed that I have shown 

 six, instead of four, tentacula [our engraver has omitted the 

 sixth]. The fact is, that the animal can, at its pleasure, 

 expand and convert the corners of the lip into a subsidiary 

 retractile pair, in place immediately beneath the anterior pair, 

 to which they are equal in dimensions and similar in appear- 

 ance. This fact may account for the difference of opinion 

 which has obtained on the number of these organs. 



The eggs are perfectly oval, hard, and opaque ; when fresh, 

 white and covered with a clear viscous juice ; when older, 

 they assume a deeper tinge, much like that of the egg of our 

 Vol. VII. — No. 39. q 



