VI. TESTACELLUS. 



Shell oval-oblong, flat beneath, somewhat spoon- 

 shaped, with a very short spire. Aperture ob- 

 long, extremely large ; the outer lip thin, with a 

 slight notch at the spiral extremity ; the pillar-lip 

 thickened, and a little re volute. 



The species of this very singular Genus are found 

 attached to the lower extremity of a slug, with 

 the spiral apex pointing towards the tail. This 

 testaceous appendage, Mauge, who brought the 

 animal from TenerifFe, supposes to be intended as 

 a covering for the orifice of the cleft in which it 

 secretes itself during the day-time. As natives of 

 England they were first noticed, we believe, by 

 Mrs. Smith of Bristol, who found the shells casu- 

 ally scattered about the walks of her garden, and 

 afterwards discovered the animal. 



18. TESTACELLUS Maugei. Shell oval- oblong, with 

 the outer lip elevated nearly even with the spire, 

 and the pillar slightly rounded, and reflected out- 

 wardly. 



