PARMACELLA. 



iiaar resemblance to a common slug, but is more com- 

 pressed, and instead of its sciitelium being" placed on the 

 anterior part near the head, it will be observed upon a 

 gibbosity in the middle of its back : this scutellum is ovate 

 and fleshy and adheres to the body by its posterior part, 

 imder which the shell is placed ; its anterior margin is 

 quite free. 



Shell small, like a very flat bowl of a spoon, with a 

 very short papilliform spire, contracted at its base, the 

 aperture of its spire very small, but the outer lip very 

 much spread out and rather irregular. The specimens 

 which we have been so fortunate as to meet with are 

 covered on the outside with a light brown, thin, horny 

 epidermis. As far as we can judge from the very incom- 

 plete accounts of the shell given in former works, ours is 

 a distinct species ; but for the same reason which prevents 

 us from deciding that point, we are unable to give its 

 specific distinction, and must therefore be content with 

 s.imply naming it. The Genus differs from Lbnacella in its 

 spiral shell, and from Testacella in being internal. It is 

 an inhabitant of the land. Not known in a fossil state. 



Fig. 1 and 2, Two views of Parmacella calyculata, natural size. 

 3. Tlie inside magnified. 



Ohs. — ^I'he specific name calycidata is given on account; 

 of a little testaceous ridge which surrounds the apertui'e 

 of the spire^ forming a little cup. 



