186 SPECIFIC 



Habitat unknown. 



This shell, which constitutes most unquestionably 

 a distinct species of Chiton, was lately brought from 

 Paris, but with it no information of the place from 

 whence it originally came. If it were not unknowu 

 to naturalists, it is scarcely credible that so extra- 

 ordinary a production should have been omitted in 

 modern catalogues. It is a valuable acquisition to 

 its genus, and is indeed well worthy of being placed 

 at the head of an armed division. 



PLATE XXVII. 



Fig. 1. Turbo madreporoides. 



This shell, if such it be, was lately sold with two 

 others of the same description, at the sale of Lord 

 Bute's collection, and was purchased by Mrs. 

 Mawe. The species was brought originally, it is 

 believed, from the coast of Africa, by Captain 

 Young. 



It is certainly extremely doubtful even to what 

 Order this curious specimen belongs. Upon a mi- 

 nute examination of its external characters, and of 

 such internal parts as have been perforated by 



