PLATE XLI, 



Trochus Conchyliophorus. Born. mus. t. 12./. 91. 9% 

 Trochus Lithophorus. Mart, besch. BerL naturf, 1. 12./. 2. S. 

 Phorus Agglutinans, le Frippier agglutinant. De Montfort 



Trochus Agglutinans, Troque agglutinant. Lamarck T. 7. 

 p, 14. n. 18. 



Trochus Conchyliophorus is a native of South America, and is 

 a shell of moderate size, seldom exceeding two inches and a half or 

 three inches in diameter, and rising to the height of two inches or 

 two inches and a half. 



This shell when its growth is unimpeded by any adventitious 

 adhesions, presents a form of usual symmetry, a trochus somewhat 

 conic, or having a moderately elevated spire, with the whorls regular 

 and well defined. The colour is white or yellowish, inclining to a 

 lacteous hue : the base of the shell flattish and radiated with semi- 

 circular divergent rays of deep tawny, and the interior of the mouth 

 or aperture of a tint somewhat similar. Such is the characteristic 

 appearance of this shell when its growth has proceeded in an unob- 

 structed manner; but, this is indeed a circumstance of rare occurrence, 

 for nothing can exceed the sportive capriciousness with which, from 

 necessity or design, or from some peculiar cause which we have yet 

 to learn, the animal of this shell deforms its habitation by emburthening 

 it with the spoils of other testaceous creatures. The appearance of 



