16 DESCRIPTION OF NEW 



Remarks. — Two specimens of this beautiful species were sent to me 

 about three years ago, by Professor Troost, of Nashville. Expecting 

 to receive other specimens from him, I deferred making a descrip- 

 tion, least they should prove only a variety of U. crassus (Say), the 

 young and perfect of which they strongly resemble in many of their 

 characters. The interruptus differs in the rays, in the flatness of its 

 sides, and particularly in the undulations of the beaks. The broad in- 

 terrupted rays of this species are striking, and between them may be 

 usually observed those which are quite capillary. It may be distin- 

 guished at once from the pulcher (herein described) by its rays, the 

 latter being smaller and not interrupted. 



Ampullaria Pealiana. Plate XXIII. fig. 77. 



Testa subglobosa, Imvi, solida, imperforata, lute&, faciatd, ; spira acuta ; anfractibus qui- 

 nis ; apertura subovath, fasciata. 



Shell subglobose, smooth, solid, imperforate, yellow, banded ; spire acute ; w horls 

 five; aperture subovate, banded. 

 Operculum horny. 



Hab. Turbaco, Colombia, South America. T. R. Peale. 



My Cabinet. 



Philadelphia Museum. 



Diam. 1-1, Length 1-3 inches. 



Remarks. — Among the fine collection of rare and beautiful objects 

 in natural history, obtained by Mr Peale during his late journey into 

 Colombia, was this fine Ampullaria. The yellow ground of the shell 

 is distinctly marked with rich brown bands, which are visible within. 

 In being imperforate, it resembles the A. crassa (Swainson), but differs 

 in being larger, in being more globose, and in having a more effuse 

 outer lip. I dedicate with peculiar pleasure this shell to the discoverer, 

 one of the most enthusiastic and successful cultivators of natural his- 

 tory in our country. Mr Peale found this species in the dry bed of a 

 brook which is devoid of water during half the year. 



