UI VALVES. TURBO. 117 



tus, acutaiigulus, duplicatus, and terebra, which are the 

 principals of the division. 



Tlie Turbo ulyae is found adhering to the ulva lac- 

 tuca. The Turbo perversus has its whorls contrary, and 

 dwells among moss on old walls in Europe, as does also 

 the Turbo musporum; and the Turbo tumidus is often 

 found in the woods of England. Among the fresh-water 

 species the Turbo Nautileus stands conspicuous; it is of- 

 ten affixed to plants in stagnant waters. 



The species from the ocean are principally from the 

 South seas, and among them some of the rarest are found; 

 others are from the American and African oceans, whilst 

 others are the produce of the Indian and Northern seas: 

 and several species are to be met with in the Mediterra- 

 nean and European seas. 



TURBO.— Wreath. 



A. Pillar margin of the aperture dilated and imperfo- 

 rate. 

 Obtusatus. *Rudis. 



Neritoides. *Lineatus. 



♦Littorcus {Periwinvkle.) Muricatus. 

 *Tumidus. Lituus. 



Punctulatus 



B. Solidy imperforated. 

 *Cimex. Petholatus {lUbhand T.) 



*Pullus {Painted W.) Cochlus {Spotted Silver 



*Fasciatus. [3Iouth. 



Personatus. Chrysoslomiis {Gold otolith.) 



