€ONCHOLOGY. 151 



S. gallus. S. colomba. 



S. bituberculatus. S. succinctus. 



S. cristatus. S. troglodytes. 



S. dilatatus. S. tridentatus. 



S. bubonius. S. urceus. 



S. lentiginosus. S. plicatus. 



S. auris-Dianae. S. Floridus, 



S. pugilis. S. papilio. 



S. pyrulatus. S. lineatus. 



S. gibberulus. S. marginatus. 



S. Luhuanus. S. turritus. 



S. Mauritianus. S. cancellatus. 



S.polyfasciatus. The many-banded Strombus. PL 28, 

 fig- 2. 



Species distinguished by its bands, and by having the 

 margin of the outer Up thickened. 



S. auris-Diance. Diana's Ear Strombus. 



Oblong-ovate ; spire acute, tuberculated, and transversely 

 striated ; base recurved, outer lip thick, anterior lobe with a 

 finger-like termination. 



S. pugilis. The fighting, or thick-spined Strombus. 



Anterior lip prominent, rounded, smooth ; spire crowned 

 with spines, the outermost whorl cancellate ; columella much 

 reflected ; beak three-lobed, obtuse, flesh-coloured, and pol- 

 ished within. 



FAMILY XVIII. 



PuRPURiFERA. Eleven genera. 

 1. Cassidaria. Five species. 

 Marine shell, sometimes confounded with the Cassis, but 

 distinguished by the canal which terminates the aperture be- 

 ing ascendant, very little arched, and not suddenly recurved. 

 Shell sub-globular, ventricose, tuberculated, or fluted; 

 spire short and pointed ; aperture long, oval, sub-canalicula- 

 ted anteriorly ; the right edge effuse and folded back ; the 



