STROM BUS iricornis, 

 Horned Stro?)ibiis. 



Generic Character. — See PI. 10. 



Specific Character. 



S. testa ponclerosd, nodis longitudinaliter compromia armatd ; labia ex- 

 teriore injiexo, margine crasso, suprti attenuato et ultra apiram 

 producto ; canali truncato. 



Shell ponderous, with longitudinally compressed nodules; outer lip 

 indexed, the margin thick, above attenuated and produced 

 beyond the spire ; channel truncated. 



In yoitng stages of groxcth. 



Seba,pl. 62./. 36, 10. Martinis. tab.9\.f. 890. tab. 85./. 847. 



Var. A. Shell whitish, outer lip much produced. Upper figure. 

 Martini, vol. 3. tab. 84./ 844, 845. Szv. Ex. Conch. 'part 4. 



Var. B. Shell varied with chesnut, outer lip shorter. Lowerjigiire. 

 Ency. Meth. t. 408. f.l.t. 409. / 2. Martini, 3. tab. 84./. 843. 

 Lister, 871./. 25. 873./ 29. 



JMartini was the first conchological writer who separated 

 this species from the Stromhus Gallus of Linnaeus ; under 

 which name are included three shells, so remarkably different 

 from each other, that they hardly possess a single character 

 in common. 



The original name of Linnaeus I have retained to that 

 species figured by Seba, tab. 62. Jig. 1 and 2, and by myself 

 in Exotic Conchologij, Part 4. 



Strombus tricornis, although figured, has never yet, I 

 believe, been defined. 



Two varieties of this shell are met with ; one having the 

 attenuated process of the lip much produced, the margins 

 folded inward, and the tip somewhat spatulate, or spoon- 

 shaped : the colour of this variety is generally white, slightly 

 varigated with brown stripes or irregular spots. A very 

 fine specimen of this variety, having these characters re- 

 markably developed, is in my own cabinet, and is figured in 

 Exotic Conclwlogy, part 4. The second variety has the 

 process of the lip shorter, and the margins not folded ; the 

 colour usually brownish, richly clouded and variegated with 

 chesnut; the aperture within is tinged with pale red or rosy ; 

 but that of the other variety is pure white. I believe this 

 species inhabits the coasts of America ; it is a heavy shell, 

 and sometimes measures seven inches in extreme length. 



PI. 135. 



