274 



: ' GEN XXVI. 



TROCHUS. 



Animal a LIMAX. 

 SHELL, univalve, fpiral, fub-conic. 



Aperture, fub-tetragonal, in fome angulated, in others 

 rounded; tranfverfely contra6led. 



Columella, oblique. 



i; * 



ZiziPHlNUS. Trochusziziphinus. Lin. Syji. p. 123l.-~GmeI. Syji. p.3579.S0. 



C/iem. Conch, v. t. 166, f. 1592. 1594. 

 Lifter Conch. t.616. f.l. — /J, Angl. t.3.f.l4. 

 Br. Zool. t. 80. f. 103. 

 Da Cofta. p. 37. t. 3. f. 2. 2. 

 Borlafe Corn. t. 23. f 7. 

 Turt. Lin. iv. p. 472. 

 Pult. Cat. Dorfet. p. 44. 

 Don. Br. Shells, ii. t. 52. 

 Trochus Conulus. Br. Zool t. SO. f. 104. 



T. with a conic (hell, terminating in a very fine point, 

 with feven or eight volutions, wrought with feveral fpiral 



ridges j 



