PLATE XCIV. 



STROMBUS COSTATUS. 



RIBBED STROMBUS. 



GENERIC CHARACTER. 



Animal a slug. Shell univalve, spiral. Aperture dilated, lip ex- 

 panding, produced into a groove. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell small, brown, taper, spires swelled* arid wrought with pro- 

 minent longitudinal ribs. 



Strombiformis parvus fuscis, anfractibus costis elatis longitudinalibite 



insignitis. 

 Costatus. Da Costa. Br. Conch, p. 118. sp.1l. 



Da Costa, who is the only author that describes this curious shell? 

 says it is found on the coasts of Cornwall. 



