PLATE CXII. 



TURBO DUPLICATUS. 



TWO RIDGED SCREW SHELL. 



GENERIC CHARACTER. 



/ 



Animal Limax. Univalve, spiral, or of a taper form. Aperture 

 somewhat compressed, orbicular, entire. 



SPECIFIC CHARACTER 



A NO 



SYNONYMS. 



Shell slender, with two sharp prominent spiral ridges. 



Turbo Duplicatus : spirse anfractibus carinis duabus acutis. 



Gmel. Linn. Si/st. p. 3607. sp. 79. 



Buccinum crassum, duobus acutis, & insequaliter altis striis in singulis 

 duodecim minimum spiris donatum. An. Buc- 

 cinum striatum ffaX7nv| Fab. Columns? ? List 

 LI. An. Angl. p. 160. tit. 7. tab. 3. Jig. 7. 



Turbo duplicatus, doubled. Penn. Br. Zeol. No. 112. tab. 81. 

 fig. 112. 



Strombiformis major rubro lutescens aut pullus : anfractibus duabus 

 carinis sive striis acutis insignitis. Bicarinatus. s. 

 Torcular. Da Costa. Br. Conch, p. 110. 44.— 

 Tab. 6. fig. 3. 



