IN THE PLIOCENE DEPOSITS. 101 



This is certainly not the F. lamellosus of Lamark, as it differs in 

 the ribs being less numerous, and in their being more inflected:*— J?. 



The above description of Mr Brown, applies to the shell in a 

 young state, and it was named by him Fusus imbricatus. But the 

 imbrications of the ribs disappear when the shell attains its full size, 

 in which state it cannot be distinguished from the F. Peruvianus 

 of Lamarck, or from the crag fossil of the same name. In Plate II. 

 the shell is represented in its different states, fig. 5 to 9. It occurs in 

 a recent state at the North Cape. M. Deshayes observes, that the 

 name F. Peruvianus was given to it by Lamarck, in consequence of 

 his ignorance of its habitat. It is never found in Peru. It also occurs 

 in a fossil state in Sweden and Denmark. — S. 



Found at Dalmuir by Thomas Thomson, Esq. 



3. TURITELLA CINGULATA. 

 Plate I. Fig. 23. 



Shell strong, taper ; volutions but slightly elevated, each furnished 

 with three strong, equidistant, depressed spiral ribs of a very deep 

 chocolate or blackish-brown colour, withian intermediate reddish- 

 brown, fine, thread-like line between each of them ; aperture nearly 

 orbicular ; base somewhat flattened, with numerous brown, concen- 

 tric lineations ; pillar-lip white, and reflected on the columella. — B. 



Found in the Clay, near Glasgow. See note p. 76. 



I suspect I have been deceived in this shell, which was given to 

 me by a workman. — S. 



4. TURBO EXPANSUS. N. S. — Smith. 

 Plate I. Fig. 12, 13. 



Shell strong, consisting of fine volutions ; spire very short, well 

 defined by the suture, and terminating in a somewhat pointed apex ; 

 aperture suborbicular ; outer lip thin and much expanded ; inner 

 lip thick, strong, and slightly concave ; base flattened in front ,* the 

 whole shell wrought with very minute spiral striae, every alternate 

 line being smaller than the others, and these are thickly crossed by 

 longitudinal lines of growth, producing an undulated appearance in 

 the spiral striae, which can only be seen by the aid of a lens ; colour 

 reddish-orange. 



This shell may be mistaken for the young of the Turbo rudis, 

 but is at once distinguished by the much greater expansion of the 

 outer lip, and the fineness of the striae, those of the rudis being much 

 coarser and devoid of the finer intermediate striae. — B. 



