298 MOLLUSCA. PECTINIBRANCHIA. Turbo. 



Gen. XLVII. TURBO.— Shell ovoid, the body-whorl oc- 

 cupying upwards of one-half of the length ; aperture with 

 the peristome incomplete retrally ; pillar-lip flattened. 



185. T. littoreus. Periwinkle. — Whorls five, separating 

 line shallow ; outer-lip joining the body at an acute angle. 



Cochlea fusca, List. An. Ang. 1(52. Conch. 585. f. 43— Turbo lit. Linn. 



Syst. Nat. i. 1232. Mont. Test. Brit. 301 — Common within tide-mark. 



Length about an inch ; breadth three quarters, various in colour, dusky, 



with lighter stripes, or with a white band, or orange-yello w ; apex blunt, nearly 



smooth or spirally striated ; animal striped with black, the tentacula annu- 



lated Extensively used as food. Mr Sowerby has figured a shell which he 



considers as identical with this species, and another similar to T. rudis, (Min. 

 Conch, t. 71-)» as from the Crag formation. We are inclined, in this instance, 

 to suspect, that some products of a deposition of modern marine diluvium have 

 been confounded with the genuine inmates of the Crag. 



186. T. petreus. — Whorls five, conical, nearly flat ; outer- 

 lip joining the body at an acute angle, and embracing a portion 

 of the whorl. 



Helix pet. Mont. Test. Brit. 403 — South coast of England. 

 Length about , 2 5 ths, breadth ^gth of an inch, of a dark brown colour ; des- 

 titute of spiral striae, but is marked transversely by irregular minute lines of 

 growth ; pillar-lip remarkably broad, grooved anteally ; outer-lip thin ; body- 



fip slightly convex This species, according to Montagu, lives on the rocks 



a little below high water-mark. 



-- 187. T. ?°udis. — Whorls five, rounded ; outer-lip thick, join- 

 ing the body nearly at right angles. 



Maton, Don. Brit. Shells, t. xxxiii. Mont. Test. Brit. 304 T. jugo- 



sus, ib. 586. Maton and Rackett, Linn. Trans, viii. 158 Common. 



Length and breadth nearly equal ; colour yellowish or brown ; separating 

 line deep. The surface of the whorls is, in some individuals, nearly smooth, 

 except by the markings of the lines of growth, constituting the T. rudis; 

 while, in others, the surface is grooved by spiral lines, the intermediate spaces 

 flat or sharp edged, becoming the T, jugosus. The colours of the animal are 



usually plain The form and mode of junction of the outer-lip with the 



body seem the distinguishing features of the species. 



188. T. tenebrosus. — Whorls five, rounded ; outer-lip thin, 



joining the body-whorl nearly at right angles. 



Mont. Test. Brit. 303. Turt. Conch. Diet. 197 — On the English and 

 Irish coasts. 



Length fths, breadth |ths ; separating line distinct ; colour dark purple, 

 with yellowish spiral bands; lines of growth minute, finely or coarsely striat- 

 ed spirally This species is found on mud near high water-mark, and in 



brackish marshes. 



189- T. faballs. — " Subglobular, very obtuse, smooth, with 

 three hardly produced volutions, of a chesnut colour, with ob- 

 scure pale bands ; pillar and throat chesnut."" 



Tin-ton, Zool. Journ. ii. 3C6. t. xii. f. 10. — On the rocks at Scarborough, 

 Mr Bean. 



