S98 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. All. Aug. 162. Conch. 585. f. 43 — Turbo lit. Linn. 



Syst. Nat. i. 1232. Mmit. 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-yellow ; 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 Cr«(/ formation. We are inclined, in this instance, 

 to suspect, that some products of a deposition of modo-n marine diluvium have 

 been confounded with the genuine inmates of the Crag. 



186. T. peireus. — 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 /o^hs, 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 ; pUlar-lip remarkably broad, grooved anteaUy ; outer-lip thin ; body- 

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

 a little below high water-mark. 



187. T. 7-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 whoi'ls 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. juffosus. The colours of the animal are 

 usually plain — The form and mode of jimction 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, 

 wiih 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. fabalis. — " Subglobular, very obtuse, smooth, with 

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

 scure pale bands ; pillar and throat chesnut.'" 



Titrton, Zool. Jounu ii. 366, I. xii. f. 10 — On the rocks at Scarborough, 

 Mr Bean. 



