308 MOLLUSC A. PECTINIBRANCHIA. Cingula, 



Length |ths of an inch ; breadth about |ths ; conic, smooth, subpellucid, 

 horn-coloured ; whorls deeply divided by the separating line ; apex moderate- 

 ly pointed ; inner lip forming an angle about the middle, behind which is a 

 narrow cavity. Moritagu compares this species to Limnea fossaria, to which, 

 it may be added, some of the numerous varieties of Turbo quadnfasciatus bear 

 a close resemblance, and with which the present species is probably con- 

 nected. 



242. Q.pulla. — Whorls five, rovinded, the first large ; striated 

 or spotted with pink. 



Turbo pullus, Lbxn. SysL i. 1233. Don. Brit. Shells, t. iL f. 2-6. Mont. 

 Test. Brit. 319.— On fuci, on the English and Irish coasts. 

 Length |ths of an inch ; breadth one-half less, smooth, glossy, finely va- 

 riegated with pink, purple, or brown ; strong ; whorls decreasing rapidly, deep- 

 ly divided by the separating line ; aperture suborbicular ; pillar-lip reflected, 

 and forming behind a small cavity ; operculum strong, thick, testaceous, very- 

 convex, white and smooth externally ; the interior part, when separated from 

 the animal, is a little concave, and has a small and singular spiral turn near 

 one end. 



243. C. ulvcB. — Whorls five to seven, nearly flat ; outer lip 

 even retrally. 



Turbo ulvse, Penn. Erit. Zool. iv. 132. t. Ixxxvi. f. 120. Mont. Test. Brit. 

 313. — In muddy inlets, common. 

 Length gths, breadth |th of an inch ; corneous, thick, opake ; whorls with 

 a distinct separating line, and slightly wrinkled across by lines of growth ; 

 outer lip nearly straight retrally ; pillar-lip reflected and forming behind a 

 slight longitudinal cavity ; operculum radiated with arched strire from the 

 inner margin. 



244. C. suhumbilicata. — Whorls five to seven, rounded, the 

 fi^rst occupying above half the length of the shell. 



Turbo sub. Mont. Test. Brit. 31 G About the roots of fuci, common. 



liOngth Y^'jths, breadth j'jth of an inch ; greenish-grey, smooth, glossy ; 

 whorls well defined by the separating line ; apex obtuse ; aperture suborbi- 

 irular, the outer lip rounded ; the piUar-lip reflected, forming behind a small 

 cavity. 



24-5. C. interrupta. — Whorls five or six, slightly rounded; 

 with interrupted spiral brown bands. 



Turbo in. Adams, Linn. Trans, v. 3. t. i. f 16, 17- Mont. Test. Brit. 

 32!>. — On fuci, common. 

 I>ength about |th of an inch ; breadth gds less ; pellucid, glossy, pale 

 brown ; the coloured bands frequently foiTn rows of oblong spots ; aperture 

 wide ; outer lip rounded, very thin ; pillar-lip scarcely reflected. 



246. C. ruhra. — Whorls five, rounded, translucent, glossy, 

 brown, with a fine separating line. 



Turbo ruber, Adams, Linn. Trans, iii. G6. t. xiii. f. 21. Mont. Test. Brit. 

 320 — At the roots of fuci, not uncommon. 

 Length |th of an inch ; breadth sds less; the pillar distinctly visible from 

 the outside ; aperture suborbicular ; pUlar-lip slightly reflected. 



247. C. vitrea. — Whorls four, rounded, nearly transparent, 

 white. 



