308 MOLLUSCA. PECTINIBRANCHIA. CmouLA. 
Length |ths of an inch ; breadth about |ths ; conic, smooth, subpellueid, 
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. Montagu compares this species to Limnea fossaria^ to which, 
it may be added, some of the numerous varieties of Turbo quadrifasciatus bear 
a close resemblance, and with which the present species is probably con- 
nected. 
S42. C.pulla . — Whorls five, rounded, the first large ; striated 
or spotted with pink. 
Turbo pullus, Linn. Syst. i. 1233. Don. Brit. Shells, t. ii. 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 ; Avhorls 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. ulvce . — Whorls five to seven, nearly flat ; outer lip 
even retrally. 
Turbo ulvse, Penn. Brit. Zool. iv. 132. t. Ixxxvi. f. 120. Mont. Test. Brit. 
313.— In muddy inlets, common. 
Length fths, breadth ith 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 striae from the 
inner margin. 
244. C. subumbilicata . — Whorls five to seven, rounded, the 
first occupying above half the length of the shell. 
Turbo sub. Mont. Test. Brit. 316. — About the roots of fuci, common. 
licngth -f^jths, breadth y^gth of an inch ; greenish-grey, smooth, glossy ; 
whorls well defined by the separating line ; apex obtuse ; aperture suborbi- 
cular, the outer lip rounded ; the piUar-lip reflected, forming behind a small 
cavity. 
245. C. interrupta . — Whorls five or six, slightly rounded, 
with interrupted spiral brown bands. 
Turbo in. Adams, Linn. TranSi v. 3. t. i. f. 16, 17* Mont.. Test. Brit. 
329. — On fuci, common. 
Length about |th of an inch ; breadth |ds less ; pellucid, glossy, pale 
brown ; the coloured bands frequently form rows of oblong spots ; aperture 
wide ; outer lip rounded, very thin ; pillar-lip scarcely reflected. 
246. C. rubra . — Whorls five, rounded, translucent, glossy, 
brown, with a fine separating line. 
Turbo ruber, Adams, Linn. Trans, iii. 66. t. xiii. f. 21. Mont. Test. Brit. 
320 — At the roots of fuci, not uncommon. 
I.ength |th of an inch ; breadth |ds less ; the pillar distinctly visible from, 
the outside; aperture suborbicular ; pillar-lip slightly reflected. 
247. C. vitrea. — -Whorls four, rounded, nearly transparent, 
white. 
