S06 MOLLUSCA. PECTINIBRANCHIA. Cingula. 
nata, Walk. Test. Min. 13. t. ii. f. 47-— T. cost. Adams., Linn. Trans. 
iii. 65. t. xiii. f. 13-14. Mont. Test. Brit. 311. t. x. f. 6 Common on 
the English shores, on fuci ; rare in Scotland, 
Length x%ths of an inch ; breadth about ^oth ; white, glossy ; whorls a lit- 
tle rounded ; the ribs are strong, slightly waved ; on the body -whorl they end 
in a strong spiral rib, which extends from the body -lip, behind the p illar ^ to 
the outer lip ; this spiral rib is followed by a groove ; the spiral strise are most 
conspicuous between the ribs. 
S30. C. j)arva. — Wliorls five, strong, with transverse ribs, 
without spiral striae. 
T. quinque anfractibus subcarinatis apice purpureo apertura ovali. Walk. 
Test. Min. 12, t. ii. f. 43 — T. lacteus, Don. Brit. Shells, t. xc. — T. 
parvus, Mont. Test. Brit. 310. — Among fuci, common. 
Length upwards of |th of an inch, conical ; white, brown, or tinged with 
purple ; whorls rounded, with about twelve obtuse ribs, sometimes reaching 
to the pillar, or only to the middle of the body-whorl ; aperture slightly ovate. 
Montagu, in his account of this species, refers to the Turbo atreus and T. sub., 
luteus of Adams, Linn. Trans, iii. 65. 
231. C. marginata. — Shell subcylindrical ; whorls six, finely 
striated spirally, with about six transverse ribs. 
Laskey, Mont. Test. Brit. Supp. 128. Wern. Mem. i. 406. t, viii. f. 13. 
— Hitherto found only at Guernsey and Dunbar. 
Length |ths of an inch ; breadth fths less ; white ; very strong, the ribs 
gradually becoming obsolete at the line of separation ; aperture patulous. 
232. C. reticulata. — Shell conical, having six, rounded, regu- 
larly reticulated spires, with a slight pillar-cavity. 
T. subumbilicalus quatuor anfractibus reticulatus, apertura subrotunda. 
Walk. Test. 9. t. ii. f. 32. — T. ret. Mont. Test. Brit. 322. t. xxi. f. 1. 
— Among shell-sand, rare. 
Length about y^^th of an inch ; breadth J^th ; white or brown ; aperture 
suborbicular ; the transverse strise do not appear on the lower part of the bo- 
dy-whorl, where the spiral strise are most conspicuous. The Turbo punctura 
of Montagu, Test. Brit. 320. t. xii. f. 2. appears to be the young of this species, 
or before the rib of the lip is formed ; the same also as Turbo retiformis. Walk. 
Test. Min. 20. t. ii. f. 37- 
233. C. confer a. — Shell conical ; whorls six, with about 
twelve transverse undulated ribs ; the interstices at the top of 
the whorls formed into small cavities. 
T. con. Mont. Test. Brit. 314. t. xv. f. 2. — Found by Mr Bryer, at 'Wey- 
mouth, rare. 
Length ^th of an inch f breadth fds less ; white ; the cavities of the top of 
the spires give the separating line a denticulated appearance ; the spiral strise 
are numerous and fine ; aperture oval, oblique, strongly marginated. 
234 C. dentic 2 ilata. — Shell conical; whorls six, with ten 
transverse straight ribs projecting at the top of each. 
Turbo dent. Mont. 315.-— Weymouth, Mr Bryer. — St Andrew’s, Miss Lam- 
bert. 
Length about |th of an inch ; breadth about one-half less ; white, subpel- 
lucid ‘, no spiral strise ; the ribs join the pillar-lip, covering the whole body- 
whorl ; aperture suborbicular ; pillar-lip with one or two tubercles at the base, 
adjoining the ribs. 
