Venus. 
MOLLUSCA. VENERID^. 
447 
Diameter sometimes reaching two inches and a half ; brownish or yellow- 
ish white, with faint red rays. It is much more compressed than either of 
the preceding, especially towards the ventral margin, and the depressed space 
at the ligament more distinctly marked on the right valve. 
52S. Y.fasciata. — Compressed, with remote rounded smooth 
transverse ribs. 
V. paphia, Pult. Dorset. 33. Mont.Test. Brit. 110. — V. fasc. Don. Brit. 
Shells, V. 170 . Turt. Biv. Brit. 146. t. viii. f. 9 — Not uncommon from 
Devon to Zetland. 
Diameter about an inch ; colour reddish, with darker rays ; beaks promi- 
nent ; depression before the beaks much raised in the middle ; dorsal margin 
behind the beaks sloping rapidly ; ridges sometimes divided into groups by 
distant deeper furrows. — This species has been frequently confounded with 
V. Paphia of Linnseus, a West Indian shell, from which, however, as has been 
well observed by Donovan, it differs in the structure of the concentric ridges, 
which, in V. Paphia, “ are remarkably thick and prominent in the middle, but 
in approaching each extremity, become suddenly obtuse, and are then conti- 
nued in an attenuated ridge.” 
524. V. cancellata.— Shell round, heart-shaped, angular on 
the posterior side, with remote transverse plates, which are close- 
ly cancellated, and the impression before the beaks heart-shaped. 
Linn. Syst. i. 1130. Turt. Biv. Brit. 144. t. x. f. 3. — Shores of Guernsea. 
Diameter about half an inch ; white, with sometimes a rosy tinge ; beaks 
prominent ; ridges nine or ten, remote, membranaceous, slightly tubercled 
posteriorly, the interstices with close set rib-like longitudinal ridges. 
525. V. subcordata. — Subcordate, slightly truncated anteal- 
ly ; with strong longitudinal costated strise, and remote transverse 
ridges. 
Mont. Test. Brit. 121. t.iii. f. 1. Turt. Biv. Brit. 144 — Found by Mon- 
tagu in sand from Falmouth Harbour. 
Diameter a quarter of an inch ; white, strong ; the decussations are long 
squares ; the beaks turning inwards, and much incurvated ; cartilage margin 
smooth, sloping rapidly. 
526. V. granulata.—Sheh suborbicular, granular ly reticula- 
ted, by the longitudinal ribs being crossed by rather shallow 
concentric grooves. 
Don. Brit. Shells, t. Ixxxiii. Mont. Test. Brit. 122. Turt. Biv. Brit. 
144. — Shores of Deyon and Cornwall and Frith of Forth. 
Length |ths of an inch, breadth 1 inch ; thick ; white, with purple blotches ; 
beaks prominent. 
527. V. Dysera. — Subtriangularly heart-shaped, remote con- 
centric ridges, with longitudinal striae in the interstices and 
slightly marking the ridges. 
Pectunculus maculatus. List. Conch, t. cclxxvii. — V. Dys. Linn. Syst. i. 
1130. Mont. Test. Brit. Sup. 42. Turt. Biv. Brit. 147. t. ix. f. 4.— . 
Frith of Forth, IMr Laskey. — Shores of Guernsey, Dr Turton. 
Diameter about an inch ; white, variously marked with brown ; ridges 
about twelve in number; beak small, inclining with a depression at both ex- 
tremities. 
