Brit.* vol. I, yi. 114. C. I. Flem. Brit. An., p. 443. 
Scarcely abundant; but taken in Trawls and on the lines 
of fishermen. 
C. MINIMA. Venus M. Monl. Test. Brit., vol. 1, p. 112 1 
pi. 3, fig. 5. C. M. Flem. Brit. An., p. 444. 
Montagu says, “ It is a rare species, which we have only 
found sparingly at Falmonth, dredged from the harbour, 
alive.” 
CYTHERZEA. 
GENERIC CHARACTER : The valves equal, the shell 
suborbicular, triangular or transverse, four cardinal teeth 
on the. right valve, three of them diverging, approaching 
at their base, and one, perfectly insulated, situated near 
the lunula. Three diverging cardinal teeth on the other 
valve, with a rather distant oval pit, parallel to the margin. 
No lateral teeth. 
* C. CHIONE. Venus C. Turt. Lin. Mont. Test. Brit., 
vol. 1. p. 115. Flem. Brit. An., p. 144. Queens. Common. 
C. OVATA. Venus Ovata. Pen. Brit. Zo., vol. 4, pi. 56, 
fig. 56. Flem. Brit. An., p. 445. Dead shells common. 
C. REFLEX A. Venus R. Flem. Brit. An., p. 446. Rare. 
I possess a single valve, obtained from the byssus of a 
Pinna from deep water. 
I have classed this species in the genus Cytberaea, front 
the circumstance that my specimen was thus marked, by a 
gentlemen well acquainted with conehology. In many in- 
stances, indeed, the distinctions of these genera cannot be 
striclly preserved ; and therefore I venture to place here a 
species, with which, without close investigation, it may be 
confounded. This is the Venus Prideauxiana, as marked by 
the same kind friend. The description of C. Reflexa is : 
The shell compressed, length (from beak to margin) 1| inch ; 
width 1§ inch; dorsal margin behind the beak approach- 
ing to straight; concentric ridges rising into thin plates, 
their edges bent upward on the forepart, waved and deflected 
towards the dorsal margin. Colour pale brown. On tb e 
inner margin a fine crenulation, not extended to the border. 
V. PRIDEAUXIANA is in length eighths of an inch 
from beak to margin, and 91 eighths broad : dorsal margin 
about equally straight as the former, but longer, by which 
the circular sweep is less. The lunula of the former i' s 
produced into a Line that joins, with scarcely an interrup- 
tion, the margin with the beak ; whereas in the latter it > s 
narrow and retiring. The concentric ridges, though in 3 
smaller shell, are more numerous, and far less elevated- 
Colour pale brown, with two or three obscure marks 
the longitudinal lines so often seen on the Veneres. Whh' 
in, the margin of the lunula is finely crenulated, as is als° 
