27 
'he circular margin of the shell, but less finely and regu*. 
iarly than the former. 
yt this shell also, l have seen bnt a single valve, obtained 
tr °m the byssus of a Pinna from deep water. 
VENUS. 
G EXER/C CHARACTER: The shell with the valves 
^ual, sides unequal, transverse or suborbicular. Three 
Approximate cardinal teeth in each valve; the lateral teeth 
diverging at the summit, ligament external, covering the 
.scutcheon. 
' CASSINA. V. Erycina, variety. Pen. Brit. Zo., vol. 
pi. 54, fig. 48. V. C. Pleui, Brit. An., p. 446. Not 
» c °mmon. 
V - VERRUCOSA. Turt. Lin. V. Erycina. Pen. Brit. 
“ 0, » vol. 4, pi. 54, fig. 48. V. V. Mont. Test. Brit., 
lj p. 1 12. Borlase’s Nat. H ist. Corn. pi. 27, fig. 32. 
lem. Brit. An., p. 440. Common on the shores east of 
'c Lizard, and abundant in the soil dredged front 
t *almoulh harbour. 
• FASCIATA. V. Paphia. Turt. Lin. Mont. Test.. 
^ r it., vol. 1, p. 110. V. F. Flem. Brit. An., p. 447. 
common. It frequently creeps into crabpots in search of 
* bait. 
• GtALLINA. Turt. Lin. V. Striatula. Mont. Test, 
rit., vol. 1, p. 113. V. G. Flem. Brit. An., p. 418. 
y Common ; and with the same habits as the last. 
' I jT BCOR DATA. Mont. Test. Brit., vol. 1, p. 121, 
P • 3 > %• 1. Flem. Brit. An., p. 447. Found by Mon- 
V la S' 1 * n sand from Falmouth harbour. 
•WUNULATA. Turt. Lin. Mont. Test. Brit., vol. 1, 
P- 122. Flem. Brit. An., p. 447. Scarce; found by 
V | entagu at Falmouth. 
o N JDATA. Turt. Lin. Pen. Brit. Zo., vol. 4, pi. 55, 
S- 51. Mont. Test. Brit., vol. 1, p. 117. Flem. Brit. 
n -i p. 448. Not common. Montagu found it at Fal- 
* JJ'°uth. 
• AUREA. Turt. Lin. Mont. Test. Brit., vol. 1, 
b’e^ 29 ’ Flem. Brit. An., p, 440. This shell seems to 
Hj loc ally common. Montagu found it in sand from Fal- 
°uth harbour; from whence also I have obtained it, and 
,ro «> St. Auslle bay. 
c CARDIACEA. 
ge Qe r | Ina l teeth irregular, either in form or situation, and 
a v accompanied by one or two lateral teeth. 
g £V£ 
CARDIUM. 
CHARACTER: Shell with equal valves, some- 
heart shaped ; beaks prominent ; internal margin of 
