PLATE VIll. 
Fig. 1, 2, 3. PHOLAS dactylus. 
Pholas Dactylus Lam. Sysl. v. p. 444 — Mont. Test. Brit. p. 20, — Mat. and Rack, in Lin. Tr. viii. p. 30. — 
Donov. Brit. Sh. pi. 118, 
Fig. 5, 8. PHOLAS callosa. 
Pholas callosa^ Lam. Si/st. v. p. 445. 
P. striata, Mont. Test. Brit. p. 26, — Donov. Brit. Sk. pi. 117' — Mat. and Rack, in Lin. Tr. viii. p. 3. 
Fig. 4, 6, 7, 9. PHOLAS papyracea. 
Found on the west coast of Devonshire. In the cabinet of Dr Goodallj Provost of Eton College, and also 
in Lady Jardine's Cabinet. Found by my friend Lieutenant-General Bingham on the north coast of Devon. 
The shells of this genus have the faculty of boring into limestone, slate-clay, &c. An interesting account of 
the means by which they perform this operation is given by my friend Mr kStark in the Transactions of the 
Royal Society of Edinburgh, Vol. x. Part ii. 
The phosphorescent properties of this animal are no less remarkable. It contains a liquor which shines with un- 
common splendour in the dark, and illuminates whatever it touches. 
