MARINE MOLLUSCS. 261 
Venus subcordata.—Falmouth. (Montagu. ) 
Venus cassina.—Rather rare. 
Venus reflexa.—Not uncommon in estuaries, &c. 
Venus fasciataA—Not uncommon. Falmouth, 
common. (J.C. B.) 
Venus granulata—Devon and Cornwall. 
Venus rugosa. —Not uncommon. 
Venus gallina.—Rather common. 
* Venus pallida.— Dawlish. 
Venus undata.—Common. 
Venus aurea.—Rather rare. | 
Venerupis perforans.—Rather rare. Usually in 
lime-stone, but I have also found it in sandstone. 
Does the solvent therefore vary in individuals ? 
Venerupis irus.—Rare. Thrown up at Bovisand, 
(Miss Hook.) 
Venerupis pullastra.—Extremely common in the 
mud of inlets, also in deep water. “* Hens” vulgo. 
Venerupis decussata.—Not uncommon in inlets. 
Venerupis virginea.—Rather rare. Falmouth, 
not uncommon. (J. C. B.) 
* 'Teredo bipinnatax—Exmouth. (Turton.) 
* 'Teredo malleolus.—Torbay. (Turton.) 
Teredo navalis.—“ Ship worm.” Common. The 
operations of this animal on the piles of Teignmouth 
Bridge have caused most serious injury, and in one 
part the fabric has broken down. 
* 'Teredo nana.—Torbay. (Turton.) 
* Xylophaga dorsalis.——Torbay. (Turton.) 
Pholas lamellatanx—Not uncommon. Plymouth. 
(J. C. B.) 
* Pholas tuberculatus.—Torbay. (Turton.) 
Pholas dactylus.—‘* Perce stone.” Common. 
A deal of the Breakwater in Plymouth Sound is 
pierced by this animal, and in many parts so exten- 
sively as to render the stone like net-work. 
Pholas crispata——Plymouth. (J.C. B.) 
Pholas candidus.—Torbay, &c. 
