14 



nixvalis. 

 1. 



CONCHYLIA— I>/rHF«4. 2. 



mantle, or by an outer cuticle or membrane which invests the 

 whole animal : and this fold perishes with the animal, leaving the 

 valves to fall asunder, or to be connected by a mere film. 



Teredo valvis postice auriformibus, allerd denticulo ciuvo mar- 



nali supra denlem . 

 Shell with the valves ear-shaped behind, one of them with a 

 curved denticle on the margin above the teeth. 

 Tab. nost. 2. fig. 1 to 3. 

 Teredo navalis. Linn. Syst. Nat. p. 1267. 

 Gmelin, Syst. p. 3747. 

 Turton, Linn. Syst. iv. p. 609. 

 Pennant, Brit. Zool. iv. p. 367. 

 Montagu, Test. Brit. p. 27, and suppl. p. 7. 

 Home, Phil. Trans. 1806, p. 276, tab. 12 



and 13. 

 Turton, British Fauna, p. 202. 

 liinn. 2Vans. viii p. 249. 

 Donovan, Brit. Shells, v. tab. 145. 

 Dorset Catal, p. 60, tab. 18, fig. 12. 

 Dillwyn, Descript. Catal, p. 1089. 

 Turton, Conch Diet. p. 183. 

 Serpula Teredo. Da Costa, Brit. Conch, p. 21. 

 Idus. nost. In timber exposed to their action in salt water. 



Shell about three quarters of an inch in diameter, with the 

 valves triangular and forming a circular hemispiiere when closed 

 together, elegantly striate in various directions, each with a trian- 

 gular projection in front bending a little inwards, and with an 



