124 Mr. Jeffrey s* Sytiopsis of British Species of Teredo. 



piles of Yarmouth Pier, with the next species (Jeffreys) ; in 

 fishermen's stakes, Heme Bay (Metcalfe). 



Although the valves in adult specimens bear a close resem- 

 blance to those of the following species, the pallets are unmis- 

 takably different ; and in the young the stria? on the anterior 

 auricle of the valves are much fewer, and consequently more 

 remote than in that species. Where both species occur together, 

 the present occupies the outer layers of the wood, while the 

 other penetrates into its recesses. Quatrefages discovered this 

 species at Guibuscoa, on the north coast of Spain ; and I noticed 

 it in some wood which M. Deshayes had taken on the Algerine 

 coast. The tube is a beautiful object, being jointed in an imbri- 

 cated manner, like the stalk of an Equisetum. 



9. T. marina, Sellius. 



Serpula Teredo, Da Costa. 



T. navis (Dentalium), Linn, in Fn. Suec. 



T. navalis, ej. Syst. Nat. 



T. Batava, Spengler. 



Habitat : in the piles of Yarmouth Pier, and too frequently 

 in the Medway and lower part of the Thames (Jeffreys). Rams- 

 gate Pier (Rev. Sir Charles Macgregor, Bart.). It is the Dutch- 

 men's pest ; and they do not appear to be favoured with any 

 other kind. 



Sellius used the binomial appellation throughout, although 

 the date of his valuable and interesting monograph is long 

 anterior to the time of Linnseus. It was Sellius, and not Adan- 

 son, who first indicated the affinity of Teredo to Pholas. 



10. T, spathafj n. s. 

 Tube rather long and nexuous, detachable, regularly jointed, 

 increasing rapidly from the extremity, inside which there are 

 a few transverse wrinkles and a sharp, but short, siphonal 

 ridge. Valves triangular, compressed, rather solid; body 

 smooth ; anterior auricle large, angle about 50°, striae exceed- 

 ingly numerous and fine ; middle area unusually large and 

 broad, beading very minute ; posterior auricle obtuse, small, 

 rounded and appressed, internal margin indistinct; fang 

 narrow and pointed; tubercle small and sunk; apophysis 

 narrow. Pallets spade-shaped, in the young state calyciform ; 

 stalk of the same length as pallet. 



Dimensions : length (of valves) ^/'; breadth nearly as much. 

 Habitat : with T. bipartita, in Cedrela odorata } at Guernsey 

 (Lukis). 



A pair of pallets is in the British Museum, from Miss Saull ; 

 and another pair is in the Collections of Natural History at the 



