124 Mr. Jeffreys’ Synopsis of British Species of Teredo. 
piles of Yarmouth Pier, with the next species (Jeffreys); in 
fishermen’s stakes, Herne 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 striz 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. 7. marina, Sellius. 
Serpula Teredo, Da Costa. 
T. navis (Dentalium), Linn. in Fn. Suee. 
T. navalis, ej}. Syst. Nat. 
T. Batava, Spengler. 
Hasirat: 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 Linneus. It was Sellius, and not Adan- 
son, who first indicated the affinity of Teredo to Pholas, 
10. 7. spathat, n. 8. 
Tube rather long and flexuous, 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°, striz 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) ;6,"; breadth nearly as much, 
Hasirat: with 7. bipartita, in Cedrela odorata, at Guernse 
(Lukis). ues 
A pair of pallets is in the British Museum, from Miss Saull ; 
and another pair is in the Collections of Natural History at the 
