32 Mr. Jeffreys on Biitish Mollusca, 



reason to believe Philippi was in several instances deceived by 

 fishermen ; and in the ' History of the British Molkisca ' it is 

 stated (as I believe, with truth) that Montagu and Turton were 

 often similarly misled. I do not think that many spurious spe- 

 cies have been introduced by means of wrecked ships, though 

 perhaps a small percentage may be thus accounted for. Mr. 

 Hyndman, in his Report last year to the British Association, of 

 the proceedings of the Belfast Dredging Committee, states that 

 dead specimens of Cyprcea moneta had been frequently found on 

 the shore near Bangor, county Down, and he adds that there 

 was a tradition that a ship engaged in the slave trade was wrecked 

 there. Such cases are, however, 1 apprehend, very rare. 



I am indebted to Dr. Lukis and Mrs. CoUings for the accurate 

 illustrations which accompany this paper ; the former as to the 

 shells, and the latter as to the lingual ribands or " tongues '^ of 

 some of the Gasteropods. The representation of the hinge and 

 teeth of Limopsis pellucida, which is altogether only -^^ih of an 

 inch in length, and of the tongue of Euomphalus nitidissimus, an 

 animal scarcely half a line in diameter, may justly be reckoned 

 among triumphs of microscopic art. 



Acephala Lameliibrancliiata. 



Teredo Norvagica, Forbes ^ Hani. Brit. Moll. vol. i. p. 66. 

 Weymouth {Mr. Thompson) ; in a log of wood at Penzance {Rev. 

 Mr. Norman). 



T. megotara, i. 77. Mr. Norman informs me that Mr. Frederick 

 Burton obtained this species last year, from wood thrown up near 

 Newhaven. 



T. malleolus, i. 84. In cork, Falmouth {Rev. Mr. Norman). 



Pholas crispata, i. 114. Weymouth, by Mr. Metcalfe {Mr. 

 Thompson) ; and Mr. Norman says that large valves, fully 3 inches 

 in length, are frequently thrown up on the shore at Hunstanton in 

 Norfolk. 



P. Candida, i. 117. In the decayed wood of a submarine forest at 

 Hunstanton ; very abundant {Rev. Mr. Norman). 



Mya arenaria, i. 168. Weymouth, by Mr. Metcalfe {Mr. Thomp- 

 son). 



Sphaenia Binghami, i. 190. A shell, sent by Professor Loven to 

 Mr. Alder as ^' Mya Swainsonii,^^ and forwarded by the latter to me 

 for examination, belongs to this species, and not to the young of 

 Mya arenaria^ which Turton described under the name of Sphenia 

 Swainsoni. 



Nesera cuspidata, i. 195. Tiberi, in his recent pamphlet entitled 

 " Descrizione di alcuni nuovi Testacei viventi nel Mediterraneo," has 

 separated the Corbula cuspidata of Philippi from our ordinary form, 

 under the name of Necera renovata. Both inhabit the Mediterra- 

 nean. The first is thinner and more slender than the last, and it 



