Mr. Jeffrey s' Synopsis of British Species of Teredo. 121 



subspirali, ad marginem posticam inclinato ; superficie liris radi- 

 antibus, interstitiis anguste clathratis, sculpta ; fissura lineari, 

 intus supra concamerata, extus lamellis lateralibus elevatis in- 

 structa ; apertura angusta, oblongo-ovali, margine crenulato, pos- 

 tice expanso, reflexo. 



Hah. Straits of Korea ; 63 fathoms. 



This species is smaller than C. Pelex, A. Adams, and is late- 

 rally compressed; and the vertex is subspiral, and posteriorly 

 deflexed so as nearly to reach the hinder margin. The inter- 

 stices of the radiating ribs or lirse are crossed by transverse or 

 concentric bars placed close together, so as to produce a nar- 

 rowly clathrate style of sculpture. Many specimens were ob- 

 tained, all of the same size and character, in company with 

 young and old specimens of Emarginula. When in the young 

 state, the fissure extends as far as the front edge ; and when 

 very young, these shells resemble, in respect of the emarginate 

 aperture, species of Emarginula. 



Shanghai, Feb. 1, 1860. 



XXII. — A Synoptical List of the British Species of Teredo, with 

 a Notice of the Exotic Species. By J. Gwyn Jeffreys, Esq., 

 F.B.S. 



Teredo Auctorum. 



A. Having simple pallets (claustra, operculi vice fungentia — "oper- 

 cu\a " Loven). 



1. T, Norvagica, Spengler. 



Bruma delle navi, Vallisnieri. 



T. naviunif Sellius. 



T. navalis, Montagu, and all other British conchologists except 

 Forbes and Hanley. 



Fistulana corniformis, Lamarck. 



T. nigra, Blainville. 



T. Bruguierii, Delle Chiaje. 



T. Deshaii, Quatrefages. 



T.fatalis, ej. 



T. Senegalensis, Laurent. 

 Var. T. divaricata, Fischer. 



Habitat : Channel Isles, in submerged wood (Lukis) ; Bud- 

 leigh Salterton, Devonshire, in the timbers of a steamer which 

 was wrecked between two and three years ago, and is now partly 

 uncovered at very low tides (Barlee). 



2. T. megotara-f, Hanley. 



Bruma delV oceano, Vallisnieri. 

 T. oceahi, Sellius. 

 T. dilatata, Stimpson. 



Habitat : in floating wood thrown up on the coast ; Swansea 



