Mr. Jeffreys’ 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. 
Hab. Straits of Korea; 63 fathoms. 
This species is smaller than C. Pelez, 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 lire 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 mm 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. rh 
F.R.S. 
TEREDO Auctorum. 
A. Having simple pallets (claustra, operculi vice fungentia—‘“‘oper- 
cula,” Lovén). 
1. T. Norvagica, Spengler. 
Bruma delle navi, Vallisnieri. 
T. navium, 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, e}. 
T. Senegalensis, Laurent. 
Var. T. divaricata, Fischer. 
Hastrat: 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. megotarat, Hanley. 
Bruma dell’ oceano, Vallisnieri. 
T. oceani, Sellius. 
T. dilatata, Stimpson. 
Hasirat ; in floating wood thrown up on the coast ; Swansea 
