﻿TEREDO.— Plate I. 



at the juncture, expanded towards the hiteral 

 margin, raised a little above the nmbo ; styles 

 horny, unequal, jointed ; one short, with long 

 stem ; the other long, with rather short stem. 



ToETON. British Bivalves. 



Hab. Ireland, Scarborough, &c. 



Species 4. (Fig. a, h, Mns. Haniey.) 



Teredo megotara. Ter. testa laid, rotimdatd, area. 

 anticd hreviusculd, margine dorsali reflexo, rrcwvo, 

 concavo ; auriculd posticd laid, elevaiim e.rpniisd. 

 supra umbones recurvd; palmtdis tt'slaceis, bre- 



vihun, siihquailratis, stipuld brevi, crassiuscuJd ; 

 iuhd artlcithitd. 



The e.xpanded Teredo. Shell broad, rounded, an- 

 terior area rather short, dorsal margin reflected, 

 recurved, concave ; posterior auricle broad, 

 raised, expanded, recurved above the nmboes ; 

 pallets shelly, sliort, rather square, stem short, 

 rather thick ; tube jointed. 



Hani.ey. Forbes and Haniey, Brit. Moll. 



Teredo dllatata. Stimpson. 



Teredo nana ? Turton. 



Teredo oecani ? Sellius. 



Hab. Herne Bay, Devonshire, Swansea. 



