On the Teredo utriculus of Gmelm. 25 



pare Bowerbank's species with his own, I find it advantageous 

 to review Carter's essay from my point of view, so that in the 

 future any one may be enabled to make use of it. 



For any one who holds views similar to those of Polejaeff, 

 Vosmaer, and myself, this review will be most welcome, as I, 

 in possession of extensive collections and working the subject 

 on the spot, am best able to judge. 



III. — On the Teredo utriculus of Gmelin^ with Remarks 

 vjpon other Ship-worms. By Sylvanus Hanley, F.L.S. 

 &c. 



Until lately this ancient species, founded upon a well-exe- 

 cuted drawing in Kammerer (Conch. Cab. Rudolst. t. i,), was 

 omitted, or neglected, in our lists of sea-shells. Of late it 

 has been cited as a synonym of the T. norvagicusoi Spengler, 

 a conclusion which my recent examination of a most magni- 

 ficent group acquired by me at Cannes from the wreck of a 

 submerged Italian ship does not confirm. It may, indeed, 

 be a variety, yet with differences in tube, valves, and pallets 

 so perceptible that the untrained eye (I mean as to shells) 

 of a portrait-painter immediately indicated them. I may 

 remark that the Fistulana corniformis of Lamarck (as picto- 

 rially defined by a reference to Favanne) seems identical • 

 the tube, at least, is closed at the broader end by a dome- 

 shaped covering (as in the genus Septaria, =Kuphus), which 

 with the bar-like stricture at the narrower extremity are the 

 principal features exhibited in Kammerer's plate. The 

 pallets are more leaf-like and with shorter stalks than in nor- 

 vagicus, the tube (besides its dome, which some say is 

 present, although I have not myself found it) in all adult 

 members of the genus is more fragile, and the thin valves 

 easily distinguishable by their outline, the fang or central 

 portion being broader and much shorter in proportion than 

 in the solid dark-skinned northern shell to which it has been 

 affiliated. The most striking character, however, is the large 

 space occupied by the finely sculptured triangular area, which 

 descends far down the broad fang. 



The species (or variety, if you will) is a southein form ; 

 but I obtained many young specimens (valves only) from 

 Guernsey, an outlying province of the Mediterranean fauna. 



