mth Characters of the Species in the British Museum, ^l 1 



TuBes cylindrical, thin ; shell ovate, globular ; front lobe nar- 

 row triangular, lower edge rounded, very finely concentrically 

 striated, central band thin ; hinder portion smooth, the hinder 

 dorsal edge ovate, expanded (not recurved) serving for the 

 attachment of the abductor muscles; internal tooth broad, 

 con)pressed sickle-shaped, at right angles with the inner side 

 of the shell. Pallets base short, setaceous end compressed, end 

 broad, pinnated and articulated. Sumatra : Mr. H. Stuchbury. 



Teredo carinata. n. 



Tubes long, cylindrical ; shell subglobular ; front lobe trian- 

 gular, lower edge straight, rather oblique, concentrically fur- 

 rowed ; medial band thin ; hinder portion concentrically wrin- 

 kled, posterior dorsal margin expanded, recurved, parallel with 

 the hinge; edge deeply keeled internally; internal tooth com- 

 pressed, curved, placed obliquely with respect to the inner sur- 

 face of the valve. Pallet base short, setaceous end compressed, 

 €nd broad, linear lanceolate, pinnately articulated. Sumatra : 

 Mr. H. Stuchbury. 



Teredo bipennata, Turt. Conch. Diet, f 28. 40. Teredo 

 navalis. Home, Phil. Trans, and Comp. Anat. ii. t. 43. (bad). 



Exactly like the latter in shape, but twice as large, and the 

 front lobe is rather larger, and the hinder portion nearly 

 smooth, and the inner edge is not so much keeled; and the 

 pallet differs in having a very long setaceous stern (6 inches 

 long), and in the end being short and pinnately articulated, 

 with the ends of the joint long and filiform. " Tube thick, 

 strong, without any transverse concamerated partitions." Tur- 

 ton. Drifted wood, British Channel. J. Bulwer, Esq. 



In the above disposition I have studiously avoided giving 

 any new names to the species, which is too much the fault of 

 modern works. 



In this arrangement of the genus, I have united four 

 genera of Lamarck, but they appear to have been founded 

 on very slight grounds. 



I am informed by Professor Blainville, that our Teredo is 

 not the Teredo navalis of French naturalists, and that he has 

 called the one here described 7'. nigra. I am certain that is the 

 one figured by the authors to which 1 have referred, and the 

 older figures are so bad that it is impossible to determuie 

 wlietlier theirs is distinct. 



The Teredo dorsata is a kind ol' Pholas, being destitute of 

 any tube, and being jirovidcd with back-valves. It is per- 

 liaps the link that connects Uie two genera. 



LXIX. Meteorological Register kept at Fitnchal, in Madeira^ 

 in the Year 182fj; Sfc. Jiij C. IIeineken, M.D. 



[Concluded from p. 376.J JULY 



