Zoology of the Falkland Islands. 



m\ 



As the shell is above the table on the south side of the east 

 and west points, the plane of no attraction dips to the south. 



At St Helena, the dip of the needle being south, I deter* 

 mined on following the same process which had succeeded in 

 China, but contenting myself with the 80th and 85th degrees, 

 as on the 75th degree it became difficult to place the shell ac- 

 curately in the centre of the table. I found the inclination of 

 the plane to be as follows. The dip of the needle being 16° 

 32' south, 



Radius of the circle 10.55 inches. Diameter of the shell 

 12-68 inches. 



As the shell is below the table on the south side of the east 

 and west points, the plane of no attraction dips to the north. 



My various duties prevented the repetition of the experi- 

 ments a second time, either at China or St Helena ; and it 

 is necessary to remark, that I cannot depend on the accuracy of 

 my dipping needle, as in London, previous to our sailing, it 

 showed the dip 68°54' north, which was 1° 36' less than the 

 truth. 



The vibrations of the needles entered in the journal, were 

 for the purpose of calculating the dip by the method mention- 

 ed in Mr Barlow*s work, but little reliance can be placed on 

 them, from the difficulty of keeping the magnetic power always 

 the same, although, when not in use, the needles were always 

 attached to strong magnets. 



Art. XXXV. — Notice respecting the Zoology of the Falkland 

 Islands. * By M. Garnot. 



In the course of the circumnavigation of the globe by the 

 corvette la Cuquille from 1822 to 1825, the natural history 

 * Translated From the Annates des Sciences Naturelks. 

 VOL. VI. NO. II. APRIL 1827- X 



