30 



DONATIONS. 



A Description of the Shetland Islands, comprising an 

 Account of their Geology, Scenery, Antiquities, and Supersti- 

 tions. By Samuel Hibbert, M. D., F. R. S. E., &c. Pre- 

 sented by tbe Author. 



Memoir on the Tings of Orkney and Shetland. By the 

 same Author. 



Observations on the Theories which have beeen proposed 

 to explain the Vitrified Forts of Scotland. By the same 

 Author. 



Flora Batata, No. 108. By H. C. Van Hall. Presented 

 by the Author. 



TJie American Almanac and Repository of \ Useful Know- 

 ledge, for the Year 1837. Presented by the American Phi- 

 losophical Society. 



January 23. 



RICHARD GRIFFITH, Esq. in the Chair. 



Captain Portlock read a notice of the occurrence of 

 Anatifa Vitrea,* of Lamarck, in several localities on the 

 Irish coast. He commenced by enforcing the great impor- 

 tance of recording as quickly as possible the first discovery in 

 a new locality of any species of the animal or vegetable king- 

 dom, as tending to perfect the Fauna or Flora of the district 

 in which it is found ; and pointed out the value of such local 

 Faunae and Flora; in estimating the relations and mutual de- 

 pendencies of co-existing animals and plants, and affording 

 a basis of comparison by which future observers may be 

 enabled to test the probability of new organic beings occa- 



* Lepas fascicularis, of Ellis, Montague, and other authors ; Lepas dilata, of 

 Donovan. 



