2s CONTENTS. 
XXX. Some Account of the Spiral Tubes or Ligaments in the 
Genus Terebratula of Lamarck, as observed in several Spe- 
cies of Fossil Shells. By Mr. James Sowerby, F.L.S. p. 
XXXI. On the Use of the Pedes scansorii of Birds; in a Let- 
ter to the Rev. William Kirby, F.R.S. and L.S. By the 
Rev. Revett Sheppard, F.L.S. - - - - p. 
XXXII. An Account of a new Species of Gull lately disco- 
vered on the West Coast of Greenland. By Joseph Sa- 
* 
bine, Esq. F.R.S. and L.S. $c. - - ^ - p 
XXXIII. Remarks on the Changes of the Plumage of Birds. 
By the Rev. William Whitear, of Starston in Norfolk. 
Communicated by Joseph Sabine, Esq., F.R.S. and L.S., 
Ge, - . x - UR 
XXXIV. A Memoir on the Birds of Greenland; with De- 
scriptions and Notes on the Species observed in the late 
Voyage of Discovery in Davis's Straits and Baffin’s Bay. 
. By Capt. Edward Sabine, of the Royal Artillery, FRS. 
and LS. - à - p 
XXXV. Characters and Description of LvELLtA,a new Ge. 
nus of Mosses, with Observations on the Section of the Or- 
der to which it belongs; and some Remarks on LEPTO- 
sTOMUM and Buxsaumia. By Robert Brown, Esq. 
F.R.S., Libr. L.S. - - = Te * alp. 
XXXVI. Extracts from the Minute-Book of the Linnean So- 
ciety of London - - a FOR 
Catalogue of the Library of the Linnean Society. Continued 
from Page 426 of Vol. XI. of the Society's Transactions p. 
List of Donors to the Library of the Linnean Society. 
Donations to ihe Museum of the Linnean Society. 
520 
524 
527 
