vi CONTENTS. 



XXX. Some Account of the Spiral Tubes or ILigaments in the 

 Genus Terebratula of Lamarck, as observed in several Spe- 

 cies of Fossil Shells. Bi/ Mr. James Sowerhy, F.L.S. p. 514 



XXXI. On the Use of the Pedes scansorii of Birds ; in a Let- 

 ter to the Rev. William Kirhy, F.R.S. and L.S. By the 

 Rev. Revett Sheppard, F.L.S. - - - - p- 517 



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- 520 



XXXIII. Remarks on the Changes of the Plumage of Birds. 

 By the Rev. William VVhitear, of Starsion in Norfolk. 

 Communicated by Joseph Sabine, Esq., F.R.S. and L.S., 



^■c. - - - - p. 524 



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, F.R.S. 



and L.S. - p. 527 



XXXV. Characters and Description q/"LYELLTA, 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 Buxbaumia. By Robert Brown, Esq. 

 F.R.S., Libr. L.S. - - - - - - p. 560 



XXX VI. Extracts from the Minute-Book of the Ldnnean So- 

 ciety of London ------ p. 584 



Catalogue of the Library of the Linnean Society. Continued 



from Page 426 of Vol. XL of the Society's Transactions p. 590 



List of Donors to the Library of the Linnean Society, 

 Donations to the Museum of the Linnean Society. 



TRANS- 



