274 P. L. Sclater: 



88. Reise durch die La Plata-Staaten , mit besonderer Rücksicht auf die 

 physische Beschafienheit und den Culturzustand der Argentinischen 

 Republik. Ausgeführt in den Jahren 1857, 1859, 1859 und 1860. Von 

 Dr. Hermann Burmeister. 2 volb. Halle, 1861. 



90. List of Birds collected at Conchitas, Argentine Republic, by Mr. William 



H. Hudson. By P. L. Sclater, M. A., and Osbert Salvin, M. A, P. 

 Z. S. 1868, p. 137. 



91. Second List of Birds collected at Conchitas, Argentine Republic, by 



Mr. William H. Hudson, together with some Notes upon another col- 

 lection from the same locality. By P. L. Sclater, M. A., and Osbert 

 Salvin, M. A. P. Z. S. 1869, p. 158. 



92. Third List of Birds collected at Conchitas, Argentine Republic, by Mr. 



William H. Hudson. By P. L. Sclater, M. A., and Osbert Salvin, M, A. 

 P. Z. S. 1869, p. 631. 



93. Letter on the Ornithology of Buenos Ayres. By William H. Hudson, 



C. M. Z. S. P. Z. S. 1870, p. 87. 



94. Second Letter on the Ornithology of Buenos Ayres. By William H. 



Hudson, C. M. Z. S. P. Z. S. 1870, p. 112. 



95. Third Letter on the Ornithology of Buenos Ayres. By William H. 



Hudson, C. M. Z. S. P. Z. S. 1870, p. 158. 



96. Fourth Letter on the Ornithology of Buenos Ayres. By William H. 



Hudson, C. M. Z. S. P. Z S. 1870, p. 332. 



97. Fifth and Sixth Letters on the Ornithology of Buenos Ayres. By Wil- 



liam H. Hudson, C. M. Z. S. P. Z. S. 1870, p. 545. 



98. Seventh Letter on the Ornithology of Buenos Ayres. By William H. 



Hudson, C. M. Z. S. P. Z. S. 1870, p. 671. 



99. Eighth Letter on the Ornithology of Buenos Ayres. By William H. 



Hudson, C. M. Z. S. P. Z. S. 1870, p. 748. 



100. Ninth Letter on the Ornithology of Buenos Ayres. By William H. 



Hudson, C. M. Z. S. P. Z. S. 1870, p. 798. 



101. The Zoology of the Voyage of H. M. S. „Beagle", under the Command 



of Captain Fitzroy, R. N., during the years 1832 to 1836. Published 

 with the approval of the Lords Commissioners of Her Majesty's Treas- 

 ury. Edited and superintended by Charles Darwin, Esq., M. A., 

 F.R. S., &c. 4to, London, 1840—43. 



102. On the Birds of the Rio Negro of Patagonia. By W. H. Hudson, 



C. M. Z. S. With Notes by P. L. Sclater, M. A., Ph. D., &c. P. Z. S. 

 1872, p. 534. 



103. Notes on the Reptiles, Amphibia, Fishes, Mollusca, and Crustacea ob- 



tained during the Voyage of H. M. S. „Nassau'', in the years 1866 — 69. 

 By Robert 0. Cunningham, M. D., F. L. S., «&C. Trans. Linn. Soc. 

 vol. xxii. p. 465. 



104. List of Birds collected, during the Survey of the Straits of Magellan, 



by Dr. Cunningham. By P. L. Sclater, M. A., Ph. D., and Osbert 

 Salvin, M. A. &c. Ibis, 1808, p. 183; 1868, p. 283; 1870, p. 499. 



105. List of Birds from the Falkland Islands, with descriptions of the Eggs 



of some of the Species from specimens collected principally by Cap- 



