150 ZOOLOGICAL RRSEARCHES 



tries and most likely future investigations may prove that 

 they also inhabit the intermediate regions. 



In the following lists will be mentioned only the spe- 

 cimens belonging to the collections of the Leyden Museum , 

 the rest being sent to Mr. Schliiter, the well-known Ger- 

 man dealer in objects of natural history at Halle , exclu- 

 sively charged with the distribution of our duplicates. The 

 same will be the case with the duplicates , expected in 

 from Mr. Stampfli. 



In my list of birds I have , with a few exceptions , fol- 

 lowed the classification accepted by Dr. Hartlaub in his 

 Ornithologie West Africa's. As I had interleaved and com- 

 pleted it, before my departure, with recent publications 

 and annotations concerning the Ornithology of Western 

 Africa , this most valuable book has rendered me excee- 

 dingly good services duriug and since my stay in Li- 

 beria. 



I cannot close this introduction without mentioning Mr. 

 Schweitzer , who was sent to Liberia by Dr. Dohrn at Stet- 

 tin, especially for collecting molluscs and insects. He staid 

 in Liberia from 1875 to 1877, and explored the country 

 north-east from Monrovia , especially along the Messu- 

 rado- and the Junk River. Besides an important number 

 of partially new molluscs and insects , the latter published 

 in the »Stettiner entomologische Zeitung" (1875 to 1878), 

 he sent over mammals and birds. Amongst the mammals 

 were very rare ones, as Colobus polycomus^ Antilope syl- 

 vicultrix and Hippopotamus liberiensis , all tbree acquired 

 by the zoolog. Museum at Berlin. As to the birds I do 

 not know whether a complete list has been published some- 

 where or not. Two new species [Laniarius melamprosopus 

 and Turdirostris rufescens) are described by Dr. Reiche- 

 now in the Journ. f. Ornith. 1878, p. 207. Agapornis 

 swinderniana is, as Dr. Hartlaub writes in the Ibis, 1879, 

 p. 84, rediscovered by Mr. Schweitzer in Liberia, who 

 collected ten specimens of this long years in vain sought 

 for species. 



Notes from tbe Leyden ^luseum, "Vol. VII. 



