HI ST OR y OF DISCO VER Y AND EXPL ORA TI ON 11 
the impression made on him by the aspect of Nature in 
Madagascar. Sonnerat first made us acquainted with the 
wonderful aye-aye (CJieNomys). About the middle of this 
century followed Sganzin (1840), Bernier and Goudot, 
and later J. Vinson, Lantz, Pollen, Hildebrandt, Rutenberg 
and Keller. At a more recent period Catat and Maistre 
obtained abundant additions to our knowledge in regard 
to Natural History, and G. Muller entered upon the in¬ 
vestigation of the extinct P'auna. Unfortunately, however, 
he was murdered in the northern part of the island, 
after a most promising commencement of his labours of 
exploration. Dr. A. Voltzkow, the German traveller, 
was more fortunate. He has recently visited different 
regions of Madagascar and is now publishing his dis¬ 
coveries in the Proceedings of the Senkenberg Natural 
History Society. 
