114 MAMMALS ÜF THE 



All the zoological collections made by Dr, Nieuwenhuis 

 like those formerly made by Dr. Büttikofer have very gene- 

 rously been presented to the Leyden Museum by the Society 

 for the advancement of Natural History exploration in the 

 Dutch Colonies — Maatschappy ter bevordering van bet 

 natuurkundig onderzoek der Nederlandsche koloniën — 

 and our sincere thanks are due to the Directors of the 

 named Society. 



The mentioned collections will successively be described 

 in the » Notes from the Leyden Museum". 



I described the Mammals collected by Dr. Büttikofer in 

 the Notes from the Leyden Museum, 1897, pp. 26 — 66. 



PRIMATES. 

 Hylebates. 



It is a well-known fact that the Genus-name Hylohates 

 has been invented by Illiger; we find in his »Prodromus 

 systematicus Mammalium et Avium, 1811, p. 67: Genus 3. 

 Hylohates {v\o(3xTyjt;^ per sylvas gradiens) (Armaffe), with the 

 species Simia lar Lin. Gmel. ; the introduction s. n. » Lectori" 

 he wrote in April 1811, see p. XVIII: »scribebam Bero- 

 lini in Museo zoologico m. Aprili 1811". Now all natu- 

 ralists have overlooked that somewhat more than one month 

 earlier Illiger held a lecture before the members of the 

 »königliche Akademie der Wissenschaften" in Berlin, en- 

 titled: »Ueberblick der Saugethiere nach ihrer Vertheilung 

 über die Welttheile" (Vorgelesen den 28. Februar 1811). 

 On p. 91 he verbatim said: »Von dieser Gattung der 

 raenschahnlicheu Affen trenne ich unter den Namen Hylebates 

 die langarmigen Affen , den Lar, BuSon's Grand Gibbon , 

 den damit bisher verbundeuen Fetit Gibbon , varius , und 

 den Audebertischen Moloch , den Schreber Leucisca nennt". 

 Here he therefore for the first time separated the Gibbons 

 under a new generic title , viz. : Hylebates , and a few weeks 

 later he changed that title in the later-on everywhere 

 used name Hylobates. And that Illiger did not wrote Hyle- 



IVotes from the Leyden jMuseum, "Vol. X.'X.. 



