VIII 



so many valuable objects; not only that Dr. BoULENGER was 

 so kind as to allow me to examine each snake in the British 

 Museum I wanted to see, but he also gave me his advice on 

 dififerent matters. Specimens for examination were obtained 

 from Prof. WiREN in Upsala, Dr. Annandale in Calcutta 

 and Dr. Roux at Basle, so that descriptions and figures could 

 more easily be made. 



Prof. ToRNiER of the Berlin Museum and Prof. LOHMAN 

 in Hamburg did not think it safe to send specimens but gave 

 information of the doubtful points; the latter sent a figure 

 made by Dr. DUNCKER to clear up my question, for which I 

 am very grateful. Professor JACOBI of the Dresden Museum 

 informed me about a specimen of Python belonging to that 

 Museum. 



P"or this volume too Mr. Obbes was willing to draw all 

 the figures, in which he succeeded admirably. To the end 

 Prof. Max Weber showed his interest in the work by sug- 

 gesting emendations, which I thankfully applied. 



Amsterdam, November 19 17. 



Nelly de Rooij. 



