10 BARBOUR: ZOOGEOGRAPHY. 



under the deepest obligation for a multitude of favors. Nor can I forget many 

 other friends: — Mr. G. A. Sedee of Ternate, and Mr. Duivenboden, of Ake- 

 Selaka, Halmahera, whose grandfather's schooner carried Wallace, the first 

 naturalist to live in New Guinea. Then to many officials of the Koninklijke 

 Paketvaart Maatschappij, whose constant help was invaluable, I here express 

 my appreciation. 



In preparing his report, I have been much aided by Dr. Leonhard Stejne- 

 ger, Dr. G. A. Boulenger, Mr. Samuel Garman, and especially by Prof. E. L. 

 Mark; though it is only fair to say that they should in no wise be held re- 

 sponsible for any opinions which are expressed herein. It is a pleasure to 

 thank them for patient assistance. 



Since writing the previous pages I have received for study a very extensive 

 addition to my Javan material. My friend, Mr. Owen Bryant, in company 

 with Mr. William Palmer, of the United States National Museum, spent 

 somewhat more than a year in western Java, accumulating a large quantity of 

 reptiles and amphibians. These I have been privileged to study, and to retain 

 a series of desired species where duplicates exist, thanks to the kindness of the 

 collector and to the authorities of the United States National Museum. Mr. 

 Bryant's material has made it possible to examine very large numbers of in- 

 dividuals from the same localities, since he spent much time in several of the 

 same places where I collected. I do not believe that it has ever been possible 

 previously to examine so large an amount of Javanese material from a limited 

 region, and with such full data. It is, however, unfortunate that the late 

 receipt of the collection has not made it possible for me to examine it quite as 

 critically as I should have wished to. Nevertheless, I have the data taken from 

 the scale-counts of each snake; and these, with the notes I already had, make 

 it possible to point out, probably with considerable certainty, the exact local 

 average shown by many of the species, and in many cases to indicate the 

 strong probability, or even certainty, of the occurrence in Java of geographic 

 races of some of the continental species. 



It is a pleasure to thank Mr. Bryant for making this collection, and also 

 Mr. Ward Shepard for assistance in making notes for me concerning it; and 

 especially, besides, to acknowledge the painstaking care which Mr. E. N. Fischer 

 has expended upon the plates. 



Fortunately it has been possible to obtain from the collections of Mr. A. E. 

 Pratt and others some small series of examples which have been of the highest 

 interest. These are in most cases mentioned passim. 



