VI 



We are glad of the opportunity to thank Dr. J. C. KONINGS- 

 BERGER, Director of s Lands Plantentuin at Buitenzorg, Java, for 

 the great advantage of his collaboration and interest in our 

 work. He allowed us to study all the Cyprinoidea, Apodes and 

 Synbranchi belonging to the Zoological Museum at Buitenzorg 

 and to the " Visscherijstation" at Batavia. Our thanks are 

 therefore also due to Major P. A.OUWENS, keeper of that Museum 

 and to Dr. A. L. J. SUNIER, head of the Station for Fishery 

 Investigation at Batavia, who was kind enough to forward the 

 collection to us and gave us valuable information about its 

 content. 



Greatfully we acknowledge the great help we had, in prepa- 

 ring this volume, from the ichthyological material of the Rijks 

 Museum at Leiden. Through the kindness of its Director Dr. E. 

 D. VAN OORT its riches were always at our disposal and by 

 the untiring help of Miss Dr. C. POPTA, we could make use 

 of the types described by herself, by VAILLANT and of some 

 of the types and cotypes of BLEEKER and KAUP. 



The bulk of BLEEKER's types of Cyprinoidea and Apodes is 

 contained in the British Museum (Natural History). One of 

 us had the opportunity to study them: an opportunity without 

 which our work had been insufficient and incomplete. We are 

 therefore glad to thank the Director of the Zoological Depart- 

 ment of that Museum, Dr. SYDNEY HARMER and especially 

 Mr. C. TATE REGAN, under whose able superintendance the 

 fish collection is placed, for the valuable and liberal help we 

 always received. 



Dr. G. DUNCKER from the Hamburg Museum was kind 

 enough to send us for inspection all the Cyprinoidea from the 

 Archipelago, which are under his charge. This important col- 

 lection was of much help in our study. 



We have also to thank Dr. J. PELLEGRIN for very valuable 

 informations about some types preserved in the Museum 

 d'histoire naturelle at Paris and Dr. R. GESTRO, Director of 

 the Museo Civico of Geneva, for some cotypes of species 

 described by PERUGIA. 



For the benefit of those who make use of this volume we 

 repeat the technical informations, given in the introduction 

 to the second volume of this series. 



In describing the fishes we understand by Length, in the 



