VI 



same interest. We are under particular obligations to him and 

 to Dr. A. L. J. SUNIER, Head of the Government Laboratory 

 for Marine Investigation at Batavia and to Dr. K. W. Dam- 

 MERMAN, Director of the Zoological Museum at Buitenzorg, 

 for sending us for study the fishes in the institutions under 

 their control. 



We are also indebted to Mr. B. A. Bean (Washington), 

 A. R. Mc CULLOCH .(Sydney), Dr. G. Duncker (Hamburg), 

 H. W. Fowler (Philadelphia), Dr. J. Pellegrin (Paris), Dr. 

 F. Sarasin and Dr. J. Roux (Basel) for valuable informations 

 concerning species in the collections under their charge. 



Again we have to thank Prof. Dr. E. D. van Oort and 

 Miss Dr. C. Popta for giving us every facility to study the 

 fishes in the Leiden Museum, especially the specimens of 

 Bleeker's collection. 



We beg to express our hearty thanks to Mr. C. Tate Regan 

 for his kind help in studying some fishes in the British Museum 

 during the preparation of this volume. Also to Dr. V. PlETSCH- 

 MANN when comparing some types in the Vienna Museum. 



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

 repeat the technical informations, given in the Introduction to 

 the former volumes of this series. 



"In describing the fishes we understand by Length, in the 

 discussions of the proportions, the distance between the snout 

 and the base of the caudal fin; in giving the largest size 

 known for a species, we include the caudal fin. 



The Head is measured from the tip of the snout to the end 

 of the opercle, its proportion to the length is indicated e.g. 

 as follows: head 4 — 470 means, that the length of the head 

 is contained 4 to 4'/^ times in the length. 



Height is the maximum height; in special cases it is indi- 

 cated how it is measured; the figures placed behind "height" 

 indicate how many times it is contained in the length. 



The size of the Eye, the length of the Snout, of the Jaws 

 etc. are compared with the length of the head; thus "eye 4" 

 means, that its diameter is '/^ of the length of the head. 



In counting the Scales, under "■L.l.'" is given the number 

 of scales, with or without sensory organs, between the head 



