INTRODUCTION?. 



The Fishes included in this Catalogue were all of them dredged by the 

 R. I. M. S. " Investigator," in deep water, between the meridians of 65° and 99° 

 B. and the parallels of 5' and 24° N., during the years 1885-1899, 



They number, exclusive of a few mangled remains that cannot be identified 

 with certainty, 169 species, namely : — 



Chondropterygii 

 Acanthopterygii 

 Anacanthini 



Fhysostomi 

 PledognatM 



Of these — 126 species have, so far as is known, been taken only by the 

 " Investigator ; " while 43 species are believed to be identical with species found 

 in other parts of the world, the identities having been assured by actual com- 

 parison of specimens in 13 instances. 



It wiU be interesting, to begin with, to inquire into the geographical distri- 

 bution of these 43 species and to see if they throw any light on the outside 

 relations of the Fish-fauna of the Indian seas. 



It appears that the following 23 of them, or over thirteen per cent, of the 

 whole, are common to these seas and the Atlantic, and many of them to certain 

 very definite areas of that Ocean : — 



Setarches Giintheri Johns. 



* Hoplostethus mediterraneum C. V. (Also in the Mediterranean). 

 TrachicJithys Darwinii Jolius. 



Polymixia nobilis Lowe. 



* Antigonia capros Lowe. 

 Bembrops caudimacula Stdr. 



( = *nypsicomeles gobioides G. & B. ). 

 Chiasmodus niger Johns. 

 Ghaunax pictus Lowe. 



* Dicrolene intronigra G. & B. 

 Diplacanthopoma brachysoma Gthr. 



* Macrurus cavernosus G. & B. 

 (probably identical with the Mediterranean Eymenocephalus ifalictis Giglioli), 



Macrurus Lvvis Lowe. (Also in the Mediterranean). 

 Bathygadus longifilis G. & B. 



* Argyropelecus hemigymnus Cocco. (Also in the Mediterranean). 



{ 



Species marked with an asterisl£ have been compared with actual specimens from other localities. 



