558 MR. P, DAT ON THE GEOGRAPHICAL 



Grenus Amphipnous. 

 1, A. cuchia\ Ram. Buch. Punjab, throughout Bengal and 

 Orissa, through Assam to Burma. 



Genus Monopterus. 



1. M. JAVANENSis", Lacep. Burma, Malay archipelago, and 

 China. 



Grenus Stmbranchus. 



1. S. BEMGALENsis^, MClelland. India to the Malay archi- 

 pelago, and the Philippines. 



The foregoing freshwater fishes alluded to as existing in India 

 and Burma belong to sixteen families'*, which are distributed as 

 follows : — 



Scisenidse, Grobiidse, Ehyuchobdellidse, Mugilidse, Siluridse, 

 Scombresocidae, Cyprinodontidse, Cyprinidse, Mursenidse, all of 

 which have representatives in the Palaearctic, African, and Oriental 

 regions. Percidse group Apogonina, Labyrinthici, Notopteridse, 

 which belong to the African and Oriental regions. Nandidae 

 group Nandina, Ophiocephalidse", Symbranchidae, and Chromides, 

 all of which are restricted to the Oriental region except the last, 

 which has a representative in Madagascar. 



By giving every genus and species and adding their synonyms 

 in the form of notes, all question as to what are included in these 

 papers must be set at rest. Some authors may consider that I 



^ Includes: — Ophichthys pimctatui^, Swainson ; Pneicmahranchus strlatics, le- 

 2>rosus, and albinus, M'Clelland. 



2 Includes : — Unibranchapertura Icevis, Lacep. ; Symbranchus euryehasma, 

 Eleeker ; Ophicardia Phayriana, M'Clelland ; Symbranchus grammicus. 

 Cantor ; Monopterus cinereiis, xmithognathus, marmoratus, and helvolus, Rich- 

 ardson ; Apterigia saccogularis, nigromaculcita, and immacidata, Basilewski. 



^ Includes : — Symbranchus immaculatits. Cantor ; Tetrabranchus microph- 

 thalmus, Bleeker. 



* Mr. W. T. Blanford, in his excellent paper on "The African Element in 

 the Fauna of India," in the 'Ann. & Mag. of Nat. Hist.' Oct. 1876, observes of 

 the zoological productions of India : — " I have long been convinced that many of 

 the usual generic groups are artificial ; and some are even founded upon geogra- 

 phical distribution — forms which inhabit Africa being placed in a different genus 

 from those which inhabit India on account of a difference in the locality, and 

 not of a difference in structure." However well such a remark may apply to the 

 other branches of zoology, I do not think it is correct as regards ichthyology. 



^ I have obtained Ophiocephalus gachua from Beloochistan ; it has likewise 

 been taken in Afghanistan, or localities within the Pal«arctic region. 



