1923.] 



Fauna of the Chilka Lake : Fish. 



741 



fication has been made> to include the peculiar structure of the mouth, which is very wide 

 and of the gill-openings, which extend further forwards than in Gobius, rendering the isthmus 

 narrow. AH these characters are well-marked in the four old species, G. platycephalus 

 (Richardson), G. giuris (Ham. Buch.), G. biocellatus (Cuv. and Val.) and G. brunneus (Schlegel)» 

 that have been included in this genus. Of the species that have been recently described, 

 the tongue of G. campbellianus (Jordan and Snyder) 1 is stated to be " notched " and the 

 " lower jaw slightly projecting." This species has been referred to Glossogobius because it 

 possesses " the large mouth, notched tongue and narrow isthmus." It is open to question 

 whether a species which does not possess " protruding lower jaw, an anteriorly free and 

 deeply emarginate tongue " can be included in Glossogobius. The remaining species, G. 

 aglestes (Jordan and Seale), 2 G. abacopus (Jordan and Richardson) 3 and G. mas. sp. nov. 

 show typical Glossogobius characters. 



Glossogobius giuris (Ham. Buch.). 

 1919. Glossogobius giuris, McCulloch & Ogilby, Rec. Austr. Mus., XII, p. 236. 



This is one of the most widely distributed species of the genus and is represented by a 

 large number of individuals from different localities in the Chilka Lake. The outline of 

 the tongue is liable to considerable variation. In some individuals a large parasitic Isopod 

 was found inside the mouth cavity and in such examples the tongue was found to be abnormal 

 in that it was swollen and the emargination was feebly indicated. 



The following statement shows the different localities whence the specimens were 

 collected and their number : — 



5 specimens ... 



... Satpara 





... 



10 November 1914. 



3 „ 



Chilka Lake, Orissa 







31 July 1913. 



2 „ 



... Barkul . 





... 



10 September 1914. 



4 „ 



. . . Satpara 





... 



March 1914. 



4 „ 



... Rambha Bay 





... 



February 1914. 



1 specimen 



... Main channel W. of 

 Island 



Satpara 



16 March 1914. 



2 specimens ... 



... W. of Satpara 





... 



20 March 1914. 



1 specimen 



... Channel between Satpara 

 Barnikuda. 



and 



4 September 1914. 



1 „ 



... About 1 mile of£ 

 Nalbano Island 



N.E. 



of 



25 November 1914. 



Distribution. — The range of this species extends from the East Coast of Africa, through 

 the seas and fresh waters of India to Malay Archipelago, Australia and beyond. 



Glossogobius biocellatus (Cuv. and Val.). 

 1919. Glossogobius biocellatus, McCulloch & Ogilby, Rec. Austr. Mus., XII, p. 237. 



There are three specimens in the collection. All of these were collected in the neigh- 

 bourhood of Barnikuda in early September, 1914. This species occurs near the coasts of 

 India and the range extends to the Malay Archipelago and Australia. 



1 Jordan and Snyder, Proc. U. S. Nat. Mus. XXXIII, p. 542, fig. 2 (1908). 



2 Jordan and Seale, Proc. U. S. Nat. Mus. XXVIII, p. 799, fig. 16 (1903). 



3 Jordan and Richardson, Mem. Carnegie Mus. IV, p. 200, pi. lxxiv (1909). 



