68-5 



mm. 



13-0 



55 



17-0 



55 



27-7 



55 



8-6 



55 



5-9 



j; 



5-8 



55 



3-3 



55 



8-8 



55 



6-5 



55 



86 





55 





15 





5 





1923.] Fauna of the ChilJca Lake : Fish. 759 



The following are the measurements and the number of fin-rays in the manuscript draw- 

 ing of Hamilton Buchanan's P. arsius, now preserved in the library of the Asiatic Society 

 of Bengal : — 



Total length, including length of caudal fin 



Length of caudal fin 



Length of head ... 



Greatest depth of body 



Length of pectoral fin of left side 



Length of pectoral fin of right side 



Length of ventral fin 



Longest diameter of upper eye 



Longest ray of dorsal 



Longest ray of anal 



No. of rays in dorsal ... ... ... ... • ... 



No. of rays in anal 



No. of rays in caudal 



No. of rays in ventral 



Pseudorhombus arsius extends from the east coast of Africa, through the seas and estua- 

 ries of India, to Australia and China. 



Family SOLELDAE. 



Genus SYNAPTURA Cantor. 



Synaptura orientalis (Bl. & Sehn.). 

 1878. Synaptura orientalis, Day, Fish. India II, p. 429, pi. xciii, fig. 4 ; pi. xciv, fig. 2. 



In the collection from the lake there is only one specimen about 17* 6 cm. in length includ- 

 ing the caudal fin. It was collected near Parikudh. 



There are 67 rays in the dorsal fin and 51 in the anal. The number of scales along the 

 lateral line is 91. The depth of the body is contained about two and a half times and the 

 length of the head five and a half times in the total length includingthe length of the caudal 

 fin. The scales in the anterior part of the head on the blind side and also those along the 

 gill-openings on both sides have their ctenoid processes greatly produced and the body 

 surface in that region appears as if covered with soft cutaneous filaments. The scales of 

 this type have already been figured by Gilchrist 1 for his species, Synaptura ciliata. In 

 S. orientalis the processes are much longer than those figured for S. ciliata. In addition to 

 these there are tufts of black hair-like filaments coming out from between the scales on the 

 coloured side. 



S. orientalis is found in the seas of India and China. 



The following are the measurements of the Chilka Lake specimen in millimetres. 



Total length, including length of caudal ... ... ... 176-0 



Length of caudal ... ... ... ... ... 23-5 



Length of head ... ... ... ... ... ... 31-2 



Gilchrist, Mar. Invest. South Africa III, p. 14, pi. xxxiv (1905). 



