I'isli of the T'de Sap. 
465 
It agrees fairly closely with Aiinandale's description of the species, but differs 
in having a very narrow margin of dark brown colour on the ventral surface which 
in some places is not quite distinct. 
Trygon bleekeri has so far been obtained off the coasts of Orissa, Bengal, 
and Burma and its occurrence in Siani is recorded here for the first time. 
Hypolophus sephen (ForskSl). 
iqog. Hypolophus sephen, .\niiandale, op. cit., p. 33. 
This species is represented by one complete specimen and one jaw in the 
collection. They were obtained near Singgora in the outer lake. Dr. Annandale 
tells me that this species also makes its way in the inner part of the lake. 
Hypolophus sephen is extensively found in the seas of India and the Malay 
Archipelago and also occurs in the river Cranges up to about 600 miles from the 
mouth. 
Family MYIJOBATIDAE. 
Aetobatis narinari (Euphrasen). 
1910. Aetobatis narinai'i. Annandale. op. cit.. Ill, p. 4, pi. ii, fig. 2. 
There is a skin in spirit of this .species in the collection. It was obtained 
at Singgora in the outer lake. The specimen is conspicuously spotted on the 
dorsal surface. Most of the spots are situated on the body and there are very 
few on the head. As a matter of fact there are only three spots in front of 
the posterior margin of the spiracle. As regards colouration this .specimen is 
intermediate between the colour varities A and B recognised by Annandale. 
This .species occurs in Red Sea, seas of India and the Malay Archipelago. 
Its range extends to the Atlantic and the South Pacific oceans. 
Family RHINOPTERIDAE. 
Rhinoptera javanica Miill. and Henle. 
1913. Rhinoptera javanica, Gorman, op. cit., p. 446. 
In Dr. Annandale's collection from the Tale Sap, this species is represented 
b}' a head in spirit. It was obtained at Singgora. 
Rhinoptera iavamca is found in the seas of India and the Malay Archipelago. 
SYNBRANCHOIDEA. 
Family SYNBRANCHIDAE. 
Monopterus albus (Zuiew). 
1916. Monopterus albus, Weber and Beaufort, Fish. Indo- Austral. Archipel. Ill, p. 413, 
figs. 210 and 211. 
This common and widely distributed species of the Far East is represented 
by three specimens in Dr. Annandale's collection from the Tale Sap. All the 
specimens were obtained at the m.outh of the Patelung river. 
The colour varies greatly in the three specimens before me. In the largest 
specimen the back is uniformly dark-grey while the under surface is pale white. 
