6 
Memoirs of the Indian Museum. 
[Voi,. II, 
2 cf 
Breadth of pectoral fin 
• • 39-9 
cm. 
• . 
,, ,, pelvic fin .. 
35-0 
y y 
• . 
Length of pectoral fin . . 
32-5 
y y 
• . 
,, ,, pelvic fin . . 
23-0 
y y 
. . 
Breadth of first dorsal fin 
• • 35-5 
y y 
, , , , second dorsal fin 
34-0 
y y 
• • 
Height of first dorsal fin 
35-0 
y y 
27*5 cm. 
, , , , second dorsal fin 
25-0 
y y 
26-25 „ 
Length of dorsal lobe of caudal fin 
40-5 
y y 
35-0 ,, 
Greatest breadth of dorsal lobe of caudal fin . . 
27-0 
y y 
The rostral teeth are narrow in these specimens. 
measuring 10 
mm. in breadth 
the base and 21 mm. in length where they are not 
worn. They 
are 
very slightly 
retro verted and show no signs of a barb on the posterior edge, as the rostral teeth of all 
young examples of the species ( =P. semisagittatus , Shaw) do (see Müller and Henle, 
Syst. Beschr. d. Plagiostomen , pi. 6o, 1841). The male has 27 teeth on either side of the 
saw ; the female 27 on the right and 28 on the lert. 
The colour of young individuals is a dark leaden grey on the dorsal surface, fading 
to pale grey on the belly. The back of old specimens is considerably paler than that 
of the young and is tinged with green in life. 
Pristis cuspidatus is confined to the seas of India and the Malay Archipelago. It 
is common at the mouths of the Ganges. 
There is an interesting abnormal (stuffed) specimen of this species in the Museum. 
The anterior dorsal is entirely absent, but a slight scar on the skin of the back would 
suggest that it had been removed accidentally. In front of this scar there is a longi- 
tudinal band of small, broadly heart-shaped, flattened denticles, which is broadest 
posteriorly and becomes gradually narrower in front, reaching slightly beyond the 
anterior margin of the pelvic fins. The specimen is a young one, measuring about 80 
cm. in length and was purchased in the Akyab market in 1906. 
Pristis perottetii, Müller and Henle. 
This species is distinguished from P. pectinatus and P. zysron by the small number 
of its rostral teeth (not more than 22 pairs) and by the position of its first or anterior 
dorsal fin, which originates considerably further forward on the body than the pelvic fins. 
This species is very common in the estuaries of the Ganges and Brahmaputra, 
which it ascends for at least a hundred miles, often being captured in fresh water. 
The following are the measurements of two large females taken by the “ Golden 
Crown,” A in November off Arakan and B in October off Orissa. 
A. B. 
Extreme length (including saw) . . . . . . 656'0 cm. 561 ‘O cm. 
Eength of saw . . . . . . . . i45'0 130-0 ,, 
■ Breadth of saw (at base) .. .. .. 27-0 ,, 22-7 ,, 
