1909.] 
N, Annandale : Report on the Batoidei. 
57 
Adults are seldom caught even in the trawl and may be solitary. I have only seen one 
large specimen, which was taken off the Orissa coast. Its measurements are given 
below. 
Aetobatis flagellum (Bloch and Schneider). (PI. iv, fig. 5.) 
A. flagellum, Müller and Henle, Syst. Beschr. d. Plag., p. 180. 
The differences between this species and the preceding one are noted in the table 
showing the specific characters of the three species of the genus. I have not been able 
to discover any other points that call for notice. Perhaps the tail is longer in propor- 
tion to the body ; but in most large specimens of Myliobatidæ the tail is mutilated. 
Müller and Henle’s description is accurate, as is always the case in the work of 
these authors, whose monograph, in .spite of the fact that it contains a certain number 
of specific descriptions that refer actually to the young stages of forms described as 
distinct, is still by far the most reliable guide as regards the identification of the 
Oriental Batoidei. 
A . flagellum is apparently rare in the northern part of the Bay of Bengal. I have 
only seen two examples, a male taken by the “ Golden Crown ” off the Orissa coast 
in November, and a severed head brought from the mouth of the Chilka Lake on 
the same coast in December by Dr. Jenkins. 
Measurements of Indian species of Myliobatis and Aetobatis. 
Species. 
Sex. 
Across 
disk. 
Mouth to 
vent. 
Nasal flap. 
Breadth 
of snout 
at base. 
Length of 
snout. 
Tail. 
Myliobatis nieuhofii . . 
9 
470 mm. 
190 mm. 
36 X 21 mm. 
51 mm. 
^ 23 mm. 
Broken. 
> J 5 5 
â 
354 .. 
145 ,, 
30x17 ,, 
37 
25 ,, 
563 mm. 
5 5 5 5 
9 
600 ,, 
245 ,, 
45x25 ,, 
55 ,, 
40 ,, 
Broken. 
5 5 5 ’ 
9 
540 ,, 
220 ,, 
40x20 ,, 
50 ,, 
32 ,, 
5 5 
5 » 5 5 • • 
rf 
360 ,, 
140 -> 
26x17 ,, 
42 ,, 
25 ,, 
505 nim. 
5 5 5 5 
9 
510 ,, 
205 ,, 
35x19 ,, 
50 ,, 
35 
Broken. 
55 5 5 
9 
340 ,, 
133 >> 
30x15 ,, 
42 ,, 
25 
5 5 
5 5 5 5 
c? 
640 ,, 
260 ,, 
45x23 ,, 
56 „ 
40 ,, 
555 mm. 
M . nieuhofii var. corni - 
fera . 
r? 
420 ,, 
165 >. 
35x20 ,, 
45 ,, 
26 ,, 
560 ,, 
5 5 5 5 5 5 5 5 * • 
f? 
445 
H 
o^ 
00 
35x20 ,, 
45 ,, 
27 ,, 
620 ,, 
5 5 5 5 5 5 5 5 • • 
r?' 
390 ,, 
135 
25 X 20 , , 
40 ,, 
21 ,, 
685 „ 
55 55 55 55 • • 
rT 
416 ,, 
153 .. 
32x17 ,, 
42 >, 
20 ,, 
Oio ,, 
5 5 5 5 5 5 5 5 • • 
â 
441 
170 .. 
36x21 ,, 
47 >. 
30 ,, 
840 ,, 
