474 
Z()()L()(;V OF THK I'AK HAvST, 
of dorsal fin rays and in colouration. M. annandalei can be inserted just above 
M. boaja in Weber and Beaufort's key to the Indo- Australian species of the 
genus Microphis. 
Measurements. 
Total length including caudal . . . . 102 5 mm. 
Length of head .. .. .. 17-3 
Length of snout . . . . . . lo-o 
Doryichthys deokhatoides (Blkr ). 
1922. Doryichthys deokhatoides,'^ eber and Beaufort. Fish. Indo-Aiistralini Archipel. lY . p. 53. 
There is a single specimen of this species in the collection. It was obtained 
by Dr. Annandale in small pools and ditches near the edge of the lake at Lampam. 
Doryichthys deokhatoides is found in the rivers and brooks of Sumatra, Borneo 
and tlie Malay Peninsula. 
OPISTHOMI 
Family MAvSTACEMBELIDAE. 
Mastaccmbelus armatus (Lacep.) var. favus, var. nov. 
Dr. Annandale obtained two specimens from the mouth of Patelung river 
which I refer to this new colour variety of the widely distributed Oriental species 
of the genus. I have examined three more specimens of this variety from 
Bangkok which were found in a big collection of fish submitted to us by 
Dr. Malcolm Smith for identification and description. I find the colour pattern in 
ah these specimens quite constant and very characteristic The whole of the 
Text-fig. 2.— Lateral view of Mastacembelns armatus var. favus. \ ar. nov. (much reduced, 
spines dissected out). 
body is marked with a bold reticulation of dark brown or black bars, which enclose 
large oval or rounded pale spots. The upper part of the head and of the sides of the 
snout is dark and the whole of the lower part of the head pale with dark markings. 
In some specimens the reticulation extends all over the abdominal surface m the 
form of narrow lines, but in some it is obsolete. The vertical fins are dark. The 
pectoral fin is pale with a dark mark at the base of the rays. 
Of the specimens of M astacembelus armatus from all over India examined by me, 
there is none having the above described colour pattern. 
