ImsIi of the Tale Sa]). 
4')/ 
prominent when a specimen is allowed to dr}- up a little. The dorsal, the caudal 
and the greater part of the anal are deep black, while the paired fins are not i)articu- 
larl)'- marked. 
Measurements in millimetres.. 
Total length without caudal 
• • 230-9 
165-0 
Length of head . . 
• . 305 
223 
Height of head near occiput 
. . 170 
I3'2 
Breadth of head . . 
14-6 
H'O 
Height of body . . 
17-0 
12-8 
Trypauchen vagina (Bl. Schn.). 
187(1. 'I'l'vpaitclnni vaoiini. Day, Fish. India I, p. 320, Ixviii. fi^. 2. 
There are three specimens of this species in the collection. They were obtained 
by Ur. Annandale at vSinggora. The largest is about 126 mm. in length without the 
caudal. 
Trypauchen vagina is found along the coasts and in the lagoons and estuaries of 
India, the Tndo- .\ustralian Archipelago and China. 
Trypauchenichthys typus Blkr. 
i8()i). 1' rx'pauchcMnhthxs lypus, Bleeker, Act. Soc. Sc. Indo-Neerl. VIII, ]>. 63. 
i8()i. Trypauchenichthys typiis. Giiuther. Cat. Brit. Mns. Fish. Ill, p. 138. 
1874. Trypauchenichthys tvpits, Bleeker, Arch. Neer. Sc. Nat. IX, p. 331. 
This species is represented by two specimens in Dr. Annandale' s collection from 
the Tale Sap. Both of them were obtained at Singgora and are 168 and 162 mm. in 
length without the caudal respectively. The species, so far as I know, has only been 
known from " Sungi-duri " in Borneo and its occurrence in the Siamese waters is 
recorded here for the first time. 
In my specimens the length of the head is contained about 6 6 times and the 
depth of the body 9.4 times in the total length without the caudal. The doi sal com- 
mences above the last portion of the pectoral and contains 6 spines and 56 branched 
rays ; the anal contains i spine and 49 to 50 branched rays. Both the paired fins 
are quite small and the caudal appear.s to be pointed in the middle. The scales are 
cycloid and somewhat deciduous ; there are about 55 to 58 series of scales along the 
lateral line, which is not represented by perforated scales. vSmall, rudimentary scales 
are present on the dorsal surface and sides of the head and on the cheeks and on the 
chin, but are totally absent from the region of the operculum and a portion of the 
dorsal surface of the body immediately behind the head. The eyes are very small 
and are represented by two pits only. The mouth is small and oblique and is turned 
upwards, the lower jaw projecting beyond the upper. There are several rows of 
small teeth on each jaw, those of the outer row are much larger and possess truncate 
or bluntly pointed apices which are in most cases coloured dark brown. 
In habit and general facies the members of this genus are similar to those of the 
genus Trypauchen from which they can readily be distinguished by the possession 
