I2Q CATALOGUE OF FISH. 



to the ludiau tish, with some rectification of tliat naturalist's 

 generic character. 



As high as the tide flows in the Ganges, so far does this eel go 

 in great numbers, as well in the dry season as during the rains. It 

 is numerous in the Hooghly, and brought daily in quantities to the 

 fish-bazaars of Calcutta. It remains alive 24 hours, when taken 

 out of the water ; but when placed in fresh water it falls speedily 

 to the bottom. 



A Malabar specimen measured '2'S-i) in., of which the tail formed 

 G-3 in. 



Genus 49. SYNBRANCHUS, Block. 



Combines all the characters of Ophisternon, with the want of a 

 partition between the gill-openings of the four-fringed gills. The 

 gill opening does not take the angular form that it does in Mono- 

 pteriis, Opliisternon, and Amphipnous. Hinder nostrils situated 

 above the eyes, and capable of being closed by a cutaneous lappet. 



211. Synbranchus marmoratus. 

 Synbrauchus marmoratus, Block, t. 418; Sijst. 524. 



Dorsal commencing before the vent, and the anal behind the vent, 

 but at times not distinctly developed till near the end of the tail. 

 In a very large individual there is the merest trace of an anal fin, 

 and that only near the end of the tail. Colour dark greenish-brown 

 above, yellowish on the under parts ; the whole body, the head 

 excepted, being marked by irregular and round spots of various 

 sizes. 



Total length, 27-57 in. Length of tail, 2-84 in. 



A smaller specimen measured 23 22 in. Tail, 637 in. 



212. Synbranchus immaculatus. 



Synbranchus immaculatus. Block, Ausl. Fische, t. 410, fig. 1 (e.v 

 cute kab. Tranqneharia) ; Shaw, Gen. Zool. [a copy), iv. 3(5. 



Resembles, in all respects, niurviornlns ; but the fins are both on 

 the dorsal and ventral sides of the tail distinctly formed from the 

 anus to the point of the tail. I am acquainted with only a shri- 

 velled specimen in spirits, which has an uniform yellowish-brown 

 colour. 



Length, 13-59 in. Length of tail, 375 in. 

 Cayenne. 



Ge.nus 50. MONOPTERUS, Lacepede. 



Only three branchiaj. No lung-like sacs under the skin of the 

 occiput. No nasal bone. Palatine bones meeting in an angle in 



