FRESH-WATER FISHES OF SIAM, OR THAILAND 445 



Genus ICHTHYOCAMPUS Kaup 



IcJithyocampus Kaxtp, Arch. Naturg., vol. 19, pt. 1, p. 231, 1853. (Type, Ichthyo- 

 campus helcheri Kaup.) 



ICHTHYOCAMPUS CARCE (Hamilton) 



Syngnathus carce Hamilton, 1822, p. 13 (Ganges). 



Ichthyocampus carce Smith, 15J33a, p. 84 (Meklong aud Bangpakong Rivers). 



There is no record of the finding of this species in Thailand prior 

 to the collections made for the Siamese Bureau of Fisheries, but as 

 the fish is Imown from Malaya as well as from Sumatra, Java, Bali, 

 Celebes, India, and Ceylon, its local occurrence is not unexpected. 

 The first specimen taken in local waters came from the Meklong on 

 June 12, 1927, and was brought in by Luang Praserth Aksorn, of the 

 Bureau. It was a male, 13.5 cm. long, with young in its pouch. 

 Other specimens examined came from the Bangpakong River on June 

 4, 1928, and June 27, 1933. Two specimens on the latter date were 

 males 10.1 and 11.2 cm. long, the larger having eggs in the pouch. 



In this genus the brood pouch is restricted to the under side of the 

 tail, and the eggs, occupying cutaneous cells in the skin, are completely 

 enclosed by lateral folds, which may contain osseous plates. 



Genus SYNGNATHUS Linnaeus 



Syngnathus Linnaeus, Systema naturae, ed. 10, p. 336, 1758. (Type, Syngnathus 

 acus Linnaeus.) 



In this genus, most of whose numerous members live in salt water, 

 there are two species that have been found in the fresh waters of 

 Thailand. The brood pouch is restricted to the anterior half of the 

 tail. The eggs, deposited in individual cutaneous cells, are completely 

 covered by folds of skin, which may contain bony plates. For the 

 release of the young the pouch splits lengthwise. The two species 

 from Thailand may be distinguished as follows : 



la. Snout definitely longer than postorbital part of head; eye 6 to 7 in head; 

 ventral part of trunk with 13 to 15 narrow white cross bars separated by 

 broader black cross bars spicifer 



1&. Snout equal to, or slightly longer or shorter than, postorbital part of head ; 

 eye 4 to 5 in head ; trunk without cross bars ; 3 black stripes radiating 

 from eye djarong 



SYNGNATHUS SPICIFER Ruppell 



Byngnuthus spicifer RUppell, 1840, p. 143, pi. 33, fig. 4 (Abyssinia).— Smith, 

 1033a, p. 84 (Chantabun River) .—Fowleb, 1935a, p. 133 (Paknam). 



This species of the Indo-Australian Archipelago, Malaya, India, 

 East Africa, China, Philippines, and various Pacific islands, seems to 

 live indifferently in the sea, in brackish estuaries, and in fresh-water 

 streams. 



