444' BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



Genus DORYICHTHYS Kaup 



Donjichthys Katjp, Arch. Naturg., vol. 19, pt. 1, p. 233, 1853. (Type, Doryichthys 

 bilineatns Heckel.) 



In this genns of fresh-water and brackish-water pipefishes, the brood 

 pouch is restricted to the abdominal region and the rather large eggs, 

 occupying cells in the skin, are protected but not covered by broad 

 plates converging from the sides of the pouch. 



Two species have been recorded from local fresh waters as follows : 



Iff. Rings 15 to 17+38 to 38 ; operculum with a complete longitudinal keel with 

 diverging ridges ; snout equal to or less than remaining part of head ; eye 

 4.5 to 5.5 in head, 2.3 to 2.75 in snout martensii 



1&. Rings 17 to 20+31 to 35 ; operculum with a complete longitudinal keel with- 

 out diverging ridges ; snout longer than remaining part of head ; eye 6.5 

 to 7 in head, 4 in snout deokhatoides 



DORYICHTHYS MARTENSII (Peters) 



Syngnathus martensii Peters, 1869b, p. 459. 



Doryichthys drachyrhynchops Fowler, 1934a, p. 145, figs. 119, 120 (Chantabun). 



This species, of strictly fresh-water habitat, has previously been 

 known from Borneo, Sumatra, and Malaya. 



Its maximum length is about 12.5 cm. 



It seems probable that Doryichthys hrachyrhyncJiops does not differ 

 from D. martensii^ to which Fowler says it is closely related. The as- 

 sumed differences are of such a minor character that, where actually 

 existent, they can hardly constitute specific distinctness. Thus, while 

 Weber and de Beaufort state for D. martensii that the snout equals the 

 remaining part of the head. Fowler gives the snout as going 21/10 to 2% 

 times in head and his figure shows the snout as practically 2 in head ; 

 whereas the eye in 7nartensii is described as going "about 4.5 times in 

 head, about 2.3 times snout," the eye in hrachyrhynchops is given as 

 514 to 5% in head and 2% to 2% in snout, but according to the pub- 

 lished figure the eye goes approximately 4 in head and 2 in snout ; and 

 the length of caudal fin, given by Weber and de Beaufort as twice as 

 long as eye, is stated by Fowler that it "appears to exceed II/2 times 

 eye," but his figure definitely shows the caudal fin as % of eye. 



DORYICHTHYS DEOKHATOIDES (Bleeker) 



Syngnathus deokhatoides Bleekbii, 1853 (89), p. 17 (Palembang, Sumatra; 



Pontianak, Borneo). 

 Doryichthys deokhatoides Hoba, 1924a, p. 474 (Tale Sap). 



As this species was known from fresh waters in the southern part 

 of the Malay Peninsula, as well as from Borneo and Sumatra, its oc- 

 currence in the Thailand part of the Malay Peninsula vras to be ex- 

 pected. Hora records a single specimen collected by Dr. Annandale 

 in the inner lake of the Tale Sap at Lampam. 



The fish reaches a length of 17.5 cm. 



