6o 



Syngnathus^. mento Bleeker, I.e. VIII. 1860, I3de Bijdr. Visch- 



fauoa Celebes, p. 13. 

 Belonichthys (Syngnathus) zambezensis Peters, Reise nach Mos- 



sambique, Zool. IV. Flussfische, 1868, p. 108. 

 Syngnathus mento Dumeril, Hist. nat. Poissons II. 1870, p. 571. 

 Belonichthys zambezensis Dumeril, ibid. p. 587 '). 

 Doryichthys mento Giinther, Cat. Brit. Mus. VIII. 1870, p. 181. 

 Syngnathus (Belonichthys) zambezensis Peters, Sitzber. Gesellsch. 



naturf. Freunde Berlin, 1881, p. 108. 

 Syngnathus (Belonichthys) mento Peters, ibid. 

 Doryrhamphus mento de Beaufort, Bijdr. Dierkunde ige Afl., 



Amsterdam, 1913, p. 102. 

 Belonichthys fluviatilis Duncker, Mitt. a. d. naturh. Mus. Hamburg, 



XXXII. 1915, p. 58. 



D. 64 70; A. 4; P. 17 20; C. 9; Rings 19 + 

 23 26; subdorsal rings n 124-4. 



Shields transversally, intermedial shields subra- 

 dially striated. Posterior rings of tail conspicuously 

 shorter than the preceding ones. Caudal equal to 

 or somewhat shorter than postorbital part of head. 

 Yellowish brown. Lower surface and operculum 

 silvery. For other characters see those of the genus. 

 Length 188 mm. [A specimen of Syngnathus mento 

 Blkr. of BLEEKER'S collection in the Leiden Museum 

 seen by us]. 



Habitat: Borneo (Sadong); Celebes (Menado, 

 in brackish water); Buru (Kajeli! in fresh water). - 

 Mossambique, Madagascar ? 



7. Choeroichthys Kaup. 



(KAUP, Cat. Lophobr. Fish, 1856, p. 552). 



Small, short, dorsally and ventrally arched. Edges 

 of the shields finely serrated or granulated, those 

 of the head smooth. Rings of tail more numerous 

 than those of trunk. Superior cristae of trunk and 

 tail continuous, inferior cristae of trunk and tail 

 discontinuous, median cristae of trunk and inferior 



i) DUNCKER unites with the present species also Hemithylaciis 

 Rocaberti A. Dumeril, Hist. nat. Poissons II. 1870, p. 600, but the 

 measurements of this species, especially the length of the head 

 Belonichthvs com P are d with that of the total length, differ essentially. 

 fluviatilis 2) In KAUP, Arch. f. Naturgesch. XIX. i. 1853, p. 233, appears 



(Ptrs). X 23 /4- onl y ^e name Choeroichthys without description. 



