248 BULLETIN 18 8, UNITED STATES NATIONAL MUSEUM 



caudal fin long, 1.5 times head, deeply forked, lobes pointed ; anal rays 

 iii, 5 last unbranched ray very thick, 0.8 length of head ; ventrals and 

 pectorals subequal, shorter than head, ventrals arising under twelfth 

 scale of lateral line, not reaching anal opening, ventral axillary scale 

 0.5 length of fin. 



Coloration (life) : Back and top of head golden brown, side and 

 lower part silvery white; body with narrow longitudinal stripes of 

 dark brown from head to caudal fin, nine stripes at deepest part of 

 body, the stripes on each side of lateral line most distinct; a large dark 

 spot on caudal peduncle near base of fin; head behind eye with rich 

 golden reflection; dorsal and caudal fins dusky pink, a yellow-green 

 area on base of caudal ; anal, ventral, and pectoral fins pinkish white. 



Type. — The type, 27 cm. long, was taken in the Meklong at Rajaburi, 

 Central Thailand, July 29, 1923. It remains in the collection of the 

 Thailand Bureau of Fisheries. 



Remarks. — The relations of this fish to the other local species are 

 indicated in the preceding key. The principal differential features 

 are the very elongate form, small head, small eye, slender caudal 

 peduncle, single minute barbel, long and deeply forked caudal fin, and 

 coloration. 



The fish seems to be known to the fishermen of the Meklong, as 

 shown by their use of a distinctive name, yla soi doh hua {doh 'bua., 

 lotus flower). The species is apparently rare, as only one specimen 

 was obtained in the Meklong, and it has not been found elsewhere. 



The species is named for Thavil Vongtongmark, a former assistant 

 in the Siamese Bureau of Fisheries, in appreciation of his keen interest 

 in Thai fresh-water fishes and his zeal in conservation measures. 



Genus MORULIUS Hamilton 



Morulius Hamilton, Fishes . . . River Ganges, p. 331, 1822. (Type, Cyprinus 

 morula Hamilton.) 



MORULIUS CHRYSOPHEKADION (Bleeker) 



Rohita chrysophekadion Bleeker, 1850 (25), p. 20 (Surabaya, Java). 



Morulius dinema Bleekek, 1865 (347), p. 35 (Siam). 



Morulius chrysophekadion Bleeker, 1865 (356), p. 175 (Siam). 



Ladeo chrysophekadion KAeoli, 1882, p. 179 ( Siam ) .— Vifulya, 1923, p. 225 



(Bangkok). 

 Lateo {Morulius) chrysophekadion Webee and de Beaufort, 1916, vol. 3, p. 210, 



fig. 80 (Siam).— Chevey, 1932b, p. 34, pi. 10 (Siam). 

 Labeo (Morulius) crysophekadon Hora, 1923b, p. 159 (Nontaburi, Bangkok). 

 Morulius erythrostictus Fowler, 1934a, p. 127, figs. 85, 86 (Chiengmai). 

 Morulius pectoralis Fowler, 1934b, p. 346 (Bangkok). 



This striking species, known from Java, Borneo, Sumatra, Cam- 

 bodia, Cochinchina, and Laos, as well as from Thailand, reaches a 

 length of 60 cm. Several specimens, 48 cm. long, taken in a canal in 



