476 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Micromesus Gill, Ann. Lyceum Nat. Hist. New York, p. 139, 1865. (Type, 



Rhlnoptera adspersa Miiller and Henle, ortliotypic.) 

 Trycera (Koch) Doderlfin, Manuale ittiologico Mediterraneo, vol. 3, p. 242, 



1885. (Type Myliohatis typica Koch= Myliohatis marginata Geoffroy Saint- 



Hilaire.) (Name in synonymy.) 



Body, head, and pectorals formed as wide lozenge-shaped disk. 

 Tail long, slender, whiplike, with basal serrated spine. Cranium 

 prominent. Eyes prominent, lateral. Teeth wide, angular, flat, in 

 pavement, median row widest. Spiracles large, behind eyes, open 

 laterally. Dorsal fin above basal part of tail. Pectorals greater de- 

 veloped in front half. Pair of rostral fins, not joined with front of 

 skull and not continuous at sides of head with pectorals. 



ANALYSIS OF SPECIES 



a\ Teeth in 7 rows; skin smooth javanica 



a". Teeth in 9 rows above. 



&\ Median row of teeth and second on each side 3 times wide as long, nar- 

 rower than row each side of median adspersa 



&'. Median row of teeth 8 times wide as long, next row 4 times jayakari 



RHINOPTERA JAVANICA Muller and Henle 



Rhinoptera javanica MtJLLEK and Henle, Syst. Beschr. Plagiostomen, p. 182, 

 pi. 58, 1841 (type locality: Java). — Bleeker, Verh. Batav Genootsch. 

 (Madura), vol. 22, p. 6, 1849 (Kammal).— Geay, List fish British Museum, 

 p. 132 1851 (reference). — Bleekee, Verh. Batav. Genootsch. (Plagiost.), 

 vol. 24, p. 89, 1S52 (Batavia, Samarang, Soerabaya). — DuMiiKiL, Hist. Nat. 

 Elasmobr., vol 1, p. 647, 1865 (Malabar). — Gxjnther, Cat. Fishes British 

 Mus., vol. 8, p. 494, 1870 (types of Rhinoptera affinis and Rhinoptera 

 smithii). — Bleeker, Nederland. Tijdschr. Dierk., vol. 4, p. 120, 1874 

 (China).— Day, Fishes of India, pt. 4, p. 744, pi. 195, fig. 4 (teeth), 18^8 

 (Kurrachee) ; Fauna British India, Fishes, [vol. 1, p. 61, fig. 25 (teeth), 

 1889.— Baetlett, Sarawak Gazette, vol. 26, No. 366, p. 134, 1896 

 (Moratabas).— DuNCKEK, Mitt. Naturhist. Mus. Ham-burg, vol. 21, p. 194, 

 1904 (locality ?).— Southwell, Ceylon Administr. Rep., 1912-13, p. E50.— 

 Gabman, Mem. Mus. Comp. Zool., vol. 36, p. 446, 1913 (Java and India). — 

 Peaeson, Ceylon Administr. Rep., 1915-18, p. PIO. — Hora, Mem. Asiatic 

 Soc. Bengal, vol. 6, p. 465, 1924 (TaleSap, Singora). — Chabanaud, Service 

 Ocganogr. Peches Indo-Chine, l*" note, p. 6, 1926 (Gulf of Siam). — Pillay, 

 Journ. Bombay Nat. Hist. Soc, vol. 33, p. 354, 1929 (Travancore). — 

 FowLEB, Proe, Acad. Nat. Sci. Philadelphia, 1929, p. 597, 1930 (Hong Kong) ; 

 Proc. 4th (1929) Pacific Sci. Congr., Java, p. 507, 1930 (reference).— 

 Umali, Philippine Dept. Agri. Comm. Pop. Bull. 6, p. 46, 1936 (Manila). — 

 RoxAs and Martin, Dept. Agri. Comm. Manila, Tech. Bull. 6, p. 17, 1937 

 (reference). — Stjvatti, Index Fish. Siam, p. 8, 1937 (reference). — Fowleb, 

 List Fish. Malaya, p. 20, 1938 (reference). 



Rhinoptera smithii Gray, List fish British Museum, p. 494, 1851 (type locality: 

 "Antarctic Seas"). 



Rhinoptera truncata (Van Hasselt) Bleekee, Verh. Batav. Genootsch. 

 (Plagiost.), vol. 24, p. 89, 1852 (East Indies). (Name in synonymy.) 



IRhinoptera aflinis Bleeker, Verh. Maatsch. Wet. Haarlem, ser. 2, vol. 18, p. 19 

 (fetus), 1863 (type locality: Guinea). 



