318 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Rhinobatus thouini VanHasselt, Algemein Konst. Letterbode, p. -, 1823 (Java) ; 

 BuU. Sci. Nat. Ferussac, vol. 2, p. 90, 1824 (Java).— Geay, List fish 

 British Museum, p. 96, 1S51 (reference). — Gijnthek, Cat. Fishes British 

 Mus., vol. 8, p. 442, 1870 (Pinang; East Indies). — Schmeltz, Cat. Mus. Godef- 

 froy. No. 5, p. 41, 1874 (Rockhampton and Port Mackay). — Mabtbns, Preuss. 

 Exped. Ost-Asien, vol. 1, p. 409, 1876 (Bangkok and Batavia). — Day, Fishes 

 of India, pt. 4, p. 732, 1878 (part). — Macleay, Proc. Linn. Soc. New South 

 Wales, vol. 6, p. 372, 1881 (West Australia; on Castelnau).— Kaboli, Ter- 

 mesz. Fiizetek, Budapest, vol. 5, p. 148, 1882 (Yokohama). — Macleay, Proc. 

 Linn. Soc. New South Wales, vol. 8, 1883, p. 280, 1884 (Hood Bay, New 

 Guinea). — Day, Fauna British India, Fishes, vol. 1, p. 44, 1889. — Baetlett, 

 Sarawak Gazette, vol. 26, No. 366, p. 134, 1896 (Buntal and Moratabas).— 

 Pellegbin, Ann. Mus. Zool. Univ. Napoli, new series, vol. 3, No. 27, p. 4, 1912 

 (Singapore; Assab). — Webee, Sfboga Exped., Fische, vol. 57, p. 597, 1913 

 (Makassar and Aru Islands). — Garman, Mem. Mus. Comp. Zool., vol. 36, p. 

 276, 1913 (Pinang).— HoEA, Mem. Asiatic Soc. Bengal, vol. 6, p. 464, 1924 

 (Tala Sap, Singora). — Chabanaud, Bull. Econom. Indo-Chiue, vol. 6, No. 169, 

 p. 563, 1924 (Gulf of Siam) ; Service Oceanogr. Peches Indo-Chine, 1* note, p. 

 5, 1926 (Gulf of Siam). — Tieant, Service Oceanogr. Peches Indo-Chine, 6* 

 note, pp. 73, 175, 1929 (Cochin China).— Suvatti, Index Fish. Siam, p. 4, 

 1937 (Canthaburi; Samut Prakan ; Maenam Wen, East Coast). 



Rhinobatus (Rhinobatus) thouini Mullee and Henle, Syst, Beschr. Plagiosto- 

 men, p. 120, 1841 ("Surinam; Mediterranean"). — DuMfiSEL, Hist. Nat. Elas- 

 mobr., vol. 1, p. .500, pi. 10, fig. 2, a-b (snout and teeth), 1865 (type locality 

 unknown; Red Sea). 



Rhinobatos thouinianus Fowler, Proc. Acad. Nat. Sci. Philadelphia, p. 460, 1904 

 (Baram, Borneo) ; Mem. Bishop Mus., vol. 10, p. 24, 1928 (compiled) ; Proc. 

 4th (1929) Pacific Sci. Congr., Java, p. 498, 1930 (reference) ; List Fish. 

 Malaya, p. 14 (246), 1938 (reference). 



Rhinobatus thouiniana Norman, Proc. Zool. Soc. London, 1926, p. 951, text fig. 5 

 (rostra) (Pinang and Malay Archipelago). 



Rhynchobatus thonini Dunckek, Mitt. Naturhist. Mus. Hamburg, vol. 21, p. 193, 

 1904 (locality?). 



? Rhinobatus coromandelicus Blainville, Bull. Soc. Philom. Paris, vol. 8, p. 121, 

 1816 (name only). 



Rhinobatus rhinobatus (not Linnaeus) Bennett, Life of Raffles, p. 694, 1830 

 (Sumatra). 



Rhinobatus {Rhinobatus) ligonifer Cantoe, Journ. Asiat. Soc. Bengal, vol. 18, 

 p. 1397, pi. 14, 1849 (type locality: Pinang, Malay Peninsula, Singnpore). — 

 Bleekee, Verb. Batav. Genootsch. (Plagiost.), vol. 24, p. 59, 1852 (Bantam 

 and Samarang). 



Rhinobatus Ugotiifer Bleekek, Nat. Ti.idschr. Nederland. Indie, vol. 3, p. 409, 

 1852 (Sampit) ; Nederland. Tijdschr. Dierk., vol. 1, p. 73, 1863 (Banka) ; 

 vol. 2, p. 172, 1865 (Siam ; reference). 



Snout rather long, expanded at tip, margins distinctly concave; 

 preorbital length 3i/^ to 3% in space between spiracles, preoral length 

 little more than 3 times mouth width. Rostral cartilage narrow, 

 expanded anteriorly, ridges converge greater part their length. Eye 

 8 to 8% in preorbital; combined eye and spiracle ly^ to nearly lyo 

 in space between spiracles. Both folds of spiracle feebly developed, 

 outer more prominent. Nostrils long, oblique, I14 in mouth width. 



