314 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



RHINOBATOS OCELLATUS Norman 



Rhinohatos oceUatus Norman, Proc. Zool. Soc. London, 1926, p. 967, fig. 20 



(rostra) (type locality: Bird Island, Algoa Bay). — Barnard, Ann. South 



African .AIus., vol. 21, pt. 2, p. 1015, 1927 (compiled). 

 Rhinohatvs columnae (not Bonaparte) Regan, Ann. Natal Gov. Mus., vol. 1, p. 



242, 1908 (Bird Island). — Gilchrist and Thompson, Ann. Durban Mus., 



vol. 1, pt. 3, p. 285, 1916 (references). 



Close to Rhinobatos zanzibarensis. Mouth width 3I/2 hi preoral 

 length, which more than 8 times in space from snout tip to vent; 

 nostrils moderately long, oblique, 1% in mouth width, li/^ in inter- 

 narial; space between outer nostril edge and lateral edge of snout 

 3% in preoral length, front valve extending iuA^ard well beyond 

 level of inner nostril edge, separated from that of opposite side by 

 distance 3l^ in internarial. 



Skin covered with minute denticles ; series of small, blunt spines in 

 median line of back, single pair on each shoulder, several spines 

 around orbits and above spiracles. 



First dorsal about twice high as long, origin behind ventral bases 

 space little greater than interdorsal, base 3% in interdorsal. 



Back brownish, with numerous bluish-gray ocelli, largest smaller 

 than eye. Length, 700 mm. (Norman.) 



South Africa. 



RHINOBATOS BLOCHII Muller and Henle 



Rhinohatus (Syrrhina) UocMi MtJixEai and Henle, Syst. Besclir. Plagiostomen, 

 p. 115, pi. 37, fig. 1, 1841 (type locality: Cape of Good Hope).— Gray, 

 List fish British Museum, p. 94, 1851 (Cape of Good Hope). — Dumeeil, 

 Hist. Nat. Elasmobr., vol. 1, p. 488, pi. 10, fig. 5 (scutes), 18G5 (Cai^e of 

 Good Hope). 



Rhinohatus hlochii Bleekee, Nat. Tijdschr. Nederland Indie, vol. 21, p. 58, 1860 

 (reference).— GtJNTHER, Cat. Fishes British Mus., vol. 8, p. 477, 1870 (Cape 

 of Good Hope). — Schmeltz, Cat. Mus. Godeffroy, No. 5, p. 41, 1874 (Cape 

 of Good Hope).— Peters, Monatsb. Akad. Wiss. Berlin, 1876, p. 853, 1877 

 (Cape of Good Hope). — Garman, Mem. Mus. Comp. Zool., vol. 86, p. 271, 

 1913 (Cape of Good Hope). — Gilchrist and Thompson, Ann. Durban Mus., 

 vol. 1, p. 284, 1916 (references). — Norman, Proc. Zool. Soc. London, p. 968, 

 text fig. 21, 1926 (Cape of Good Hope; Table Bay). 



Rhitioiatus blochi Barnard, Ann. South African Mus., vol. 21, p. 61, 1925 

 (Natal) ; pt. 2, p. 1014, 1927 (note). 



Snout short, broad, obtusely pointed, margins somewhat convex; 

 rostral ridges rather narrow, separated throughout length, parallel 

 anteriorly, diverging little posteriorly ; eye 3% to 4 in snout, eye with 

 spiracle I14 to 12^5 in space between spiracles ; mouth nearly straight, 

 width 214 to 2% in snout; nostrils short, oblique, 1% to nearly 

 twice mouth width, about equal internarial, front valve extending 

 inward well beyond level of inner nostril edge, nearly meeting that 

 of opposite side. Only outer spiracular fold developed, interspir- 

 acular space 1% to 1% in snout. 



