FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 449 



South Africa. Leiohatus dubius based on an example but 102 mm., 

 is said to have the same coloration as the above and its slight alleged 

 structural characters are hardly distinctive. 



Genus UROLOPHOIDES Soldatov and Lindberg 



Urolophoides (Lindberg) Soldatov and Lindberg, Bull. Pacific Sci. Fisher. Inst, 

 vol. 5, p. 24, 1930. (Type, Urolophoides gigantcus (Lindberg) Soldatov 

 and Lindberg, orthotypic.) 



Disk much broader than long, longer than tail. Greatest disk 

 width opposite first % of disk length as measured from snout tip 

 to hind edge of pectorals. Tail short, stout, tip blunt, length about 

 % of disk length. Upper part of tail covered with numerous small 

 prickles; 2 strong spines at base of tail and 2 at first basal third; 

 2 needles, large, near middle of tail. No dorsal or caudal fins. Ver- 

 tical membranous fold on upper surface of tail. Skin of disk smooth, 

 except hind parts of pectorals and ventrals. 



Related to Urolophus in general appearance, but differs in the 

 absence of the caudal fin. It resembles Ddsyatis in the membranous 

 caudal fold, but differs in its short, stout, nonwhiplike tail. 



UROLOPHOIDES GIGANTEUS Soldatov and Lindberg 



Urolophoides giganteus (Lindberg) Soldatov and Lindbe2eig, Bull. Pacific Sci. 

 Fisher. Inst., vol. 5, p. 26, fig. 4, 1930 (type locality: Peter the Great 

 Bay). — Tabanetz, Bull. Pacific Sci. Inst. Fisher. Oceanogr., vol. 11, p. 52, 

 fig. 29, 1937. 



Snout longer than interorbital width or space between spiracles, 

 3% in disk length as measured to hind pectoral edge. Eye % of 

 spiracle, or 5^^ in interorbital; combined eye and spiracle 2l^ in 

 snout. Mouth width 2 in preoral length. Ventrals extend but 

 slightly behind hind ends of pectorals. Caudal needles slightly 

 longer than interorbital space, very strong, serrated, inserted behind 

 middle of tail. 



Total length, 2,320 mm., disk width, 1,780 mm. (Soldatov and 

 Lindberg.) 



Peter the Great Bay. 



Genus GYMNURA Kuhl 



Gymnura Kuhl, Algemein Konst Letterbode, May, 1823, p. 316 ; Bull. Sci. Nat. 

 Ferussac, vol. 2, p. 90, 1824. (Type, Raja micrura Schneider, monotypic. 

 Precludes Gymnura Lesson 1827, Horsfield and Vigors 1827, Nuttall 1834.) 



Aetoplatea (Valenciennes) MiJLLEE and Henle, Syst. Beschr. Plagiostomen, p. 

 175, 1841. (Type, Aetoplatea tentaculata Miiller and Henle, monotypic.) 



Aetoplatia Agassiz, Nomencl. Zool., Index, p. 10, 1846. (Type, Aetoplatea 

 tentactilata Miiller and Henle.) 



Aetoplatia Scuddeb, Nomencl. Zool., Univers. Index, p. 8, 1882. (Type, Aeto- 

 platea tentaculata Miiller and Henle.) 



