478 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Greenish brown above, lighter below. Length, 991 mm. (Miiller 

 and Henle; Dumeril.) 

 India, Pinang. 



RHINOPTERA JAYAKARI Boulenger 



EJiinoptera jajfOJcari BouuiNGER, Ann. Mag. Nat. Hist., ser. 6, vol. 15, p. 141, 

 1895 (type locality: Muscat, Arabia).— Garm an, Mem. Mus. Comp. Zool., 

 vol. 36, p. 448, 1913 (copied). 



Head long as wide. Snout emarginate ; mouth width nearly equals 

 preoral length; teeth in 9 rows, those of median upper row 8 times 

 wide as long and nearly twice wide as those adjacent; median lower 

 teeth 6 times wide as long and li/^ wide as adjacent one. 



Skin smooth. 



Tail 21/^ in total length ; disk 1% times broad as long. 



Blackish above, whitish beneath. Length, 740 mm. (Boulenger.) 



Arabia. I have no way of distinguishing the imperfectly noticed 

 Rhinoptera Tieglecta Ogilby, which follows. 



RHINOPTERA NEGLECTA Ogilby 



Rhinoptera ncglecta Ogilby, Mem. Queensland Mus., vol. 1, p. 32, 1912 (type 

 locality: Moreton Bay, Queensland) ; vol. 5, p. 89, 1916 (copied). — McCxji.- 

 LooH and Whitley, Mem. Queensland Mus., vol. 8, pt. 2, p. 130, 1925 (refer- 

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

 (reference). 



Rhinoptera ja,vanica (not Miiller and Henle) DeVis, Proc. Roy. Soc. Queens- 

 land, vol. 2, pt. 1, p. 12, 1885 (Moreton Bay). 



Nine series of teeth in each jaw, those of median upper series 8 

 times wide as long and 1% times as wide as adjacent series; middle 

 lower teeth little wider than upper. Disk more than twice broad as 

 long. Median notch of snout deep. Disk width, 860 mm. 



Queensland. "This unique Australian specimen is unfortunately 

 in such wretched condition as to preclude a more detailed descrip- 

 tion." 



Family MOBULIDAE 



Head, body, and pectorals form partly rhomboid disk, wider than 

 long. Tail slender, whiplike. Head broad, flat. Eyes large, lat- 

 eral. Mouth large, transverse. Teeth small, numerous, in pave- 

 ment. Gill openings large. Spiracles moderate, behind orbits. 

 Small triangular dorsal on tail, above and between ventrals. Pec- 

 torals wide, triangular, not continuous at side of head, acute angled 

 laterally and posteriorly. Cephalic fin as separated section of pec- 

 torals, extended forward as hornlike extension from each side. 

 Ventrals small, between pectorals. 



Gigantic rays, remarkable for their great width, which sometimes 

 reaches 610 cm. with a weight of 4 tons. They are frequent in tropi- 



