86 



"endeavour" scientific results. 



slightly enlarged median series of dorsal tubercles, which, 

 however, may be lost with age. It differs from the only species 

 recorded from Australia, 8. australis, Regan l , in having the 

 dorsal denticles tricarinate, and the greater part of the pectorals 

 and ventrals naked ; the tubercles on the snout are much larger 

 and differently arranged, the interspace between the spiracles is 

 less than the interocular width, and the colour marking is 

 altogether different. 



Lot'. — Great Australian 

 fathoms ; Jane, l!>13. 



Bight, Long. 127428° B., 160-200 



Family AETOBATID^E. 



Genus Aetobatus, Blainville. 



Aetobatus australis, Macleuy. 



(Fig. 3.) 



Aetobatus australis (Macleay), McCulloch, Zool. Results 

 " Endeavour," i., pt. 1, 1911, p. 15 — synonymy. 



Through the kindness of Mr. E, R. Waite, I have been able to 

 compare a New Zealand example of Aetobatus tenuicaudattis, 

 Hector-, with others of A. australis from New South Wales. 

 In general form, colour markings, and all other external 

 characters they are identical, but the teeth apparently afford 



Fig. 3 — Teeth of Aetobatus' tenuicaudatus (left) and A. australis (right.) 



specific characters, Those of the New Zealand species are 

 narrower in a longitudinal direction, and more numerous than in 

 . I. australis ; the differences are illustrated in the accompanying 

 figures. 



1 Regan— Ann. Mag. Nat. Hist. (7), xviii., 1006, p. 438. 



2 Hector— Trans. N. Zeal. Inst., ix., 1877, p. 468, pi. x. Id , Waite, 

 Rec. Cantb. Mus., i., pt. 2, 1000, p. 152, pi. xxiii. 



