172 " ENDEAVOUE SCIENTIFIC RESULTS. 



In a fine example 242 mm. wide the markings are almost 

 exactly similar to those of Richardson's figure, though the 

 contrast between the fight and dark parts is more striking ; 

 they are also well defined in two young examples and nineteen 

 foetal specimens. 



Waited has noted that foetal specimens possess a small 

 dorsal fin. It varies considerably in development in my 

 nineteen specimens ; a few have a distinct, though smafi fin 

 in advance of the spine ; in others it is represented by a mere 

 fleshy tubercle, while in most it is wholly wanting. 



Locs. — East of Flinders Island, Bass Strait. 



Off Port Davey, Tasmania, 88 fathoms. 



Near Mainwaring Cove, west coast of Tasmania, 50 

 fathoms. 



Bay of Fires, Tasmania, 40 fathoms. 



Investigator Group, South AustraUa, 37 fathoms. 



Urolophus aurantiacus, Muller & Henle ? 

 Yellow-hacked Stingaree. 

 (Plate xHx.) 

 ? Urolophus aurantiacus, Miiller & Henle, Plagiost., 1841, 

 p. 173, pi. Ivi. ; Id., Schlegel, Faun. Japon., Pisces, 

 1850, p. 307. 

 Urolophus aurantiacus, Bleeker, Nederl. Tijdschr. Dierk., 



ii., 1865, p. 68. 

 Urolophus cruciatus, Waite, Mem. Austr. Mus., iv., pt. 1, 

 1899, p. 43, and Mem. N.S. Wales Nat. Club, 2, 1904, 

 p. 10 (not U. cruciatus, Lacepede). 

 Breadth of the disc 1.01-1.06 into the length from the tip 

 of the snout to the end of the ventral fins. Tail, measured 

 from its end to the middle of the vent, 1.2-1.3 in the length 

 from the same point to the tip of the snout. Interocular 

 space a little greater than the narro\\est interspiracle width, 

 and 1.1-1.3 in the preocular portion of the head. Internasal 

 width 2.2-2.6, and width of mouth 1.4-1.7 in the preoral 

 portion of the head. 



Disc more or less angular in front, rounded laterally. The 

 snout forms a distinct triangular projection in some speci- 

 mens, but is a mere tubercle in others which scarcely breaks 

 the contour of the anterior profile. Anterior margins of 

 pectorals almost straight from the snout to the broadly 

 rounded exterior angles ; postero-lateral margins convex, 

 forming obtuse angles with the inner margins. Margins of 

 ventrals convex, the angles rounded. 



1. Waite — Mem. Austr. Mus., iv., pt. 1, 1899, p. 43. 



