176 " ENDEAVOUK "' SCIENTIFIC RESULTS. 



Urolophus viridis, sp. nov. 



Green-backed Stingaree. 



(Plate li.) 



Breadth of the disc 0.07 greater than the length from the 

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

 end to the middle of the vent 1 .08 in the length from the same 

 point to the end of the snout. Interocular space equal to the 

 narrowest interspiracle width, and 1.6 in the preocular portion 

 of the head. Internasal width 2.5, and width of mouth 2.3 

 in the preoral portion of the head. 



Breadth of the disc greater than the length from the end of 

 the snout to the hinder margin of the ventral fins. Snout 

 more or less produced as a triangular projection beyond the 

 margin of the disc. Anterior pectoral margins shghtly 

 sinuous or almost straight, the outer angles rounded ; 

 postero -lateral margins a little convex, their junction with the 

 inner margins rounded. Eyes prominent, rather large, their 

 length equal to about half the interocular width. Inner 

 margin of the spiracle without an angular projection. Nostrils 

 without large free lobes posteriorly overhanging the angle of 

 the mouth. Posterior margin of the internasal valve with a 

 narrow border which is lobulate but not fringed ; the postero- 

 external angles form papillae which He in a groove outside the 

 hps. Median teeth with flattened cusps in the male. A 

 fimbriated hp behind the upper jaw, and several widely spaced 

 papillae behind the lower, which are variously disposed in 

 different specimens. 



Tail depressed, with a well developed fold on either side. 

 Its width between the ventral fins is equal to that of the 

 mouth ; its length from the middle of the vent is equal to or a 

 little less than that from the same point to the end of the 

 snout. The spine is inserted at about the middle of its length. 

 No dorsal fin (see note below), though a small tubercle is 

 sometimes present before the spine. Caudal fin large, narrow, 

 its width equal to about four-fifths of the internasal space ; 

 it originates below the hinder portion of the spine on the upper 

 surface, and extends forward as a ridge to beneath the anterior 

 portion of the spine beloM". 



Colour. — Light moss green above when fresh, the extreme 

 edges of the disc whitish. Iris golden. Lateral folds of tail 

 and lower surfaces porcelain white, the margins of the disc 

 purphsh. The colour of the back changes to purphsh brown 

 soon after death, and some preserved specimens have a broad 

 blackish bar crossing the interorbital space and extending 

 •outwards on either side of the eye. 



