STUDIES in AUSTRALIAN FISHES. 



No. 2*. 



By Allan R. McCulloch, Zoologist. 



(Plates xc.-xci., and tig. 18 ) 



MUSTKLUS ANTARCTICUS, Guilth r. 



(Plate xc, fig. 3.) 



Mustelus antarcticus, Gunther, Brit. Mas. Cat. Fish., viii., 1 s70, 

 p. 387. Id., McCoy, Prod. Zool. Vict., I., 9, 1884, pi. 

 Ixxxvii., fig. 1. 



Galeus antarclicus, Waite, Rec. Austr. Mus., iw, 1902, p. 17G, 

 fig. 19 (fetus). 



Head, to last gill opening, 5T in the length; depth, 11*1. 

 Width of head, 1*9 in its length. Snout, 3 in the head, and not 

 quite as long as the mouth is wide, including the supra-labial 

 folds. Eye, 6'5 in the head, and 2-1 in the interorbital space, 

 which is almost equal to the length of the snout. 



Form slender, tail tapering, not quite as Ion:,' as the head and 

 body. Breadth of the head greater than the height of the body. 

 Snout, long and depressed, somewhat rounded in front. Eves, 

 elongate, lateral, and placed midway between the tip of the 

 snout and the first gill-opening. Mouth angular, the tip of the 

 mandible reaching a little farther forward than the eye. Teeth 

 small, pavement-like, in many rows, each with a median, obtusely 

 angular, horizontal ridge. A long longitudinal fold at either 

 angle of the mouth ; posterior labial folds very narrow, and equal 

 to a little more than a third of each ramus of the lower lip. 

 Nostrils very large, and nearer the mouth than the tip of the 

 snout, the inner with a large simple lobe. Spiracles very small, 

 rather oblique, and placed behind the posterior angle of the eye. 

 Gill-openings decreasing in size backwards, the last placed over 

 the base of the pectoral. 



Scales minute, angular. Lateral line distinct. 

 Origin of the first dorsal almost midway between the tip of the 

 snout and that of the ventral, and a little behind the inner pos- 



* For No. 1, see p. 36. 



