ON AN UNDESCRIBED SHARK FROM PORT JACKSON. 

 By E. Pierson Ramsay, F.R.S.E., &c., and J. Douglas-Ogilby, 



Carcharias macrurus, n. sp. 



Form rounded, moderately tapering. Snout of moderate length, 

 obtuse, thickly studded with minute pores. Eyes rather nearer to 

 the end of the snout than to the anterior gill-opening. Cleft of 

 mouth deep, its gape wide. A short, but deep groove behind the 

 angle of the mouth. Nostrils obliquely transverse, much nearer 

 to the mouth than to the tip of the snout. Teeth in both jaws 

 serrated, in the upper oblique with the base swollen ; erect and 

 smaller in the lower jaw. First dorsal fin situated much nearer to 

 the tip of the snout than to the base of the caudal, and closer to 

 the end of the base of the pectoral than to the origin of the 

 ventral : second dorsal one-third of the size of the first ; the space 

 between the dorsal fins being rather more than one-third of the 

 distance between the end of the second and the base of the caudal : 

 pectorals large and falciform, reaching to beneath the end of the 

 first dorsal, its inner lobe two-ninths of the end of the outer. 

 Ventrals small with the lower margin truncate. Caudal with 

 basal pit above and below, its upper lobe one-fourth of the total 

 length, and notched near the extremity. Skin rough. Colors — 

 above plumbeous, below white ; tips of second dorsal, lower caudal 

 lobe, and pectorals, black. 



Measurements : — 



Total length ... ... ... ... ... ... 34? in. 



Depth at origin of first dorsal fin 

 Depth at root of caudal fin 

 Circumference of body 

 Breadth of body 



"^5 



14 

 42 



