BY "W. MACLEAY, F.L.S. 377 



The dorsal surface of the head and trunk and the tail are 

 densely covered with, osseous tubercles, between which, larger 

 erect conical thorns are scattered; the pectoral fins without the 

 small tubercles, but with numerous large thorns each, standing 

 on a circular base. 



Cape York. (Chevert Exp.) 



Genus Trygon, Mull. & Henle. 



Tail tapering, without any fin or with cutaneous folds not 

 extending to its extremity, armed with, a long arrow-shaped 

 spine, serrated on each side. Body smooth or with tubercles. 

 Pectoral fins united in front. Nasal valves coalescent into a 

 quadrangular flap. Teeth flattened. 



Temperate and Tropical Seas. 



1117. Trygon uarnak, Eorsk. 



Mull. & Henle, p. 158.— Dum. Elasm., p. 585.— Gunth., Cat. 



Fishes VIII., p. 473. 



Tail without cutaneous fold, exceedingly long and slender, 

 about thrice as long as the disk. Snout rather pointed, forming 

 a distinct projection in the anterior profile, the margins meeting 

 at an angle which is fully or less than a right angle. One or 

 more large tubercles in the middle of the back ; young examples 

 are smooth, but with progressing age the entire dorsal surface 

 becomes covered with small tubercles. No large tubercles in 

 the median line of the tail. Disk about as broad as long. 

 Uniform brown, or with numerous dark brown spots ; tail of 

 young specimens with brown and white rings. 



Port Darwin. 



1118. Trygon tastinaca, Linn. 



Mull. & Henle. p. 161.— Dum. Elasm., p. 600.— Gunth., Cat. 



Pishes, VIII., p. 478. 

 Y 



