URAPTERA AGASSIZII. 367 



hinder parts of the pectorals. Three to six tubercles on each orbital ridge, 

 two or three above each shoulder, one to three irregular series on the tail the 

 median of which begins on the hind part of the body, in cases in a spine or spines 

 farther forward. Tail two thirds as long as the body, produced behind the 

 second dorsal. 



Greyish brown, with spots and cloudings of darker and of lighter, to uniform 

 brown, reddish about the head in life; lower surfaces white, openings of pores 

 black. 



Said to reach a length of more than seven feet. 



New Zealand and Australia. 



Uraptera. 



Uraplera Muller & Henle, 1837, Sitzb. Akad. wiss. Berlin, p. 117. 



Disk much depressed, pointed in front. Snout with a strong rostral carti- 

 lage and a wide translucent space. Pectorals extended in front of the cranium 

 but widely separated at their forward ends. Mouth, teeth, and nostrils as in 

 Raia. Tail elongate, slender, with a lateral fold on each side, and with two 

 dorsals widely separated from one another and from the end of the tail. Ventrals 

 deeply notched. Back and tail roughened with spines and tubercles. 



Uraptera agassizii. 

 Plate 53, fig. 1 (pelvis); Plate 68, fig. 2 (skeleton). 



Uraptera agassizii Muller & Henle, 1841, Plagios., p. 155, pi. 50, f. 2; Castelnau, 1855, Anim. nouv., 



Poiss., p. 100, pi. 49, f. 2; Dumeril, 1865, Elasm., p. 573. 

 Raia agassizii Gunth., 1870, Cat. fishes Brit, mus., 8, p. 465; Ribeiro, 1907, Arch. Mus. nac, 14, 



p. 177, pi. 14. 



Snout pointed. Disk rhomboid, in length to width as 9:11, front margin 

 waved, outer angle blunted, hinder rounded, length of snout little more than 

 width of internarial space. Eyelid somewhat produced. Teeth of male sharp. 

 Tail slender; dorsals small, second separated from the first by a space nearly 

 twice the length of its base, distance of second from end of tail equal length of 

 dorsals and space between them, origin of first a short distance behind the middle 

 of the tail. Back sometimes smooth. Most often there are small spines on the 

 end of the snout, scattered between the eyes and the spiracles, on the middle of 

 the back, and on the tail. Of tubercles there is one in front of each eye, one or 

 two between each eye and the spiracle, sometimes absent. Many specimens 



