iciiTiiYOLoar. 287 



Ti:YciO>f, Adanson. 



Niisal valves coalescent) and forming a (iiiadningiilar flap. Tooth flattonod, with a 

 central point, or transverse ridge. Tail without a tin, and armed with one or two 

 lanceolate serrated spines. 



T. sKPiiKjT, Forsk. 



Upper surface of head, hody, and haso of tail covered I13' thick, flat, or eoncave, 

 many-sided tubercles. Young reddish-brown. Adults lead-coloured, with terminal 

 two-thirds of tail black. 



This species Mason says is common on the coast. It grows to a large size, 

 6 fo(>t or more across the body, and tlic wounds it can inflict with its tail are much 

 di-eaded. 



Fdmily Myliobatidae . 



Body very broad from the large doxolopmont of the pectoral fins. Tliese fins 

 are not present on the sides of the head, but reappear as a pair of detached fins at the 

 end of the snout. 



JEtod.vtis, MnUer and Henle. 



Head distinct from disk. .Snout with a soft prolongation, internally supported hy 

 fin rays. Toelh liexagonal, broad, flat, with the lower dental lamiute projecting 

 beyond the upper. Tail whip-like, dorsal fin present near its base, and with a serrated 

 posterior spine. 



JEi. N.VEI.VAKI, CuV. 



Ra-ta-ehorm-dah. Andamans. 



Tail three or four times as long as the body, triangular in section, as far as the 

 spine, and compressed behind it. Body smooth. Greyisli-olivo sometimes, greenish- 

 olive, or leaden grey, covered with black-edged, dirty-white, or bluish spots. Belly 

 ■white. Tail black. Iris golden-green. Teeth greenish-yellow. 



The Andamans. 



