PLATE 17b. 



RHINOBATIDAE and RAIIDAE. 



Fig. 1-2. Rhinobatus acutus (Page 273). Fig. 3. Raia kincaidii (Page 343). 



1. Dorsal view of a specimen 13t\ inches long. 



2. Head from below. 



3. Dorsal view of a specimen 12 inches long. 



