PLATE 17". 



RHINOBATIDAE and RAIIDAE. 



Fig. 1-2. RniNOBATUS ACDTUs (Page 273). Fig. 3. R.u.\ kincaidii (Page 343). 



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



2. Head from below. 



3. Dorsal view of a specimen 12 inches long. 



