PLATE 65. 



RHINOBATIDAE. 



Fig. 1. Rhynchobatus djiddensis. M. C. Z. 806 (Page 268). Fig. 2. Rhinobatus percel- 

 LENS. M. C. Z. 435 (Page 278). Fig. 3. Syrruina brevirostris (Page 285). 



The skeleton of the Rhinobatidae is closely allied to that of the Pristidae. The copula, hbr 1, is 

 unsegmented, the other basibranchials are broadened fused and contorted, the antorbital, ao, is extended 

 farther outward from the skull and the shoulder girdle is much widened. The basibranchials are sketched 

 from young individuals and must of course differ considerably from those of larger or adult specimens. 



