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University of California Publicafions in ZooJogij [Vol.21 



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Figs. 15-20. Ventral view of crania. Fig. In, Q, X 1. Fig. 16, J, X 1. 

 Fig. 17, E, X iy2. Fig. 18, B, X 2. Fig. 19, B, X 21/2- Fig. 20, A, X 21/.. 



