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Univcrsily of Califoniid Puhlicatio>if< in Zixilogii [Vol.21 



Figs. 1-6. Dorsal view of c-raiiia. Fig. 1, Q, X 1. Fig. 2, X, X 1. Fig. 3, 

 /. X 1. Fig. 4, F. X 1'4. Fig. 5, E, X 11/2. Fig. 6, B. X 21/2. 



