U. S. NATIONAL MUSEUM 



BULLETIN 36, PL. XXIV 



Fig. 1. LagenorhT/nchus fitzroyi {\Y&terhoune). 



(From Waterhouse, Zoology of the Voyage of the Beagle, Mammalia, 1839, pi. 10.) 



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Fig. 2. Lagenorhynchus thicolea Gray. 



(From Gray, Synopsis of the Whales and Dolphins, 1868, pi. 36.) 



Genus LAGENORHYNCHUS. 



