U. S. NATIONAL MUSEUM 



BULLETIN 36, PL. XXXI 



Fig. 1. CephalorhyncMis heavisidei Gray. 



(From P. J. Van Beneden, Bulletin de I'Academie Royale de Belgique, 2d series, xxxvi, 1873, pp. 32-40, 1 pi.) 



Fig. 2. Cephalorhynchus heavisidei Gray. 



(From Van Beneden and Gervais, Ost^ographie des Cetac6s, 1868-79, pi. 36, fig. 1.) 



Genus CEPHALORHYNCHUS. 



