752 
-Hydrodamalis. 
Familia IV. Hydrodamalidae. 
1481. Hydrodamalis, Retzius, 1794; Palmer, 1895. 
Rhytina , Illiger, 1811; Trt., 1898. 
Retzius, Vetensk. Acad. Nya Handl. Stoekli., XV, 1794, p. 292. 
7941. stelleri, Retzius, 1. c., 1794 — (5944 syn.). Mare Behring 
(extinctus). 
gigas, Zimmermann — (5944); Elliot, » 
Field Columb. Mus., II, 1901, p. 5, pl. 2. 
f gigas foss., Woodward — (5944). fPleistoc. I. Behring. 
