Comparative anatomical aspects of the mammalian brain stem and the cord.
Assen (The Netherlands), Konink. Van Gorcum & Comp. N.V.: Vol. 1 (text): 1-338; Vol. 2 (tabs. & illus.): 1-311.
–Describes a brain of Manatus (1: 208-213); considers its central nervous system to be degenerate.
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