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[[preprinted]] Smithsonian Institution United States National Museum [[line]] Memorandum [[/preprinted]] C.B. = Chesapeake Beach Platanistidae [[underlined]] Heterodelphis klinderi [[/underlined]] - Teeth too small - 10 in 5 cm Symphysis short [[underlined]] Cyrtodelphis sulcatus [[/underlined]] (= [[underlined]] Schizodelphis canaliculatus [[/underlined]]) Brandt, Pl. 26 figs 28-29 - Teeth about same size, but mandible much wider. [[underline]] Acrodelphis / or champso) letochae [[/underline]] Brandt pl. 28. Teeth too near together. 5 teeth = 2 to 2 1/2 cm. Width less near symphysis, - 1.7 cm. Length to symphysis in frequent 17.8 cm against 30 cm in CB. specimen Acrodelphis ombonii - teeth about same size [[insertion]] ^ & distance apart [[/insertion]] - mandible much wider, about 3.8 cm near symphysis