A more accurate way of measuring cranial capacity, is to make an endocranial cast and measure the amount of water the cast displaces.
2.
Based on endocranial casts, " Eotheroiodes " had a smaller endocranial volume than other contemporaneous sirenians such as " Protosiren ".
3.
Falk, an anthropologist at the State University of New York at Albany, is an expert on endocranial casts, the impressions taken of the interior of fossil skulls.