Table 1.

Sample statistics for specimens examined

Species	Sex m/f/unkn.	Total specimens	Skull length, mm	Oral cavity volume, mm3	Hypoglossal canal area, mm2	SD
Pan troglodytes	17,16,11	44	190.1	113,420	10.26	2.56
Pan paniscus	23,22,7	53	164.1	71,870	7.79	2.31
Gorilla gorilla	15,14,1	30	271.6	242,080	14.28	6.42
Homo sapiens*	12,11,25	48	184.2	107,240	19.00	6.89

Oral cavity size is the product of palate length × (palate depth + mandible depth) × palate breadth. 

^*The human sample is comprised of specimens of known sex from the Terry Collection (Smithsonian Institution), miscellaneous specimens of unknown origin in the osteological collections at Duke University, and a small sample of Australians housed at the Peabody Museum, Harvard. 

unkn., unknown.