Table 10. Ratios of Semicircular Canal Arc Radius over Body Mass and Canal Length^a.

Taxon	Radius/Average Body Mass				Length/Radius
	Ant	Lat	Post	Average	Ant	Lat	Post
Marsupialia
Didelphis	0.05	0.03	0.04	0.04	5.63	5.47	6.11
Eutheria
Kulbeckia	NA	NA	NA	NA	4.80	4.29	4.75
Ukhaatherium	NA	NA	NA	NA	4.55	4.28	4.88
Zalambdalestes	NA	NA	NA	NA	4.77	4.36	4.53
Zhelestid	NA	NA	NA	NA	4.96	4.40	5.15
Afrotheria
Chrysochloris	2.47	1.52	1.5980	1.8613	4.30	3.89	5.07
Hemicentetes	1.00	0.62	0.8045	0.8068	4.52	3.59	5.41
Macroscelides	3.43	2.74	2.6670	2.9490	4.25	4.00	5.10
Elephantimorpha	NA	NA	NA	NA	4.93	4.70	4.41
Orycteropus	0.01	0.01	0.0060	0.01	4.96	5.03	.5.39
Procavia	0.05	0.05	0.06	0.05	5.14	4.28	4.90
Trichechus	0.001	0.001	0.0010	0.001	4.02	3.18	4.67
Xenarthra
Dasypus	0.035	0.03	0.040	0.03	5.91	4.63	5.88
Laurasiatheria
Atelerix	0.14	0.10	0.14	0.13	4.74	4.15	4.74
Balaenopteridae	NA	NA	NA	NA	4.19	4.05	4.94
Bathygenys	NA	NA	NA	NA	5.08	4.68	5.59
Canis	NA	NA	NA	NA	4.97	4.50	5.14
Equus	0.001	0.001	0.001	0.001	4.79	4.02	5.32
Eumetopias	0.0004	0.0004	0.0004	0.0004	4.33	4.72	4.92
Felis	0.06	0.05	0.06	0.05	4.57	4.45	4.93
Manis	0.03	0.02	0.04	0.03	4.52	3.49	4.23
Nycteris	3.31	2.97	2.70	2.99	4.48	3.91	5.51
Pteropus	0.36	0.30	0.31	0.32	4.37	4.56	5.20
Rhinolophus	4.81	4.02	4.32	4.38	4.25	4.64	5.25
Sorex	10.7	7.95	10.4	9.68	4.91	3.38	5.44
Sus	0.003	0.002	0.003	0.003	4.86	3.87	4.89
Tadarida	6.97	6.0395	6.0601	6.3556	4.62	4.45	4.88
Tursiops	0.001	0.001	0.001	0.001	3.47	3.38	5.17
Euarchontoglires
Cavia	0.26	0.22	0.22	0.23	4.79	4.13	5.02
Cynocephalus	0.19	0.15	0.17	0.17	5.15	4.75	4.94
Homo	0.004	0.003	0.004	0.004	4.61	4.39	4.76
Lepus	0.10	0.07	0.07	0.08	4.89	4.13	4.80
Macaca	0.06	0.05	0.05	0.06	4.74	4.29	5.13
Mus	5.01	3.89	4.31	4.40	4.98	4.12	5.39
Sylvilagus	0.16	0.11	0.12	0.13	4.84	4.38	5.13
Tupaia	1.32	1.10	1.14	1.18	5.35	5.46	5.40

^aRatio of radius over body mass multiplied by 100. Sources for body mass: Eumetopias [90], Homo [91], all other taxa [89].