Table 1.

Summary of the cellular composition of the major brain structures of eight carnivoran species.

	Ferret	Banded mongoose	Raccoon	Cat	Dog	Striped hyena	Lion	Brown bear
	(Mustela putorius furo)	(Mungos mungo)	(Procyon lotor)	(Felis catus)	(Canis familiaris)	(Hyaena hyaena)	(Panthera leo)	(Ursus arctos)
MBD, kg	0.8	1.5	6.2	4.5	19.7	40	180	350
MBR, g	5.429	14.292	34.186	34.858	86.462	99.214	198.946	315.004
MCxT, g	3.123	9.290	24.491	24.176	65.491	67.450	139.902	222.000
MHP, g	0.329	0.428	0.477	0.876	2.010	3.366	3.648	4.130
MCB, g	0.920	1.548	3.338	5.110	7.512	14.032	24.882	45.106
MRoB, g	1.386	3.454	6.357	5.572	13.459	17.732	34.162	47.898
MOB, g	0.25	n.a.	0.47	n.a.	n.a.	n.a.	n.a.	n.a.
NBR	404.43 × 106	454.02 × 106	2,148.07 × 106	1,215.21 × 106	2,252.69 × 106	3,884.60 × 106	4,667.03 × 106	9,585.60 × 106
NCxT	38.95 × 106	115.77 × 106	437.94 × 106	249.83 × 106	527.91 × 106	495.28 × 106	545.24 × 106	250.97 × 106
NHP	3.19 × 106	2.66 × 106	15.34 × 106	8.05 × 106	8.61 × 106	18.24 × 106	13.54 × 106	8.61 × 106
NCB	351.26 × 106	315.74 × 106	1,646.18 × 106	942.90 × 106	1,676.63 × 106	3,333.83 × 106	4,049.75 × 106	9,253.25 × 106
NRoB	14.21 × 106	22.51 × 106	48.57 × 106	22.47 × 106	48.15 × 106	55.49 × 106	72.04 × 106	81.38 × 106
NOB	14.04 × 106	n.a.	55.99 × 106	n.a.	n.a.	n.a.	n.a.	n.a.
OBR	472.98 × 106	652.37 × 106	2,399.99 × 106	1,728.79 × 106	5,193.23 × 106	4,501.39 × 106	12,398.84 × 106	15,113.19 × 106
OCxT	264.06 × 106	346.56 × 106	1,766.67 × 106	1,097.10 × 106	3,416.46 × 106	2,977.76 × 106	7,260.97 × 106	10,154.00 × 106
OHP	29.31 × 106	22.96 × 106	70.00 × 106	55.95 × 106	134.05 × 106	139.82 × 106	177.11 × 106	249.16 × 106
OCB	79.60 × 106	154.26 × 106	241.32 × 106	326.10 × 106	848.68 × 106	594.29 × 106	3,044.00 × 106	2,296.75 × 106
ORoB	129.33 × 106	151.54 × 106	392.00 × 106	305.59 × 106	928.09 × 106	929.34 × 106	2,093.86 × 106	2,662.44 × 106
OOB	43.48 × 106	n.a.	79.76 × 106	n.a.	n.a.	n.a.	n.a.	n.a.
DNCxT	12,473	12,462	18,510	10,334	8,061	7,343	3,897	1,130
DNHP	9,702	6,225	16,076	9,187	4,282	5,418	3,711	2,085
DNCB	381,810	203,966	493,162	184,521	223,194	237,588	162,758	205,145
DNRoB	10,253	6,518	7,640	4,033	3,577	3,129	2,109	1,699
DNOB	56,150	n.a.	119,119	n.a.	n.a.	n.a.	n.a.	n.a.
O/NBR	1.253	1.437	1.117	1.423	2.305	1.159	2.657	1.577
O/NCXT	6.779	2.994	3.897	4.391	6.472	6.012	13.317	40.459
O/NHP	9.182	8.618	4.564	6.952	15.575	7.667	13.083	28.941
O/NCB	0.227	0.489	0.147	0.346	0.506	0.178	0.752	0.248
O/NRoB	9.101	6.731	8.071	13.598	19.275	16.749	29.063	32.714
O/NOB	3.097	n.a.	1.425	n.a.	n.a.	n.a.	n.a.	n.a.

Species are ordered according to brain mass. M, mass of body (M_BD) or brain structure; N, number of neurons; O, number of other (non-neuronal) cells; DN, neuronal density (in neurons/mg); O/N, ratio between numbers of other (non-neuronal) cells and neurons. BR, whole brain (excluding the olfactory bulb); CXT, whole cerebral cortex (gray matter, white matter and hippocampus); HP, hippocampus; CB, cerebellum; RoB, rest of brain (the sum of diencephalon + basal ganglia, mesencephalon, and pons+medulla); OB, olfactory bulb. All values refer to the two hemispheres together, calculated as 2 × values for one hemisphere.