TABLE 1. Raw statistics of specimens measured in this study. Number of specimens in parentheses. SD = standard deviation. CV = coefficient of variation. VAR = variance (SD squared). All measurements in mm.

	Species	Element (#Specimens)	Dimension	Mean	SD	CV	VAR
	Panthera atrox	Patella (64)	Max. Length	64.90	5.10	7.86	26.01
			Max. Width	45.35	3.55	2.43	12.60
			Max. Depth	27.70	7.82	8.76	61.15
		Astragalus (71)	Ant.-Post Length	64.60	4.05	6.27	16.40
			Max Width	41.85	5.00	11.95	25.00
			Max. Depth	37.80	2.69	7.11	7.24
	Smilodon fatalis	Patella (367)	Max Length	53.10	4.03	7.59	16.24
			Max Width	40.61	2.96	7.28	8.76
			Max Depth	25.62	2.20	8.59	4.84
		Astragalus (373)	Ant.-Post Length	44 .00	7.07	5.26	49.98
			Max. Width	60 .00	4.95	6.11	24.50
			Max Depth	27.50	10.61	6.56	112.57
		Sesamoids (174)	Max Length	23.36	2.90	12.40	8.41
			Max Width	9.59	1.12	11.71	12.54
			Max Depth	9.75	1.18	12.11	1.39
	Paramylodon harlani	Patella (55)	Max. Length	118.76	9.53	8.02	90.82
			Max. Width	105.20	6.64	4.28	44.09
			Max. Depth	58.76	4.28	7.28	18.31
		Astragalus (88)	Ant.-Post. Length	128.21	9.14	7.12	83.53
			Max. Width	134.23	9.04	6.73	81.72
			Max. Depth	85.93	7.24	8.42	52.42
		Inner sesamoid 3 (40)	Max. Length	46.20	3.07	6.65	9.42
			Max. Width	31.87	2.29	7.21	5.24
			Max. Depth	20.39	1.82	8.94	3.31
		Outer sesamoid 3 (38)	Max. Length	48.35	3.64	7.53	13.25
			Max. Width	31.87	2.68	8.40	7.18
			Max. Depth	20.61	2.00	9.71	4.00
	Nothrotheriops shastensis	Astragalus (6)	Ant.-Post Length	103.83	3.65	3.52	13.32
			Max. Width	99.17	4.02	4.05	16.16
	Camelops hesternus	Patella (37)	Max. Length	99.98	8.32	8.33	69.29
			Max. Width	54.91	5.87	10.67	34.50
			Max. Depth	43.28	4.21	9.74	17.79
		Astragalus (75)	Ant.-Post Length	78.65	10.95	13.91	119.85
			Max. Width	56.72	4.85	8.55	23.52
			Max. Depth	42.95	10.95	13.92	119.85
	Bison antiquus	Patella (87)	Max. Length	73.26	6.41	8.75	41.13
			Max. Width	69.73	5.62	8.06	31.56
			Max. Depth	44.79	4.95	11.06	24.56
		Astragalus (96)	Ant.-Post Length	84.59	5.34	6.31	28.48
			Max. Width	52.48	4.28	8.15	18.31
			Max. Depth	45.76	3.64	7.94	13.21
	Equus occidentalis	Patella (122)	Max. Length	80.48	3.91	4.86	15.31
			Max. Width	79.34	4.15	5.23	17.19
			Max. Depth	45.14	6.03	13.35	31.32
		Astragalus (101)	Ant.-Post Length	70.83	2.67	3.77	7.12
			Max. Width	65.65	3.94	5.99	15.51
			Max. Depth	58.81	3.03	5.16	9.20