1906.] A lien , Mammals from Western Mexico . 255 



smaller teeth, and a greater breadth of skull in comparison with the 

 length. (Compare the table of cranial measurements with those 

 of the Sinaloa series, antea, p. 234.) 



The present series is provisionally referred to true narica of eastern 

 Mexico, rather than to molaris, which, if it really be a well-marked 

 form, is apparently confined to the coast region of western Mexico, 

 from the State of Colima northward. Lack of sufficient material 

 from eastern Mexico for a proper study of the Mexican Coatis renders 

 these determinations tentative. 



The collector's measurements are: 3 old males, total length, 1095 

 (1057-1143); head and body, 549 (536-559); tail vertebrae, 546 (521- 

 584); hind foot without claws, 93 (89-95), with claws about 10 mm. 

 more; ear from notch, 40 (38-44): 4 old females with worn teeth, 

 total length, 1047 (985-1105); head and body, 516 (483-532); tail 

 vertebras, 541 (502-584) ; hind foot, 83 (80-89) \ ear > 4 (37~43) : 6 adult 

 females, with the teeth not worn, total length, 1013 (978-1092); head 

 and body, 512 (483-584); tail vertebra?, 501 (470-546); hind foot, 88 

 (80-98); ear, 40 (38-44). 



The cranial measurements of these same specimens, with others 

 (of which the external measurements are not available), are given in 

 the subjoined table. They show the same variation with age and sex 

 as the Sinaloa series (cf. antea, p. 233), the measurements being divided 

 into three categories according to the sex and age of the specimens. 

 These measurements may be summarized as follows: 



Old males, with sagittal crests but the teeth showing practically no 

 wear (hence a little younger than the Sinaloa series of 'old males'): 

 8 specimens, total length, 133 (12 9-1 3 7); basal length, 115.5 (112-120); 

 palatal length, 80 (78-82) ; postpalatal length, 35.8 (33-38) ; zygomatic 

 breadth, 73.3 (70-78.5); interorbital breadth, 27.6 (28-34); post- 

 orbital breadth, 28 (23-33) 5 mastoid breadth, 47 . 8 (44-51 . 5) ; audital 

 bulla, 10.6 x I2 -9 ( I0 X 11-12 x I 4-5); pm 4 -m 2 , 21.6 (21-22.7); 

 height of occipital crest, 0-9. 



Old females (teeth worn): 7 specimens, total length, 127.5 (i 22 - 

 130); basal length, no (107-113); palatal length, 76.4 (73.5-79); 

 postpalatal length, 34 (33-35) ; zygomatic breadth, 63 . 4 (60-65) ; inter- 

 orbital breadth, 29.3 (27-31) ; postorbital breadth, 32 (30-33) ;mastoid 

 breadth/45 . 2 (43-47); audital bulla, 10.3 x I 3-5 ( IO X 12 or 9. 5 x 

 13-11.5 x i5);pni 4 -m 2 , 21.3 (20.6-22.7). 



Adult females (teeth wholly unworn): 9 specimens, total length, 

 125 (123-127); basal length, 109.7 (107-112); palatal length, 76.4 

 (74-78. 5); postpalatal length, 33.3 (32-34); zygomatic breadth, 61.2 



