1904.] Allen, Mammals from Tropical America. 6 1 



of the specimens they cannot be satisfactorily correlated with the 

 specimens. Of these 10 "adults," 7 are males and 3 are females, but 

 evidently they are not of equal age, probably including young and 

 middle-aged animals as well as some old adults. 



External Measurements. 



$ $$$$333* 

 Head and body ... 2591 2438 2388 2311 2197 2159 2236 2184 2083 



Tail 311 215 254 311 305 305 229 229 229 



Hind foot 241 235 203 221 191 203 



Ear, from base .... 254 235 254 241 241 241 254 241 210 



The male skulls measure as follows, in comparison with those of the 

 type of the species as given by Mr. Thomas. 



Measurements of Six Skulls. 



No. No. No. No. No. 

 Type. 18951 18949 18953 18955 18950 



$ $ $ $ 9 ? 



Greatest length 201 222 207 211 194 192 



Basal length (bas. to gnath.) 180 200 189 189 172 170 



Greatest breadth 86.5 88 88 90 84 79 



Nasals, length 64 65 65 70 59 64 



breadth 22.5 23 24 23.5 21.3 18.5 



Muzzle to orbit 103 112 109 in 102 104 



Breadth of braincase 58 60 55.5 58.6 54.5 55.5 



Muzzle to anterior premolar 61 65 62 62 55 56. 



Alv. length of upper toothrow 57 66 62 64 58.3 63 



Crown " " " " 60 65 63 65 61 65 



Alv. length of lower toothrow 65 71 68.7 70 66 71 



26 29 27.5 29 28 29 



The antlers in the three males, all with fully developed dentition, 

 vary greatly in size and form, two of them being obviously young 

 adults (see Figs. 15-16) and the other (No. 18951 of the above table, 

 shown in Figs. 13-14) a fully mature male with finely developed antlers. 

 The antlers of the two young adults are about as described by Mr. 

 Thomas; those of the old adult are not symmetrical, the right antler 

 being much smaller and with fewer points than the left. The right may 

 be described as a tapering spike, slightly curved outward, 185 mm. long, 

 with a single point on the anterior face, near the tip, about 20 mm. 

 long. The right antler is branched, with a sharp upward curve begin- 

 ning at the middle; the main beam, following the outside curvature, 

 has a length of 215 mm., with a sharp-pointed sub-base tine, 30 mm. 

 long, branching off from the anterointernal face 50 mm. above the 

 bur, and two other points from the posterior border of the apical third 



