2,o 



Introductory 



the plane of the face ; vomer unknown. South-western portion of Eastern 

 Holarctic region. 



XII. Genus Mazama. — Lateral metacarpals as in Rangifer ; antlers very variable 

 in size, forming a marked angle with the plane of the face, without a brow- 

 tine ; when consisting of more than a simple prong, dichotomously forked, 

 frequently with a sub-basal snag, and always with the lower prong of the 

 fork projected from the front edge of the beam, in some cases the lower, 

 in others the upper, and in others both prongs again dividing ; tail long ; 

 tarsal gland generally present; metatarsal gland very variable, both as 

 regards presence and position ; vomer dividing the inner aperture of the 

 nostrils in the skull into two distinct chambers. Western Holarctic, 

 Sonoran, and Neotropical regions. 



i. Sub-Genus Dorcelaphus. — Antlers large and complex, with a sub-basal snag, 

 and the lower prong more or less developed at the expense of the upper 

 one ; metatarsal gland usually present ; tail long or moderate, and hairy 

 below ; face very long and narrow ; the face-gland small, and the gland- 

 pit in the skull of moderate extent ; no upper canines ; size generally 

 large. Western Holarctic, Sonoran, and northern portion of Neotropical 

 region. 



ii. Sub-Genus Blasioceros. — Antlers large and complex, without a sub-basal 



snag, and the upper prong more developed than the lower one ; metatarsal 

 gland absent ; tail short ; face moderately long ; face-gland and gland- 

 pit well developed ; upper canines usually present in male. Size large 

 or rather small. Neotropical region. 



iii. Sub-Genus Xenelaphus. — Antlers small and simple, forming a single 



dichotomous fork ; metatarsal gland absent ; tail short ; face moderately 

 long ; face-gland and gland-pit well developed ; upper canines present 

 in both sexes. Size medium. Western and southern portions of 

 Neotropical region. 



iv. Sub-Genus Mazama. — Antlers in the form of simple unbranched spikes ; 



metatarsal, and in one case also the tarsal, gland absent ; tail very short ; 

 face elongated ; face-gland small and gland-pit deep and triangular ; hair 

 of face radiating from two whorls ; upper canines sometimes present in 

 old male. Size small. Neotropical region. 



XIII. Genus Pudua. — Skull and metacarpals generally as in Mazama; size very 

 small ; hair coarse and brittle ; antlers in the form of short, simple spikes ; 

 cannon-bones very short; tail very short or wanting; no whorls in the 

 hair of the face ; face-gland moderately large, and gland-pit deep and 



