792 



COMPENDIUM OF GENERIC DISTINCTIONS. 



Genus. Ctenomys. 



Teeth. I. 



i i 



P. 



i i 3 i 



, M. - 



20. Molars 



i i i i 33 



decreasing in size from first to last; rootless and 

 simple. 



Order. U NGULXTA. 



Teeth. Incisors and canines often absent in one 

 or both jaws. Molars all similar, when present. 

 Limbs. Toes large, covered with hoofs. 



Furcipeda. 

 Two middle toes large and equal. 



Family. BtfviDJE. 



oo 33 6 



Teeth. I. or , M. -. 



44 44 6 



Head. Mostly horns on frontal bones. 

 Limbs. Two middle toes separate. 

 Gullet and stomach, complex. 



Tribe /. BOVINA. 



Horns developed into permanent sheath, set upon 

 the bony " core " or process from the frontal bone. 



Sub-tribe. B6ve<z. 



Teeth. Incisors nearly equal, and projecting 

 slightly outwards. 



Horns. Smooth, bent outward, and curved up- 

 wards at tip. 



Head. Nose broad, nostrils at side. 



Limbs. Knee below the middle of fore-leg. 



Horns not ridged or knobbed. 



Genus. Bos. 



Horns. Cylindrical and conical, curved upwards 

 and outwards. 



Head. Frontal and facial portions of skull equal. 

 Dorsal ridge distinct. 

 Habitat. Nearly all the world. 



Genus. Bubalus. 



Horns. Depressed or angular at base. 

 Head. Forehead convex. 

 Habitat. Africa and Asia. 



Genus. Bibos. 



Horns depressed at base. 



Shoulders very high, on account of the processes 

 of the dorsal vertebrae. 

 Habitat. Asia. 



Genus. Bison. 



Horns round, and rather depressed at base ; 

 lateral, and curved upwards and outwards. 



Head. Muzzle short and rather wide. 



Body covered with short crisp hair, longer on the 

 head, neck, and shoulders. Dewlap none. 



Habitat. Europe and North America. 



Genus. Poephagus. 



Horns nearly cylindrical, curved outward. 

 Nose hairy ; muzzle narrow and bald between 

 nostrils. 



Tail moderate, with thick, long hair. 

 Habitat. Thibet. 



Genus. Ovibos. 



Horns (of male) very broad at base, bent down- 

 wards over sides of face, and hooked upwards at 

 tip. Those of the female smaller, and their bases 

 farther apart. 



Nose all hairy. 



Tail short, and hidden by long hair of hind- 

 quarters. 



Habitat. North America. 



Sub-tribe. A ntilopea. 



I. Antelopes of the Field. Nostrils without hair 

 inside. 



Horns lyrate, sometimes conical; set over eye- 

 brows. 



Limbs slight, and hoofs small. 



Tail short, with long hairs at base. 



Genus. Gazella. 



Horns. Moderate, lyrate; nose, tapering. Fe 

 males hornless. Crumen (or tear-bag, situated be 

 low the eyes) distinct. 



Habitat. Part of Asia and Africa. 



Genus. Antidorcas. 



Known by expansile white streak across back. 

 Crumen small. 

 Habitat. Southern Africa. 



Genus. /Epy'ceros* 



Horns rather long, wide, and spreading. Tuft of 

 black hair on posterior. 

 Habitat South Africa. 



Genus. Antilope. 



Horns erect, slightly spiral. Crumen large. , 

 Habitat. India. 



Genus. Tetracerus. 



Male with four horns, straight, and conical; 

 female hornless. Muzzle large. Crumen longitu- 

 dinal. 



Habitat. India. 



Genus. Calotragus. 



Horns erect, slight, and tapering; female horn- 

 less. Crumen arched. Knees tuftless. 

 Habitat. Southern Africa. 



Genus. Scopophorus. 



Horns slight and tapering ; female hornless. 

 Crumen transverse. Knees tufted. 

 Habitat. Southern Africa. 



Genus. Oreotragus. 



Horns slight and tapering; female hornless. 

 Crumen transverse. Hoofs square, high, and con- 

 tracted. 



Habitat. Southern Africa. 



