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2. True molars of upper jaw,with quadrate crowns, with four principal 

 pyramidal and more or less distinctly trihedral lobes, divided by deep 

 valleys, not filled up by cement, but, in some genera, interrupted with 

 minor tubercles and ridges. (Owen.) Orbits, attypically, with a 

 continuous margin behind. Lower jaw, attypically, with a tubercle 

 projecting outwards. (Anthracotheroidea.) 



ANTHRACOTHERIIDAE. (XLV.) 



ARTIODACTYLI? INCERTAE SEDIS. 



SUPER-FAMILY CHALICOTHEROIDEA. 



XXVIIIa. CHALICOTHERIIDAE. 



Chalicotherium Kaup., Falc. 



PECORA. 



SUPER-FAMILY CAMELOIDEA. 



XXVIII. CAMELIDAE. 



• Genera. 



Camelus Linu. 

 Auchenia 111. 



UTerycotherium- Bojanus. 

 Poebrotheriwn Leidy. 

 Procamelus Leidy. 

 Megalomeryx Leidy. 

 Homocamelus Leidy. 

 Protomeryx Leidy. 

 Merycodus Leidy. 

 Camelops Leidy. 

 Palauchenia Owen. 



Extinct Camelidae. 



SUPER-FAMILY GIRAFFOIDEA. 

 XXIX. GIRAFFIDAE. 



Single genus. 

 Giraffa Storr ex. Briss. = Camelopardalis Cuv. 



SUPER-FAMILY BOOIBEA, 



XXX. SAIGIIDAE. 



Genus. 

 Saiga Gray. 



XXXI. BOVIDIAE. 



SUB-FAMILIES. 



(Fide auct. plar.) 



I. Form massive, with the head declined; with the neck abbreviated, the 

 third and succeeding vertebrae being much shortened. Legs stout, and 



