76 
~=— 
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.) r 
ARTIODACTYLI? INCERTAE SEDIS. 
SUPER-FAMILY CHALICOTHEROIDEA. 
XXVIIIa. CHALICOTHERIIDAE. 
Chalicotherium Kaup., Fale. 
PECORA. 
SUPER-FAMILY CAMELOIDEA. 
XXVIII. CAMELIDAE, 
Genera. 
Camelus Linn. 
Auchenia Ill. 
Extinct Camelidae. 
Merycotherium Bojanus. 
Poebrotherium Leidy. 
Procamelus Leidy. 
Megalomeryx Leidy. 
Homocamelus Leidy. 
Protomeryx Leidy. 
Merycodus Leidy. 
Camelops Leidy. 
Palauchenia Owen. 
SUPER-FAMILY GIRAFFOIDEA. 
XXIX. GIRAFFIDAE. 
Single genus. 
Giraffa Storr ex. Briss.=Camelopardalis Cuv. 
SUPER-FAMILY BOOIDEA, 
XXX. SAIGIIDAE. 
Genus. 
Saiga Gray. 
XXXI. BOVIDIAE. 
SUB-FAMILIES, 
(Fide auct. plur.) 
I. Form massive, with the head declined; with the neck abbreviated, the 
third and succeeding vertebrae being much shortened. Legs stout, and 
