. Carnivora, Merycochoerus 
Canis sevus.. Merychus on dy) apne rng 
4 — “ 
) Haydeni. " Anchitherium ‘Giypohipp) affinis. 
: els ere intrepidus. (Parahippus) cognatus. 
Equus excelsus. 
“ _(Protohippus) perditus. 
Merychippus (Leta) Fosignia +) 
Hystrix She pation), remo mirabi 
Castor ( Hipparion s, Hippotherium occidentale. 
sbi me 
ni. sia agaeed 
Merycodus necatus. Rhino 
Procamelus occidentalis, Mastod etralo etralophoda n) mirificus. 
nas eo Niobrarensis. Biel ‘Ruclephes) imperator. 
In an appendix to this paper Dr. Leidy adds a statement of the addi- 
Binal dbasovesy of two other species of Camels in the Niobrara region,— 
one of which he calls the Procamelus robustus, and the other P. gracilis. 
The former was ae the size of the modern camel, and the other not 
larger than the Lam 
7. Noie on the Cond Graptolithus ; ny James Hartt. (The Canadian 
Naturalist and Geologist, iii, 139.)—The observations of Mr. Hall are 
pls great light oa the characteristics ‘of Graptolites. His specimens 
from New York, and the Canada Geological Survey are very numerous , 
te and various. In several, the Graptolites are much branched, and some- , 
what stellate in appearance - osianietiig of two nearly similar halves some- 
what bifurcately divided in a plane, and proceeding from a common stipe 
and uni er about the central parts by a membrane or corneous” 
Tana specimens there is no evidence of a radix or 
a car the appearance of bodies . 
Pe may have foe free im the osm” —p. 142, 
ds farther 3 
SS wall appear ‘evident from what follows, that heretofore we have 
‘been compelled to content ourselves for the most part, with describin 
gee of a — body, without knowing the original form or condi- 
