, 278 | Scientific Intelligence. 
ee and many of the species are so closely allied os toeons cineca of 
: the Jura of Europe, that we cannot now hesitate to admit this system 
= into our series. I will Here repeat the paleontological evidence, whi 
onde: asteriscus, n. sp., 18 80 areas e the Liassic P. se eal 
ris, Goldfuss, that it is with seine hesitation we nate regarded it as new. — 
2d, Avicula (Monotis) meee n. sp., is very closely related to M. 
substriata, of Munster, from the Lias. - 
8d, Arca (Cucullea) ino: daeniltic’ n. sp., is very similar to C. Munsieri, 
(Zeiten, ) also from the Lias 5 
4th, Panopea (Myacites) shee i n. Ps is similar to the Liassic — 
s Mv. Binveidbee and M. Alduininus, of nsted. : 
sth, Ammonites cordiformis, n. von is of the e same typé as the Oolitic 
i e ). 
6th, Belemnites densus, n. sp., is scarcely distinguishable from 
Oolitic species B. Crniven Blai nville, if, ont it is really distinct. 
We have, also, in the pleat ey ein the Black Hills, a species of Het- 
ia, a genus not known to occur in the old world in formations newer 
thas the Lias, and a Trigonia more nearly resembling Jurassic types 
those of any other formation 
Although it is not yet et known to oceupy a large geographi ical area in 
this country, we have indications — it will be found extemal devel- ee 
oped on the eastern slope of the Rocky Mountains, from the 
part of British America to New Mexico. That it exists toward the ia ! 
waters of the Yellow Stone, around Panther and Big Horn Mountains, I : 
cannot doubt. 
In the summer of 1854, while exploring the valley of the Yellowstone 
as far as the mouth of the Bi ig Horn River, I received, from in tligent 
traders, masses of gypsum precisely like that characterizing the Jurassi¢ 
beds in the — Hills.” 
28 
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_ brara Rivers” is given, also a catalogue of all the organic remains bike : 
 erto described with a table showing their stratigraphical position. 4° 
number of Vertebrata ——— in this catalogue are siety ites: of Mollusca 
s see and one Crus’ 
Gold i 
sea 
| dosed in his official — medias : 
