Geology. ‘. 121 
the present memoir our author examines the section of Petit-Cceur, and 
finds on one side, intercalated between the beds with belemnites and those 
containing ferns, a mass of cargneule which he considers the representa- 
tive of the triassic system, separating 7 sepa iyee and liassic series ; 
the cargneule has not however been detected on the other side of the 
supposed fuld,.where the belemnite ao are in direct contact with the 
anthracite series. It might farther be objected that the mass of cargneule, 
the usual associate of gypsum, is not alone sufficient proof of the exist- 
ence of the triassic system, since, according to Gras, gypsums accompa- 
nied by yellow altered limestones (in one case declared to be dolomite,) 
occur at two distinct horizons in the anthracitic series. 
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on teeloay of Sir Roderick Murchison, after a minute examination 
of the section at Petit Ceeur, is also most decisive as to the impossibility 
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coal flora in question. As regards the vertical range of certain fossil 
Plants he refers to a species of Calamites which extends from the carbon- 
iferous series through the permian and trias, and an Lquisetum which is 
common in the trias of Germany and yet sicenids in the oolite of Eng- 
land. (Geol. Journal, v, 178. 
_In the wise of Lombardy, Omboni has described a succession of rocks 
: kalk, underlaid by red and green sandstones, the whole being referred to 
; the triassie system. Lower still a series of limestones, dolomites and 
Py sandstones underlaid by black shales, the whole without fossils, and rest- 
=) Se spon crystalline schists and protogines, is referred to the permian 
and carboniferous formati oe he considers as identical 
ee 0, which Pec m conta useany the fos- 
— the coal period. (Bull. Soc. Cool he France, [2], xii, 517.) We 
Phe ready seen that Sismonda regards the verrucano as belonging to 
of the lias, and although associated with the anomalous liassic 
flora, as overlying the true palzeozoic coal measures 
oe * For fuller details s ers on Br subj 
ce Gaudry’s sketch of the various paper . abject, 
Butt ull. Soe, Geol. de eee nee [2h a . 0 and a Oh get se Rozet, 
ri sur leg A «ice r le terrain entre en 
en Apes d F Archiae so Hinoire de la Géologie, vii, 107- 
Geo! ince (5 - 45, ‘n nd Portlock, ibid., 1856, p. xvii, 
more ao. Vou ne, oe 85.—JAN., 1860. 
16 
