426 Scientific Intelligence. 
liberality in placing at my yay his large and valuable collection of 
the plants of the Cape Breton co: 
The general conclusions deducible from the above catalogue, as well as 
"detailed descriptions of the new species, I hope to give more fully here- 
after, when I shall have completed my examination of the microscopic 
structure of ste several coal seams. In the mean time the following sum- 
mary may be u 
“¢ Te Of 192 eines sik in the list, probably 44 ma be — as 
founded aren! on parts of plants, leaving about 148 true 
on ap Saleen with the lists of Unger, Vertis aiid Les- 
quereux, 92 seem to be common to Nova Scotia and Euro e, and 59 
to Nova Scotia Fa ‘the United States. Most of these last are — 
to Europe and the United States. There are 50 species 
far as known, to Nova Scotia, seta at yea can be little doubt shies qa 
of these will be found elsewhere. ould thus appear that the coal 
ra of Nova Scotia is more closely itd to that of Europe than : 
that of the United States, a curious circumstance in connection with 
similar relationship of the marine fauna of the period ; but additional i si 
formation may modify this view. 
3. The greater part of the species have their headquarters i in the Mid- 
ale. coal formation, and scarcely any species appear in the r 
formation that are not also found in the former. The Lower coal forma 
tion, on the other hand, seems to have a few peculiar species not found at 
ne evels. 
. The characteristic species of the Lower coal formation are Lepido- 
sodeon corrugatum, a spe Cyclopteris Acadica, both of which seem to be 
widely distributed at or near this horizon in Eastern America, while neither 
as yet been pee Sg in the true or Middle coal measures. In 
etc., Pecopteris arborescens, P. abbreviata, P. rigida, Neur tis cordala, 
Dadoxylon materiarium, Lepidophloios parvus, Sigillaria scutellata, are 
caaagragae ene though not confined to this group. . 
e coal formation, and in the central part of it, near the 
sats coal patty occur the large majority of the species of Sigillaria, 
Calamites, Lepidodendron and Ferns ; some of the species ranging 
the Millstone grit into the be coal formation, while others seem 
more narrowly limited. It is observed, ho “lg that as we leave 
the central part of the Sica ee total number of species diminishes 
both above and below, and that it is spl in those beds which hold large 
from 
numbers of plants in situ, or nearly so, that we can expect to find a abs 
variety of species, and especially a hore delicate and perishable 
nisms, 
olf e some beds 
It is also quite observable in the Joggins section that whil Cala- 
supported Sz gillaria, others, in the same part of the system, carried 04 
mites, shes, mixtures of ubesk with other plants; so peti di 
soil, Moisture, etc., frequently cause neivlboring beds to be more 
i hecten ne an sthiena ea more widely separate 
These local and temporary differences must always have occurred pet 
deposition of the coal measures, and should not sé confounded with 
general changes which are connected with lapse of time. 
