Mineralogy and Geology. 397 
cally colored to exhibit in detail the complicated structure of the 
Canadian extension of the Appalachians, the so-called Notre Dame 
range. Its publication is delayed by the want of topographical 
details for some portions, but the map will soon appear, and it is 
Beoppeec ip follow it by the publication oe ee of other sections, 
n the same scale. (See the Atlas, page 
oe the three years which have oft since the engraving 
of the present map, considerable progress has been made in inves- 
tigating. the rie the maritime British provinces. The pub- 
of urray upon ph ele Op show that 
the 
western portions, extensive ae “of Laurentian, Huroni- 
nand Primordial Silurian occur tow anda i Lapa. higher 
aeoke. including an area a of c oal measu the inter me- 
orti 
muna, and also of a remarkable evonian flora. A belt near the 
Brunswick, and the recent detection by Dr. Hunt of a belt of 
Laurentian in eastern Massachusetts, leads us to raat that we are 
proaching to a comprehension of the geological structure of 
= ad En gland. We look for much in this connection from the new 
cock, and confidently expect that in a second edition of the map 
before us, which will soon be required, the geology of the New 
England states will no longer be a partia rtial blank. To the geolog- 
ical student who is familiar with the region, this state of 1 things 
conveys no reproach. The wide differences in original con ition 
Boa vol Bivins beta the sediments of the contiguous western and 
ns, the comparative rarity © leareous deposits 
trates the paleozoic series in the latter, and its highly 
