SCIENTIFIC SUMMARY. 
437 
-and those also of the Redwood j hut states that all explorations thus far 
-made have proved fruitless. The coal found on the Redwood was earthy, 
passing sometimes into good Cannel coal, or into a bituminous clay ; the 
•compact Cannel coal is in detached lumps, and occurs throughout a band about 
four feet in thickness. At another outcrop the lignitic band is in the form 
of a black bedded clay or shale, five or six feet thick, containing some coaly 
or charcoal-like fragments. Mr. "Winch ell adds that “ so far as discovered, 
there is not enough coal embraced in the cretaceous of this State to warrant 
sanguine expectation of its becoming economically useful.” (See “ Silliman’s 
American Journal,” July.) 
Cockroaches in the Carboniferous of Cape Breton. — In the u Canadian 
-Naturalist ” (Vol. VII., No. 5) Mr. Scudder describes two new species, 
having two wings, described by R. Brown. He has given them the names 
of Blattina Bretonensis and B. Heeri. They are in a duskish shale, and 
-are associated with leaves of Sphenophyllum and ferns. 
Marine Champlain Deposits on Lands north of Lake Superior. — Dr. Dawson, 
in his annual address before the Nat. Hist. Society of Montreal, May 18th, 
•says that Professor Bell, in the “ Report of the Canadian Geological Survey 
for 1870-71,” states the occurrence of marine shells, similar to those of the 
^Champlain deposits in the vicinity of Montreal, at a height of 547 feet 
above the sea. Dr. Dawson also remarks that in the hills behind Murray 
Bay and Les Eboulements, he has observed these shells at a height of at 
least 600 feet ; and also that Mr. Kennedy has recently found marine shell 
deposits of the same era on Montreal Mountain, at a height of 534 feet above 
the sea. (“ Silliman’s American Journal,” August.) 
Climate of the Champlain Period. — Dr. Dawson repeats his conclusion that 
the climate of the period when the land stood below the present level, 
“that which immediately preceded our own modern age,” was cold. 
However, it must be observed that the evidence he adduces only proves the 
■existence of cold as regards the waters. No fact is adduced by him in 
support of the supposed cold climate on land. (Annual Address before 
Montreal Nat. Hist. Society, May 18.) 
Description of the Italian Geological Map. — u Silliman’s American Journal ” 
{August, 1874) says that the first volume of the series, in illustration of the 
geology and geological map of Italy, was published at Florence in 1871, and 
the first part of the second in 1873. They are quarto volumes, beautiful in 
-style of execution, and admirable in the maps and engravings. The first 
has already been briefly noticed in “ Silliman’s Journal.” The second 
contains papers — u On the Physical Geography of the island of Ischia,” by 
Dr. C. W. C. Fuchs j “ On the Alpine Chain of the St. Gothard to be 
tunnelled for the Italico-Helvetic Railway,” by F. Giordano ; “ On the 
Tertiary Formations of the Sulphur-bearing Zone of Sicily,” by S. Mottura ; 
“ Malacologia Pliocencia Italiana,” by Dr. C. d’ Ancona, Fasc. II., genera 
Pisania, Banella, Triton , Fasciolaria, Turbinella , Cancellaria , Fusus. 
A London Clay Emu. — A tibia from the London Clay has, we learn, 
been obtained by Mr. H. S. Seeley, F.G.S. It appears to be the distal 
•extremity of the right tibia of some large struthcus bird, which approxi- 
mates both to the emu and the apteryx. However, until some more of 
the remains be found it will be impossible exactly to fix its true position. 
