The Utica Terrane in Canada. Lig 
T. Becki in the Utica of the Ottawa Paleozoic Basin, in 
the County of Carleton. It was armed with numerous 
spines both on its head and body, besides tubercles or 
blunted spines on the ovucipital segment and on _ the 
pygidium. 
Besides these trilobites vast numbers of the remains of 
Ceraurus pleurexanthemus occur in the shaly strata which 
crop out south of Rochesterville, Ottawa, between that vil- 
lage and Carling Lake. This form occurs here associated 
with Asaphus Canadensis and Triarthrus Becki, Green. In 
the caleareous bands of Montmorenci, Pointe aux Trembles, 
Ottawa, Whitby and Collingwood Calymene senaria occurs 
in tolerable abundance, but usually in detached fragments, 
the cephalon and pygidium only, being usually preserved. 
Amongst the cephalopoda, may be mentioned shells of 
Eindoceras proteiforme showing the large size and tapering 
character of the endosiphon as it is flanked all around 
and on each side of the septate or camerate portion of the 
shell. Individual specimens of this species have been found 
in the Utica of Gloucester and Ottawa whose probable 
length, when perfect, was not less than six feet. "Thousands 
of small orthoceratites usually referred to the genus Endo- 
ceras :—H. proteiforme, var tenuistriatum, etc., etc., are also 
found throughout the Utica from Murray Bay and Lake St. 
John to Whitby and the islands north of the Great Mani- 
toulin Island. 
These individuals resemble closely the form described by 
Professor Hall as O. lamellosum, and as they are found ap- 
pear to be true representatives of the genus Orthoceras. The 
shell in the younger examples must have been exceedingly 
delicate and thin from the mode of preservation. 
These Orthoceratites are pre-eminently characteristic of 
the Utica. 
The Glossophora or Gasteropoda are not numerous but 
interesting. As arule they are crushed and preserved as 
casts. In a few instances the lines of growth and sculpture 
is shown with considerable precision. 
Amongst the Lamellibranchiata we find such genera 
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