240 Canadian Record of Science. 
5. Primitia, Ulrichi, Jones. 
6. Endoceras proteiforme, Hall. 
7. Triarthrus Becki, Green. 
The above forms occur in a rather poor state of preserva- 
tion in a somewhat indurated and calcareous black bitumin- 
ous shale, 
From the islands north of Maple Cape the following 
species were determined by the writer in 1882 :— 
. Sagenella ambigua, Walcott. 
. Ptilodictya? sp. 
. Monticuliporide. 
. Leptobolus insignis, Hall. 
. Streptorhynchus filitectum ? Hall. 
. Rhynchonella increbescens, Hall. 
. Lingula Progne, Billings. 
. Primitia Ulrichi, Jones. 
. Triarthrus Becki, Green. 
10. HY Canadensis, Smith. 
OMmONooPpwWrwre 
Amongst the specimens of Triarthrus Canadensis, Smith, 
found in this collection, one specimen is especially worthy 
of note. It exhibits the two characteristic spines attached 
to the freecheeks, the glabella, and eight body segments 
attached to the head. Several pygidia also occur in the 
collection, which may properly belong to this species. 
From a second collection of fossils examined from Colling- 
wood, evidently collected by the late Alex. Murray early in 
the fifties, during his examination of the geographical distri- 
bution of the Lower Silurian formations belonging to the 
New York and Ontario systems, there are nineteen species 
found, as follows. The collection is labelled ‘‘ Nottawasaga 
Bay, Collingwood, Ont.” :— 
. Diplograptus pristis ? Hisinger. 
. Dictyograptus vel. Dictyonema sp. 
. Crinoidal fragments. 
. Lingula obtusa, Hall. 
“  Progne, Billings. 
quadrata, Kichwald. 
. Leptobolus insignis, Hall. 
. Orthis testudinaria, Dalman. 
. Streptorhynchus filitextum, Hall, 
66 
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