36 
DEPARTMENT OF PALZ ONTOLOGY. 
In charge of Prof. Henry Fairfield Osborn. 
Exhibit by J. J. Stevenson (University of the City of New 
York, Department of Geology). 
173. EURYPTERUS. 
174. By Gilbert van Ingen and W. D. Matthew (Department of 
Geology, Columbia College). 
The Middle Cambrian fossils exhibited are from Div. Ic and 
Id. The fauna isa trilobite fauna, with the genera: Paradoxides, 
Agnostus, Mucrodiscus, Conocoryphe, Ptychoparia. There are 
also Brachiopods: Protorthis, Acrothele, Lingulella, Linnarssonia ; 
Gastropods: Paleacmea,; Pteropods: Hyolithes,; Cystid plates: 
Locystites ; Sponge spicules: Protospongia. 
These fossils are from the lowest rocks of the geological scale 
and represent the earliest forms of life, which have been found in 
a fossil state, upon the earth. 
II]. LOWER AND MIDDLE CAMBRIAN FOSSILS, from St. John, 
N. B. 
The section of St. John basin is as here: 
Stages | Age Fauna 
d | Ordovician True Graptolites 
Div = 
HOE | ‘ : 
¢ Rooted Graptolites—Dictyonema 
0 | Upper Cambrian 
a 
Div yy 
IL. No fauna 
| 
Cue: | Middle Cambrian 
G Paradoxides 
Div. aRar 
Ie 
éb | Lower Cambrian Protolenus 
a | 
