PRIMORDIAL FAUNA AND POINT LEVI FOSSILS. 287 
The Crustacean fauna of the primordial zone of Europe. 
Paradoxides, - 
Olenus, - - 
Peltura, - - rey : ; 
Conocephalus, - These genera are all limited to the fawne primordiale, 
? . . 
WUerceephatus,* and none of the other European genera of trilobites 
are known in this fauna, 
Hydrocephalus, - 
Sao, - - - 
Arionellus, - - 
Agnostus, - - Of the first and second fauna. 
Amphion -— - Placed with doubt in the first fauna, ‘and is well deve- 
loped in the second fauna. 
The Crustacean fauna of the Quebec Group. 
Conocephalus, - , 
Arionellus,- t Genera of the primordial zone. 
Agnostus, - - A genus passing from the first to the second fauna, 
Dikellocephalus, - ) : 
Menocephalus,  - f Genera of the Potsdam period. 
Bathyurus, - . Quebec Group. 
Asaphus, - - Of the second fauna. 
Illenus, - - Of the second and third fauna. 
Amphion, Of the second fauna; and doubtfully of thejfirst fauna 
in Sweden. 
Ceraurus = Cheirurus, Of the second and third Silurian faune, and of the 
Devonian fauna. 
We have therefore in the Quebec Group, two established genera of 
the primordial zone ; one, Agnostus, which passes from the primordial 
to the second fauna: one, Amphion, cited as doubtful in the first 
fauna in Sweden, and known to be in the second; and three,—Asa- 
phus, Illenus, and Cheirurus, which begin their existence in the 
second fauna. Of these, Asaphus begins and ends in the second; 
Illenus begins with the second and continues to the third ; while 
Ceraurus (— Cheirurus) begins in the second, extends through the 
third Silurian, and appears in the Devonian fauna. 
Bathyurus is a new genus, and as yet has no stratigraphical value in 
comparisons. Those which I described as Olenus have proved to be 
not true Oleni; and though much resembling that genus, are never- 
theless distinct; and I have proposed the names Barrandia and 
Bathynotus for the two forms.t These have yet no stratigrahpical 
* Not Elliptocephalus of Emmons. 
+ Thirteenth Annual Report of the Regents of the University of N. Y., on the State Ca- 
inet of Natural History, Albany, December, 1860. 
