1895. ] . NEW YORK ACADEMY OF SCIENCES. 153 
lus Fauna would be found beneath that of Protolenus, for the 
reason that where consecutive deposits are laid down in a given 
basin or on a given area of the sea-bottom, the littoral fauna will 
appear first, 7. e., at the bottom of the deposit, while those of 
the deeper water will come in higher up. ‘This is a natural con- 
sequence of the continuous and steady sinking of the earth’s 
crust over a given area. If there should be oscillations in the 
movement, 7. e., alternate sinking and elevation, there will be 
lacune in the faunas, as in the Lower Cambrian of Russia, or the 
Upper Cambrian of Bohemia and northern Newfoundland. But 
the movement of depression in New Brunswick throughout 
Cambrian Time was fairly continuous, and subject to only mod- 
erate variation, and especially in the Pre-paradoxides beds, so 
that the fauna of Olenellus may yet be found in close relation to 
that of Protolenus. : 
Assises 4 and 5, as already remarked, show no trilobite fauna, 
and this seems the more probable place for the Olenellus Fauna, 
seeing that while this fauna has several genera of trilobites in 
common with the Paradoxides Fauna, it has but two that are 
found in the Protolenus Fauna. 
Finally, it should be remarked that the above conjectures as 
to the characteristics of the Protolenus Fauna and its relations 
to others, are based on our present knowledge of its constitution 
and peculiarities. Possibly further knowledge may make it 
necessary to modify these remarks in some particulars, but the 
fauna is now so well shown by the numerous species pertaining 
to ‘it, that these modifications cannot essentially change its 
aspect, or obliterate its peculiar and essential characters. 
STATED MEETING. 
March 25th, 1895: 
The Academy met and listened to the fifth public lecture of 
the course for 1894-95, by Prof. M. I. pee on ‘ Tendencies 
of Recent Electrical eeeaeok? 
100 persons were present. 
Before adjournment the following persons were nominated for 
resident membership and referred to the Council: 
