28 
Sea iveeds are often preserved in the rocks, and examples of 
them are represented under most of the epochs from the Trenton 
to the Catskill inclusive ; the most attractive forms being under 
the Medina and Clinton epochs, Case D, Sects, n and 12. Land 
plants are represented under the Oriskany epoch by the genus 
Psilophyton, a form of Lycopod (club-moss), and under the 
Hamilton epoch, by Psilophyton, Sigillaria and Lepidodendron, 
other forms of Lycopods. See Case H, Sect. 13, and Alcove 
Case 6. A few of these are found in the Chemung, and many 
very fine specimens of large size among the fossils of the Coal 
period, in Case n. Ferns are also represented under the Hamil- 
ton and Chemung epochs ; but are largely represented under the 
Coal period, in Case o. A special collection of Devonian plants, 
from North America, of great value, is arranged in the Alcove 
Case, No. 6. Under the Cretaceous, Case p and Alcove Case, No. 
13, a few leaves of deciduous trees may be seen from the red sand- 
stones of Western Minnesota and elsewhere, among which are 
Willow, Poplar, Laurel and Dogwood. Under the Eocene there 
is a fine type series of fossil fruit from Brandon, Vt., Case P, 
Sect. 7 In the European series, Alcove Case, No. 16, there is 
shown a fine series of leaves of deciduous trees from the Miocene 
deposits of Switzerland. 
ANIMAL REMAINS. 
PROTOZOA. 
FORAMINIFERA. 
This group of animal remains are mostly of small size, generally 
minute j still they often form heavy beds of rock, many feet in 
thickness, as at Spergen Hill, Ind., where a bed, fifteen or more 
feet in thickness, is composed in great part of a minute form, re- 
presented in Alcove Case, No. 12, under the name Endothyra 
Baileyi. During the early geological periods some large forms 
occur which may be found represented under the name Recepta- 
culites in the Western Trenton and Galena epochs, Case c and 
Alcove Case, No. 2 ; and a collection of enlarged models of 
living and fossil forms of this group is on exhibition in Alcove 
