102 THE MEDALS OF CREATION. Cuap. VI. 
drical or claviform divisions, with a smooth surface and 
without tubercles. The sub- 
stance of the Bignor fossils is a 
white friable earth, which strik- 
ingly contrasts with the dark 
grey malm-rock that forms the 
matrix. As the Sussex Chalk 
Chondrites appear to be distinct 
from the Tertiary species named 
by M. Brongniart C. Targioni, 
I have, at the suggestion of Mr. 
Morris, substituted C. Bigno- 
Lien. 9. riensis, to indicate the locality 
CHONDEITES BIGNORIENEIS; mat. i Sussex in which 1 @iscoveram 
Malm-rock. Bignor, Sussex. 2 
it forty years since. 
In the chalk flints ramose fuci occasionally occur, but not 
in a state of preservation that admits of the determination 
of the forms of the originals. 
The tertiary marls and limestones of Monte Bolca yield 
several beautiful species of Algz, one of which is figured in 
Lrgn. 19. It is referred to the fossil genus Delesserites 
(Sternberg), which includes those algze that have thin, and 
flat or undulated, smooth, membranous fronds, with a 
median rib. 
Of the little plants comprised in the class of cellular 
cryptogamia, which have stems, leaves, and fructification, 
but no true vessels, two or three species of Moss and Liver- 
wort have been met with in tertiary strata. Mosses as well 
as Fuci are occasionally imbedded in quartz pebbles, in 
which they appear of their natural colour, and apparently 
floating in the transparent medium. A beautiful green 
moss, with a Conferva twined round its base, is figured 
Lign. 11, p. 104, from a specimen described by the late 
Dr. Macculloch. It is supposed to be related to Hypnum 
(Geol. Trans. vol. ii.). 
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