66 
Cor mack. — On a Camhial 
(3) Mere moulds or impressions retaining perhaps a 
covering-layer of coal. 
The casts were the first forms to attract attention and on 
them Suckow established his genus Catamites. Brongniart in 
1828 adopted this genus and placed it side by side with 
Equisetum thus : — 
Equisetacees f Equisetum. 
(. Equiseteae ) ' Catamites. 
This represents the view then generally accepted ; for the 
comparison of a Calamite with a reed had soon been re- 
linquished, and only the etymology of the name suggested 
phanerogamic affinities. 
The discovery of petrifactions showing minute structure at 
once introduced discord. The difference of opinion and 
nomenclature is shown in the following table : — 
CALAMITAE. 
Calamites 
(Suckow) 
Calamites 
Calamites 
Calamites 
( Calamites 
1 (Calamiteae) 
(0 
rt 
4) 
8 
'3 
w 
0 
T3 
< 
Calamitea 
C alamodendron 
Calamodendron 
g 
striata 
striaUim 
striatum 
1 
(Cotta) 
(Brongniart) 
Calamodendrees 
Calamitea 
Calamodendron 
Arthropitys 
’ (Calamodendreae) 
0 
c 
— '3 
bistriata 
bistriatum 
bistriata 
S 
(Goppert) 
>> 
0 
Williamson 
Brongniart 
Grand ’Eury 
Cotta had established a genus Calamitea which included 
C. striata and C. bistriata (and, it would seem, also some 
Conifers). C. striata was described by Unger in Petzholdt’s 
work. Secondary thickening is obvious in this plant, and 
Brongniart having regard to this fact, removed Cotta’s genus 
