STATIS1ICS OF METASPERMAE. 
747 
36. The Marsh and Swamp Element. 
No. of | Percent. of | M. and S. per 
species. | all M.andS. |cent. of each. 
Monocotyledones.............. 145 54.8 43.8 
Archichlamydeae.............. 65 24.6 14.1 
Metachlamydeae.... .......... 54 20.4 14.1 
Total M. and S.............. MOA Wysa cea menea oxe|eaae 4 cartes aca $e 
M. and S. per cent. of all species DID laseiactiedaiha an ace aleve wage skeen son 
37. The Drier-Soil Element. 
No. of Per cent. D.S. per 
species. | of all D. S. |cent. of each. 
Monocotyledones.............. 157 18.2 47.0 
Archichlamydeae............. 377 44.1 82.2 
Metachlamydeae....... ....... 319 37.7 83.8 
Total Drier-soil.......... ... BOSE. | hears Gasleteceanisde ice sdevainsten 
D.-S. per cent. of all species... TEGO! Wasiin cnguadontssctal integrals aganreban 
In the aquatic element the preponderance of Monocotyledones 
is to be noted. This taxonomic group is also apparent as form- 
ing the greater percentage of the marsh and swamp element. 
On the other hand the Metachlamydeae are preponderant in 
the drier-soil element, although their percentage is practically 
equivalent to that of the Archichlamydeae. These statements 
are based upon the third column of figures, and thus correction 
is made for the actual numerical differences of the three taxo- 
nomic groups. In this way a more exact notion is given than 
if such correction was not made, and in general, it may be said 
that the analysis must always take into account the varying 
actual numbers of one group or another. In the marsh and 
swamp element we find an interesting confirmation, so far as 
these figures are of value in evidence, of the views stated on 
pp. 602-603 above, where the Cretaceous physiognomy is briefly 
