468 MR. H. B. GUPPY: PLANT-DISTRIBUTION 
Explanation of Table V. 
The system of Engler is adopted, the Incompletze of Bentham and Hooker 
being added for the sake of comparison. The Archichlamydem have been 
divided by the writer into four groups :—A.:- cohorts 1-14; B.= cohorts 
15-18; C.— cohorts 19-21; D.=cohorts 22-26. The subtropics are included 
in the tropies and the extra-tropical zones are classed as temperate, 
The general results are given in the first series and the details in the second 
series. Thus it is there shown that in the first series the tropical families 
include those that occur also in temperate regions, but are mainly tropical, 
and the same with the temperate families, which include those that are 
mainly as well as those that are exclusively temperate. The third series 
deals with the aquatic and subaquatic families, concerning which other 
particulars are given in Table VI. 
In the first series the absolute numbers are enclosed in parentheses. In 
the second series they are omitted, but they are given in Table IV. 
By following Engler's system in the cases of the Cytinacez, the Cupu- 
liferze, and the Piperacez of the Incomplete the number of families has been 
inereased from 36 to 39 for that group. 
Taste VI. 
Distribution of Families of aquatic and subaquatic habit in the Old and 
New Worlds. 
Old and New Worlds, Old World. | New World. Total. 
| Monocotyledons ...... 11 1 l 13 
Archichlamyde A ; a 1 l 
A Ba 3 3 1 7 
| L p 1 | 1 2 
| s Bui 2 2 
| Eympeatale- at. issos: 1 | 
ES j ee T. MES | 
| 18 4 4 26 | 
Other details are given in Table V. and the groups A, D, C, D, are 
there explained, 
