26 PROF. JULIUS MACLEOD ON TEN 
First mernop : Identification of one fertile stem z. The figures are : 
gimpa i eei (0) length ches. ees eere 4:66 mm. 
5 ncc doctob cor TE TER ER 17855 
5 nuo DORAIN at ble DARE . ii eee hn nnn v82: 
a » (d) breadth of the cells at the em of the 
ErentesbDISAQth. 63. 0s cae c's red nn 19 y. 
5 » (e) number of cells at the place of the giviitat 
IGA Ue ARO a EO ag oret 88 
p » (f) breadth of the border at the place of the 
mprearestipneaath .. 0 5 0. ic dete 4 3 37 p. 
$5 » (g) number of cells of the border at the place 
of the greatest breadth ............... 6 
^ » (A) number of marginal teeth .............. 4l 
5 » (č) number of double teeth at the margin .... 0 
5 »  (J) teeth on the nerve at the back of the 
Hos WEE c EN CO CI A v CES DES 0 
the nerve reaches 
5 ni Ce) leneih/of themerve *- 5... srl the summit 
of the leaf. 
5; » (4) tooth at the summit of the leaf.......... exists. 
Eum On A A Und ceo e rex rere 24 
KE ogean sd p OMNE Co RR QOEM 1 
The order in which the tables may be used is arbitrary. We begin with 
Table XXV. (length) : the minimum table excludes undulatum and probably 
affine and hornum ; the maximum table does not exclude any species. 
Table XXVI. (breadth): the minimum table excludes subglobosum, punc- 
tatum, and probably affine; the maximum table excludes orthorrhynchum, 
probably serratum, and perhaps hornum. 
Table XXVII. (breadth of the leaves at their base) : no more species are 
excluded. 
Table XXVIII. (breadth of the cells): the minimum table excludes sub- 
globosum and punctatum (both already excluded), and brings confirmation 
of the exclusion of afine; no more species are excluded by the maximum 
table. 
Table XXIX. (number of cells) : no species are excluded by the minimum 
table; the maximum table brings confirmation of the exclusion of serratum, 
excludes orthorrhynchum (already excluded), and perhaps hornum. 
Table XXX. (breadth of the border): the minimum table excludes 
rostratum, spinosum, and also punctatum and subglobosum (both already 
excluded) ; no species are excluded by the maximum table. 
Hitherto eight species have been excluded and a ninth species (hornum) 
has been excluded three times, although not with certainty. It may be 
remarked that we have been prudent in excluding species, allowing a wide 
* On the measurement of the character k, see $ 35. 
