42 PROF. JULIUS MACLEOD ON TEN 
TABLE XVI. 
Description of Mnium cuspidatum, Hedw. 
A.— Specific limits of variation. 
[Great Britain : Borrowdale, Harleyford (Bucks), Windermere.— 
Europe: Helsingfors.— Canada : Ottawa.] 
. Length of the leaves: 39:73-7:44 mm. 
. Breadth of the leaves: 1:13-3:26 mm. 
» » F at their base: 0:62-1:26 mm. 
^ » cells: 17-22 p. 
. Number of cells: 56-146. 
. Breadth of the border: 35-89 y. 
. Number of cells of the border: 5-9. 
» marginal teeth : 18-77. 
NOAA PP wo Oo 
ped UD 
,» double marginal teeth: 0. 
10. m teeth on the nerve at the back of the leaves: 0. 
11. Length of the nerve: the nerve always reaches the summit of the leaf. 
12. Tooth at the summit of the leaves: always existing. 
3. Number of leaves: 11-28. 
14. M fruits: 1-2. 
B.— Gradation of the characters. 
[One patch: Borrowdale, 10 stems. | 
Mean interval curves. 
Intervals: 1. 2; EA 4. 5. 6. Ni 8. 9. 10. 
Length leaves (mm.)...... 1:31 185 227 266 9202 3:20 861 8:86 421 441 
Breadth leaves (mm.) .... 1:08 1L:44 1:65 179 1:80 L85 1:91 L88 1:80 1:66 
» —base (mm.) ...... 081 0:96 100 1:01 100 096 095 0:88 080 0:76 
S AMEND Sii. wo nm « 9 3. 9 —90..I9 i9 
Penn Der celle i. muere 58 79 81 81 85 86 88 88 86 80 
Breadth border (p) ...... 0122 8.70.7 07 70-80. EB. (40%, 02... 6S 
UBI DordeR ve iere « 00 9:4: 100. 10:3) 10:3: 1031. |9:8...05..80..84. 77 
Maremal teeth... ss. ve 8 15 2b 82 36 96 4] 41 4l 40 38 
Double marginal teeth .... 0 0 0 0 0 0 0 0 0 0 
Teeth nerve ........ ee 0 0 0 0 0 0 0... 0 0 0 
ngih nerve 9... 9o eei — t- +- t- +— +t + + + + 
Tooth summit... veces es zE T + T — ES + + + + 
