268 
Fig. 2. 
Fig. 53. 
Fig. 4. 
INSECT AGENCY ON THE DISTRIBUTION OF PLANTS. 
Same, enlarged about 10 times. The lines, a-a, b-b, indicate the = of the 
e 
ctions of Fig. 53, and those marked A-A, B-B, those of Fig. 5; “ s” is the scar 
where ë the frond was Attached SA R par Per “um” ve ing dine nis ag Ben 
nch ocular 
o paper, 5 inches). 
i text, ong _ sections, as marked in Fig. 2 (objective 2 in., ocu- 
ar 2 in., dis 
Section in ihe divstien e-e, of Fig. 2: “a” young root; ‘‘c” its Bien: repo “ 
Sui its r ie ap; sa young bud; A ” lip or ever to cate krens ” upper 
ocula istance 10in ) 
mbra 3 M., 
: ag in gy Gons A-A, B-B, etc., Ea AE a 87 T o D, a nd E, end of 
st 
ol “rt” roots; “Im” and “um” same as Fig. 4 (objective 3 in., ocular 2 
. distance 5). 
Borso ntal section in the di arrows a-a of Fig. 8: “rb” the right 
and bud or most ‘anes: a ` j it o p = » the stem or axis; 
Ja Ty ” scar ; “v” the veins or ribs of the nd; the ows ‘‘a-a” show direc- 
f the pegs of Fig. 8 (0 ijastions $, aude ape 
e 5). 
: evant plan o s, with lines showing where different ude were made 
(objec 
ective 2, ae 2, yA 10 : 
Section through a-a, of Fig. 6. “ b” Pud: te” roota. “K” same as k, Fig. 4 
(objective 2, daular 2, distance 5). 
9. Diagram of the directions of the, axes of aus th of the different generations. 
. Vertical section of the bud in the positi Pee direction marked by “ e-e, 5, 
Fig. 7.” “r” root; “/” base of wal Aiai sa budl of; a: ridge or budieh 3 or ¢ 
“Im” and “ pia before. The lett ring and amplification of Figs. 10, i, 
12 pn ai are the same (objective }, Sale’ , distance 
g- 5 12, of a i Tn Pua the rudi ment of lower membrane. 
Sect ugh “ x 
E deta mthrough “FP, 2 of F Fig 7.” 9 
dra 
wing. 
- Section through “ b-b, 5 of Fig. 7.” For“ g A z” see text 
4. View of the base of the bud of Fig. 6:“ e” the wowing point or budlet of par 
»: 
next generation; “hk” corresponds vi “b” of Fig. 6; for “c” and “g ” se 
xt. 
- In text, surface view of portion of upper membrane of frond (objective š 
ocular 3 sobre e 10). 
- In text, surface view of the upper membrane of the bud (objective 4, ocular 
2, dis 
i; In ee epidermis = frond with larger cells at DP soppi ee seen under- 
ar? dis 
stance 10). 
OL tne latter 
All the preek are camera moida work except Fig. 1 and a pee òf the cells 
filling u 
p the sectional views. 
THE INFLUENCE OF INSECT-AGENCY ON THE 
DISTRIBUTION OF PLANTS. 
BY F. BUCHANAN WHITE, M.D. 
—o 
Iv urging botanists to study the influence that insect agency has 
om the distribution of plants (see vol. x., p. 334), Mr. Bennett 
