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EXPLANATION OF PLATES. 
Plate XIII. Fig. 9. Bazzania trilobata (L.) S. F. Gray. From Bryologist, 
4:68, 1901. A. Plant slightly magnified showing flagella springing 
from the underside. B. (1.) Portion of female plant with capsule. (2.) 
Capsule open. C. Involucre, perianth and base of seta enlarged. 
The involucre consists of the small leaves at the bottom of the fig- 
ure. D. Male plant seen from below, showing antheridial branch, 
minute underleaves and incubous arrangement of leaves. E. & F. 
Illustrate spiral elators, spores and cell structure of leaf which cannot 
be seen clearly with a hand-lens. 
Fig. 10. Radula complanata Dumort. A. Plant natural size. B. Branch 
with fruit showing clearly the seta and capsule, with tjie calyptra at 
base of seta showing through the transparent tubular perianth, and at 
base of the perianth, the involucre. This misrepresents the leaves, 
making them appear succubous. C. Leaf showing lobule with roothairs 
and larger lobe with gemmse along the edge. This illustrates the sim- 
plest forms of “ complicate-bilobed ” leaf. There are no underleaves. 
D. Calyptra. E. Spores, highly magnified. 
Fig. 11. Various species of Lejeunea, from Bryologist, 61-27, 1903. 
Showing underleaves in all but the right hand figure. Note that the 
lobule is attached to the lobe by its longer edge. 
Plate XIV. Fig. 12. Porella pinnata L. From the Bryologist, 5 : 34, 
1902. A. Underside of stem showing narrow underleaves and narrow 
lobules attached by their shorter edge to lobe. B. Single leaf showing 
lobe and lobule. 
Fig. 13. Porella platyphylla (L.) Lindb. From Bryologist, 5: 35, 1902. 
B. Upper side of stem showing perianth and emerging capsule. Also 
showing clearly incubous arrangement of leaves. C. Underside of 
stem, the leaves shown too far apart. D. Longitudinal section of 
perianth. E. Capsule. F. Leaf. G. Part of plant showing male 
branches. 
Fig. 14. Frullania. From Bryologist, 5 : 4, 1902. I. Plant of Frullania 
Eboracensis Gottsche., on the bark of birch. II. Underside of same 
showing underleaves and the queer saclike inflated lobules which 
remind one of the bladders of Utricularia. III. and IV. Under and 
upper side of F, Asagrayana Mont. V. Involucre and perianth of F. 
Eboracensis. 
Fig. 15. Ptilidium ciliare (L.) Nees. a. Leaf X 37. b. Plant with 
perianth and young capsule X 2. c. Portion of plant X 5. 
