LIST OF ILLUSTRATIONS. 

Wenham’s New Microscope 
Illustrations of Mosses 
Photographs of Polycistina 
Life Histories and their Lessons. 
Accommodation of Crystalline Lens, 
295 
Accumulator, 144 
Amphipleura pellucida, 303 
Aperture shutter, 14, 89 
Atrichum undulatum, 268 
Cc 
Czenis, Nymph of, 56 
Calyptra of Orthotrichum, 217 
Cloéon, Imago of, 2 
Concentric circles, 299 
Cypris, Distribution of, 81 
FD Ew 
Decomposition of light by prism, 300 
Diagram of iris, 296 
Dicranella crispa, 268 
* heteromalla, 268 
Diffraction plates, 332 
” spectra, 332-333 
Diphyscium foliosum, 243 
Distribution of Cypris, 81 
E 
Ephemerum serratum, 242 
Extra retinal images, 301 
F 
False theory of Light emission, 325- 
326 
Fissidens adantoides, 268 
Homalothecium sericeum, 344 
Hookeria lucens, 344 

108 
116 
236 
p. 
p. 
ons aval Ds 
Plate I., p. 165 
Plate II., p. 172 
Plate III., p. 197 
Plate IV., p. 200 
Plate V., p. 261 
Plate VI., p. 266 
Human Eye, Section of, 294 
Hypnum rutabulum, 244 
I 
Inverted landscape, 298 
L 
Limiting diaphragm, 14 
M 
Moss, gemme of, 218 
N 
Neckera crispa, 344 
Nymph of Czenis, 56 
Orthotrichum affine, 218 
cupulatum, 218 
>> 
saxatile, 218 
33 
P 
Plane of emergence, 325 
Posterior of eyeball, 296 
R 
Refraction diagram, 32$ 
Revolving screen, 48 
S 
Section of retina, 297 
Shipperbottom’s shutter, 48 
Spherical aberration, 299 
< 
Tilletia caries, 303 
