192 
n oductive organs, development of, 
Reptiles affinities 
classification d e 
development of, 13% 
grov „on 
Rhabiocla, $5 
Rh 
Rhh eros, 9, 139. 
R izocarpus 94 
Riccia, 8o. 
1 بد‎ age of, 110. 
A 108. 
oic, IO 
classification of, 124. 
Paleo 109. 
1 108. 
study of, 107. 
Rotatoria, 36. 
structure of, 38. 
Ruminants, 148. 
dev velopments of, 139. 
stomachs of, 73. 
nas 
Sagitta, 39. 
Salamander, 59, 61. 
Salmon, 57: 
28. 
Sands New Red, 117; 
Saprolegnia, 85. 
Selaginella , 95. 
eaves of, 99. 
Selection, artificial, 149. 
sexual, 153 
Sepals, 9 
325. 
di fference i 10152 
Sexual selection, 153. 
Shad, 57. 
Sharks, 56. 
INDEX. 
๑ 
Sharks, fossil. 115, 119 
Sheep 
ig 
Un و دو و‎ ds ds 
U 
a 
= ee 
ee 
เซ 
= 
~ 
w 
N 
=. = 
keleton, modifications of, 157. 
kin, de evelop ment of, 
Skull, characters of, 170. 
N 
en 
Slotl 
اون‎ n of, I e4 
2 of, 7 
Smut 
Snake relationship m > 
So Wages ms, vess 
Sounds of Birds E า a 152. 
Speech, A 171. 
gro 172. 
Spencer, o Es 10, PLI. 
Spener, 62. 
Spherocarpus, 89. 
Spider 
Sus 0م‎ of, 152, 
۳۷ lee, 46. 
ogyra, 8o. 
3 
c 
S 
5 
Spo 
3 
ม ม 
เก ร ย 
7 86. 
Sporocarps 
Sta ages, transitional, 13: 
Stamer 
Star- fsb, description of, 40, 
Stomata, 89, 
St, Cuthbert’s beads, 32+ 
St. Hilaire, 14. 
Structures, ‘transitory, 1 
Struggle e for e xisten 
eus es Bb us I45. 
6, 115. 
32, 134. 
ie. 5 
2% 
97- 
loo es, 
Survival of the ‘fittest, 149. 
Tenia; 35. 
dh Wa w orm, و(‎ of, 3 
Tapir, 9, 
Tardigr rada, E 
Teeth, 170. 
RES, 23. 
Pe generation, meaning of, 
osts d 5i i 
s ula 4 
Tur! bellaria, 3. 
Turtles, fossil, 
yacez, 80. 
Urinary system 
Variations, cat 
entailing « 
Vegetal ki n gd 
