INDEX AND GLOSSARY. 



211 



Deciduous, not permanent during a 



lifetime, 426. 

 Deglutition, the act of swallowing-, 



83. 

 Dentition, form and arrangement of 



the teeth. 

 Department, a primary division of 



the animal kingdom, xiv. 

 Development of the white-fish, 115. 

 Devonian rocks, 186. 

 Diaphragm, the partition between 



the chest and abdomen, 50, 93. 

 Diastole, the dilatation of the heart, 



90. 



Digestion, 73. 



Diploctenium cordatum, 201. 

 Dipterus, 194. 



Disc, a more or less circular, flat- 

 tened body, iii. 

 Discophori, disc-shaped animals, like 



the jelly-fish, xviii. 

 Distoma, reproduction of, 130 ; in 



eye of the perch, 140. 

 Distribution of animals in time, 182. 

 Dodo, its disappearance, 178. 

 Dorsal cord, 113. 

 Dorsibranchiates, mollusks having 



gills upon the back, xviii. 

 Drift, 187, 204. 



Duck-barnacle. See Anatifa. 

 Dysaster, 200. 



Ear, 32. 



Echinoderms, radiate animals armed 

 with spines externally, like the 

 sea-urchin, xviii. 



Echinus, the sea-urchin xviii ; jaws 

 of, 77 ; heart of, 91 ; mode of pro- 

 gression, 57. 



Echinus sanguinolentus, metamor- 

 phosis of, 146. 



Egg, 102 ; form of, 103 ; formation 

 of, 104 ; ovarian, 104 ; laying of, 

 105 ; composition of, 107 ; devel- 

 opment of, 109 ; of Infusoria, 141. 



Elementary structure of organized 

 bodies, 12. 



Embryo, the young animal before 

 birth, 9, 102 ; development of, 109. 



Embryology, 102, 110 ; importance 

 of, 122. 



Endosmose, 99. See Exosmose. 



Engeena, a large ourang, 174. 



Entomostraca, xvii. 



Eocene formation, 1S6. 



Ephyra, 133, 138. 



Epidermis, the scarf-skin, 99. 



Equivocal reproduction, 127. 



Erratics, rolling stones, 204. 



Euomphalus heniisphericus, 192. 



Eurypterus remipes, 193. 



Excretions, 101. 



Exhalation, 99. 



Exosmose and Endosmose, the pro- 

 cess by winch two fluids pass each 

 way, through a membrane which 

 separates them, so as to become 

 mingled, 99. 



Eye, simple, 27 ; aggregate, 29 ; 

 compound, 30 ; destitution of, 31 ; 

 compared to a camera obscura, 27. 



Fa^ette, a very small surface, 30. 

 Family, a group including several 



genera, xiv. 



Fauna, 154 ; distribution of, 161. 

 Femur, the thigh-bone, 63. 

 Fibula, the smallest of the two bones 



of the leg, 63. 

 Fins, 70. 

 Fishes, number of, 3 ; heart of, 91 ; 



reign of, 190, 191. 

 Fissiparous reproduction, propaga- 



gation by fissure or division, 125. 

 Flight, 68. 



Fluviatile, pertaining to rivers, 3. 

 Follicles, minute pouches, 100. 

 Formation, geological, 185. 

 Fossil, dug from the earth, applied to 



the remains of animals and plants. 

 Function, the office which an organ 



is designed to perform, 5. 



Galeopithecus, its facilities for leap- 

 ins:, 69, 175. 



Galerites, 201. 



Gallinaceous, birds allied to the do- 

 mestic fowl, 161. 



Gallop, 67. 



Ganglions, scattered nervous mas- 

 ses, from which nervous threads 

 arise, 22. 



Ganoids, fishes having large, bony, 

 enamelled scales, mostly fossil, 

 xvi. 



Gasteropods, mollusks which crawl 

 by a flattened disc, or foot, on the 

 under part of the body, like the 

 snail, xvii. 



Gastric juice, 75. 



Gavial, a crocodile, with a long, 

 slender head. 



Gemmiparous reproduction, propa- 

 gation by budding, 125. 



General properties of organized 

 bodies, 11. 



