374 INDEX-GLOSSARY. 



Exoplasm (g, without ; *-XaV^, a thing formed), in Amoeba The outer 



clearer part of the body, 8. 

 Exopodite ('<%*>, without ; xov;, 'roles, a foot), in the Crayfish appendages 



The outer part of the forked end, 84. 

 Exoskeleton An external skeleton, 84, 109, 122. 

 Expiration The outbreathing of air, 129, 204, 249, 295, 316. 

 External characters Amoeba, 7 ; Vorticella, 11; Hydra, 19; Distoma, 28; 



Tsenia, 40 ; Ascaris, 47 ; Lumbricus, 54 ; Hirudo, 75 ; Astacus, 83 ; 



Anodonta, Unio, 109 ; Helix, 122 ; Amphioxus, 136 ; Scyllium, 153 ; 



Kana, 175 ; Columba, 229 ; Lepus, 268. 



Extrinsic, of muscle of any part Originating outside that part, 91, 208. 

 Eye Compound e., 103 ; Scyllium, 173 ; Rana, 221 ; Columba, 221 ; 



Lepus, 304. See also Visual Organs. 

 Eyelashes, 268. 



Eyelids, 155, 174, 222, 256, 268, 305. 

 Eye-spot, 36. 



Facet Capitular, 237, 279 ; Tubercular, 237, 279. 



Falciform (falx, a sickle ; forma, shape), sickle-shaped, 18. 



Fallopian tube, 299, 334. 



Fang, 285. 



Fat-body (corpus adiposum), 205. 



Feathers, 229, 231. 



Feeler, 103. 



Felis, 349. 



Femur (1) The thigh, or (2) the thigh bone, 176, 230, 241, 2S2. 



Fenestra (fenestra, a window) F. ovalis, 130, 219, 233, 255, 273; 

 f. rotunda, 180, 233, 255, 273. 



Ferment Bodies which excite chemical change without themselves enter- 

 ing into the reaction, 58, 94. 



Fertilization, 74 ; Hydra, 25, 26 ; Tsenia, 43 ; Ascaris, 52 ; Lumbricus, 64 ; 

 Astacus, 100; Auodonta, Unio, 119; Helix, 131; Amphioxus, 147; 

 Scyllium, 167 ; Rana, 207 ; Columba, 252 ; Lepus, 299. 



Fibrilla One of the fine threads into which muscle fibres may be split, 91. 



Filoplume A rudimentary feather, 229, 231. 



Filum terminale The filament in which the spinal cord ends, 211. 



Fins, 136, 154. 



Fin-ray, 138, 159. 



Fish Chap. ix. 



Fission (findo, fissum, split) Reproduction by spliting into two or more 

 equal parts, 10, 15. 



