INDEX 



55' 



Ethology, 13. 



Euglena viridis, 34, 36. 



Euplectella, 86. 



Eupomatus, trochosphere of, 199. 



Eurypterida, 260. 



Euspongia, 87. 



Eustachian tube, 358, 417, 505. 



Eutheria, 525. 



Euthyneura, 295. 



Evolution, 9. 



Excretion, 71. 



Excretory pore of nematoda, 152. 



Excretory system of nematoda, 152. 



Excretory vessels of flat-worms, 132 ; 

 of nemertean worms, 148. 



Exoccipital bones of frog, 411; of 

 mammals, 496. 



Exopodite, 216. 



Exoskeleton, 67; of sea urchin, 157, 

 of starfish, 157. 



Eye, of birds, 459, 480, 489 ; choroid of, 

 356 ; compound, of Crustacea, 228 ; 

 iris of, 356 ; of frog, 408 ; of insects, 

 250; of mammals, 518; median, of 

 amphioxus, 328 ; of molluscs, 280, 

 283, 289, 307 ; of nemertean worms, 

 148; of nereis, 196; pineal, 364, 

 450 ; pupil of, 356 ; of starfish, 160 ; 

 of vertebrates, 356, 425, 450. 



Eyeball, 356. 



Eyelid, of frog, 408. 



Eye-spot, of fluke-worm, 133. 



Eye-stalk, 216, 219. 



Facets of eye, 228. 



Facial nerve, 382. 



Fallopian tubes, 520. 



Fat bodies of frog, 427. 



Fauna, 12. 



Feather, follicle of, 461 ; germ of, 462 ; 



papilla of, 461 ; pulp of, 462 ; tracts, 



462. 

 Feathers, 460, 483; colors of, 484; 



contour of, 461 ; cubital, 463 ; 



primaries, 463 ; rectrices, 463 ; 



secondaries, 463. 

 Feather-stars, 174. 



Felis, 2, 5, 7. 



Femur, 342; of birds, 471. 



Fibula, 342, 416 ; of birds, 471. 



Fibulare, 416. 



Filoplumes, 461. 



Fimbrias of mussel, 266. 



Finger, index, 409. 



Fins, 332, 365, 372; lateral, 368; 



median, 367; paired, 367; rays of, 



365 ; of shark, 406 ; unpaired, 367. 

 Fin-skeleton, of ceratodus, 406. 

 Fish, circulation in, 351. 

 Fishes, 365; bony, 394; cartilaginous, 



365 ; teeth of, 402. 

 Fission, binary, 18, 28, 44. 

 Flabellum, 120; curvatum, 122. 

 Flagellula, 24, 33, 38. 

 Flagellum, 24, 33, 36, 38 ; of Crustacea, 



219. 



Flat-fish, 397. 

 Flat-worms, 137. 

 Flight, muscles of, in birds, 474. 

 Flocculi, of bird's brain, 480. 

 Flounder, 397. 

 Fluid, coelomic, 191. 

 Fluke-worm, 129, 135. 

 Foeces, 69. - 



Foetus, 360, 521. 

 Folliculina, 49. 

 Fontenelle, 570. 

 Foot, of frog, 409 ; of molluscs, 266, 



280, 281, 290. 

 Foramen magnum, 337. 

 Foramina, 370 ; pneumatic, 472. 

 Foraminifera, 21, 25, 26. 

 Formica rufa, 253. 

 Fornix, 515. 

 Fossils, 10. 

 Fox, flying, 526. 

 Frog, brain, 425; eyes, 408; limbs, 



408 ; metamorphosis of, 429 ; 



mouth, 408; nervous system, 425; 



nostrils, 408. 

 Frondicularia, 25. 

 Frontal bones of frog, 411; of lizard, 



340. 

 Fron to-parietal bones, 411. 



