128 



Index and Glossary. 



EGG 



Egg cases of sharks, 25 



Egg pouches of pipe fishes, 32 



Eggs of birds, 65 



fishes, 22 



Elasmobranchs, sharks so called from 



their laminar gills, 23 

 Electric organ of gymnotus, the 



electric eel, 28 



malapterurus, 28 



mormyrus, 28 



torpedo, 26 



Elephants, no 



Embryonic characters in vertebral 



column of sharks, 24 

 Embryos of flat fishes, 30 

 Emus, 62 

 Enamel, the hardest portion of a 



tooth, formed by the calcification 



of the outer layer or epidermis of 



the tooth papilla. 

 Epidermis, or surface layer of the 



skin of fishes, 12 

 of reptiles, 40 



Eqwus, the horse and ass genus, 91 

 Ermine, 104 



Erythacus, robin redbreast, 67 

 Exoskeleton, bony deposits in the 



skin or surface tissues, 14 

 Extensor, a muscle which straightens 



a joint. 



External gills in sharks and am- 

 phibians, 39 

 Extinct reptiles, 52 

 Eye of amphioxus, 5 

 Eyes of birds, 61 

 snakes, 46 



T7ALCONS, 69 



Fallow-deer, 98 



Fauna, the collective name applied 

 to the animals of a country or 



district. 

 Feathers, 53 

 Feeding of whales, 100 

 Feet of birds, 59 

 Felidce, 103 

 Femur, the thigh-bone. 

 Fieldfare, 66 



Fierasfer (a parasitic fish), 30 

 Filefishes, 32 

 Finches, 67 

 Fin rays, the bony filaments and 



spines which are included in the 



fins of fishes. 

 Fins of fishes, 14-19 

 Fish, epidermis of, 12 



GIL 



Fish, gills of, 8 



head of, 17, 18 



lateral line of, 15 



notochord in, 17 



scales of, 12 



shape of, 12 



tail of, 12-15 



Fistularia, or tobacco-pipe fish, 3 

 Flat fishes, 30 

 Flounders, 30 

 Flying fishes, 32 



foxes, 117 



lemurs, 115 



squirrels, 107 

 Forelimbs, ii<j. 

 Fossil amphibians, 37 



edentates, 87 



elephants, 112 



fishes, 27 



horses, 91 



mammals, 78 



reptiles, 52 

 Fowls domestic, 70 

 Fox, 103 



Freshwater and marine fishes con- 

 trasted, 22 



seals, 101 

 Frigate birds, 73 

 Frilled lizards, 43 

 Fruit bats, 117 



Fry of salmon, tail of, 15 

 Functional, capable of performing 



any duty, or of being useful in the 



economy. 

 Furculum, the merrythought of 



birds, 56 

 Fur seals, 102 



Q.ANGLIA, masses of nerve mat. 



Gannets, 73 



Ganoid fishes, fishes with burnished 



scales, 27 

 Gar pike, 32 

 Gavials, 52 

 Geckos, 43 

 Geese, 72 



Gibbons, long-armed apes, tax 

 Gill arches, 8-18 



cover, 19 



Gills of amphibians, 41 



fishes, 20- 2 1 



ganoids, 27 



lampreys, 24 



pipe-fishes, 32 



sharks, 25 



