INDEX. 



431 



plants, to which remains geolo- 

 gists now resti'ict the term fossil. 



Fossil remains, 25,652 682. 



Frontispiece, explanation of, xi. 



Func'tion, the office which an organ 

 is designed to perform. 



Fun'gidae, found in the coralrag,673. 



GALAPAGOS islands, faunaof the, 622. 



Gan'glion (Gr. yayyXtW, a knot), a 

 mass of nervous matter forming a 

 centre, from which nervous fibres 

 radiate. 



Gan'glion'ic cells, 83. 



Gan'oids, fishes having large bony 

 enamelled scales, mostly fossil, xxi. 



Gases, respiration in, other than 

 atmospheric air, 394. 



Gaster'opods (Gr. y<rrep, stomach ; 

 TTOVC, a foot), molluscous animals 

 which have the locomotive organ 

 attached to the under part of the 

 body, xxii. 673. 



Gas'tric glands, 330. 



Gas'tric juice, 330. 



Gemmip'arous (Lat. gemma, a bud; 

 pario, I bring forth), propagation 

 by the growth of the young like a 

 bud from the parent, 510. 



Gemmip'arous and fissip'arous repro- 

 duction, 510 515. 



Gemmule* (dim. of gemma), the 

 embryos of radiated animals at 

 that stage when they resemble 

 ciliated monads. 



Gen'era (Genus, in the singular), a 

 group of the animal kingdom, 

 xix. ; divided into species, xix. 



Generation, alternate, 518 532; 

 consequences of, 533 547; spon- 

 taneous, 543. 



Geographical distribution of ani- 

 mals, 578 64 1 , of vegetation,639. 



Geolog'ical formations, 649. 



Germ (Lat. germen), the earliest 

 manifestation of the embryo. 



Germ, first indication of the, 4 >S. 



GestaHion (Lat. gestatio), the carry- 

 ing of the young before birth, 439. 



Gla'cial (Lat. glades, Jce), or Drift 



period, 684. 

 Glands, structure of, 419 425 ; 



elementary parts, 426; origin, 42 7 ; 



distribution of the vessels, 428. 

 Globo v se (Lat. globus,a. globe), globs- 



shaped. 

 Glob'ules (diminutive of globe) of 



chyle, 333. 



Glossopharyn'geal nerve, 104. 

 Glot'tis. the, 180. 

 Grallatores, or wading birds, xxi. 

 Grand-nurses, what, 524. 

 Granules x (dim. of granum, a grain), 



little grains. 

 Graniv'orous (Lat granum, grain ; 



voro, I devour), birds feeding on 



grain. 



Greyheads, or boulders, 684. 

 Gullet, the, 115, 345. 



HAND, the, 274278. 



Hseinapophy'sis (Gr. alp.ct, blood ; 

 a7r60D<7ic, a process of bone) ; 

 the vertebral elements which de- 

 scend from the centrum, and en- 

 close the blood-vessels in the 

 cartilages of the ribs. 



Haversian canals, 240. 



Head, the, 241251. 



Hearing, sense of, 145 161. 



Heart, the, 360 ; circulation of the 

 blood, 361375. 



Hemip'tera (Gr./^uccrv, half; -nrfpov, 

 a wing), the order of insects in 

 which the anterior wings are 

 hemelytrous ; see Elytra. 



Hepat'ic (Lat. hepar, liver), belong- 

 ing to the liver. 



Herbiv'ora (Lat. herba, grass ; 

 voro, I devour), animals which 

 subsist, on grass, xxi. 



Hermaphrodite ('Ep/uf/g, Mercury ; 

 f A<ppodirj], Venus), an individual 

 in which male and female cha- 

 racteristics are combined. 



Hex'apod (Gr. a, six ; TTVVQ, a 

 foot,) animals with six legs, sucii 

 as true insects. 



