IXDKX. 



431 



plants, to which remains geolo- 

 gists now restrict the term fossil. 



emains, i^>. i;">2 6S2. 

 Frontispiece, explanation of, xi. 

 Func'tiou, the oth'ce which an organ 



icned to perform. 

 Fun'gida 1 , found in the coralrag,673. 



GALAPAGOS islands, fauna of the,622. 



Gan'glion (Gr. yayyXr'oi>, 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. yaorep, stomach ; 

 TTOVQ, a foot), molluscous animals 

 which have the locomotive organ 

 attached to the under part of the 

 body, x.xii. 673. 



Gas'tric glands, 330. 



Gas'tric juice, 330. 



Gemmip'arous (Lai. 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. 



Gemrnule v (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, 578 641; ofvegetation,639. 

 Geological formations, G49. 

 Germ (Lat. germen), the earliest 



manifestation of the embryo. 

 Germ, first indication of the, 405. 

 GestaHion (Lat. gestatio), the carry- 

 ing of the young before birth, 439. 



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



period, 084. 

 Glands, structure of, 41912."); 



elementary parts, 426; origin, 127 ; 



distribution of the vessels, 428. 

 Globo'se (Lat. globus,a. globe), globe- 

 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' (dim. of granum, a grain), 



little grains. 

 Graniv'orous (Lat granum, grain ; 



voro, I devour), birds feeding on 



grain. 



Greyheads, or boulders, 684. 

 Gul'let, the, 115, 345. 



HAND, the, 274278. 



Hremapophy'sis (Gr. at/ia, blood ; 

 aTTo^ucric, 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, 145161. 



Heart, the, 360 ; circulation of the 

 blood, 361375. 



Hemip'tera (Gr.ijuiav, half; Trnpov, 

 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 ('Epfu/c, Mercury ; 

 'AQpociTT], Venus), an individual 

 in which male and female cha- 

 racteristics are combined. 



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

 foot,) animals with six legs, such 

 as true insects. 



