An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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... less use- ful object . I have desired , in fact , to show how the careful study of one of the commonest and most insignificant of animals , leads us , step by step , from every - day knowledge to the widest generalizations 4210 2 The ...
... less use- ful object . I have desired , in fact , to show how the careful study of one of the commonest and most insignificant of animals , leads us , step by step , from every - day knowledge to the widest generalizations 4210 2 The ...
Pagina
... less use- ful object . I have desired , in fact , to show how the careful study of one of the commonest and most insignificant of animals , leads us , step by step , from every - day knowledge to the widest generalizations 4210 59 ...
... less use- ful object . I have desired , in fact , to show how the careful study of one of the commonest and most insignificant of animals , leads us , step by step , from every - day knowledge to the widest generalizations 4210 59 ...
Pagina v
... less use- ful object . I have desired , in fact , to show how the careful study of one of the commonest and most insignificant of animals , leads us , step by step , from every - day knowledge to the widest generalizations 4210 and the ...
... less use- ful object . I have desired , in fact , to show how the careful study of one of the commonest and most insignificant of animals , leads us , step by step , from every - day knowledge to the widest generalizations 4210 and the ...
Pagina 4
... less information respecting the plants . and animals which come under his notice , in the stage of common knowledge ; a good many persons have acquired more or less of that accurate , but necessarily incomplete and unmethodised ...
... less information respecting the plants . and animals which come under his notice , in the stage of common knowledge ; a good many persons have acquired more or less of that accurate , but necessarily incomplete and unmethodised ...
Pagina 8
... less than those which have an easterly and westerly direction , inasmuch as the latter yield more shade from the mid - day sun . During the depth of winter , crayfishes are rarely to be seen about in a stream ; but they may be found in ...
... less than those which have an easterly and westerly direction , inasmuch as the latter yield more shade from the mid - day sun . During the depth of winter , crayfishes are rarely to be seen about in a stream ; but they may be found in ...
Termeni și expresii frecvente
abdomen abdominal appendages abdominal somite acid alimentary ambulatory limbs animals antenna antennule aperture appears artery arthrobranchiæ Astacine attached basal joint base become blastomeres blood body branchiæ branchial cavity branchial chamber branchial filaments branchiostegite canal carapace cephalic cephalothorax cervical groove chitinous convex corpuscles coxopodite crayfish Crustacea cuticle cuticular division ecdysis ectoderm ectostracum edge endopodite endosternites epiblast epimeral epipodite exopodite exoskeleton external fact fibres food-yelk forceps front ganglion gastrolith gills gives rise green gland hind-gut hypoblast inner lamina lateral less lobes lobster longitudinal male mandibles maxillipede membrane metameres morphological muscles muscular Nauplius nerve nobilis nucleated cells nuclei organs outer ovum pairs plate pleura podobranchiæ portion posterior present procephalic protopodite region ridge rostrum scaphognathite segments seta setæ side somite species spines stem sternal sternum stomach structure substance surface telson tergal tergum terminal thoracic thoracic limbs thoracic somite tissue transverse wall yelk