An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina viii
Thomas Henry Huxley. unnecessary to burden the text ; and , under the head of Bibliography , I have given some references to the literature of the subject which may be useful to those who wish to follow it out more fully . I am indebted ...
Thomas Henry Huxley. unnecessary to burden the text ; and , under the head of Bibliography , I have given some references to the literature of the subject which may be useful to those who wish to follow it out more fully . I am indebted ...
Pagina 15
... head of Astacus fluviatilis . But granting the expediency of a technical name for the Crayfish , why should that name be double ? The reply is still , practical convenience . If there are ten children of one family , we do not call them ...
... head of Astacus fluviatilis . But granting the expediency of a technical name for the Crayfish , why should that name be double ? The reply is still , practical convenience . If there are ten children of one family , we do not call them ...
Pagina 19
... head ( cephalon ) and chest ( thorax ) com- bined , while the hinder part receives the name of abdomen . Now the exoskeleton is not of the same constitution throughout these regions . The abdomen , for example , is composed of six ...
... head ( cephalon ) and chest ( thorax ) com- bined , while the hinder part receives the name of abdomen . Now the exoskeleton is not of the same constitution throughout these regions . The abdomen , for example , is composed of six ...
Pagina 20
Thomas Henry Huxley. the region of the head , in front , from that of the thorax behind . The thorax seems at first not to be jointed at all ; but if its under , or what is better called its sternal , surface is examined carefully , it ...
Thomas Henry Huxley. the region of the head , in front , from that of the thorax behind . The thorax seems at first not to be jointed at all ; but if its under , or what is better called its sternal , surface is examined carefully , it ...
Pagina 23
... head of a stout pin is pushed between these external maxillipedes , it will be found that it passes without any difficulty into the interior of the body , through the mouth . In fact , the mouth is relatively rather a large aperture ...
... head of a stout pin is pushed between these external maxillipedes , it will be found that it passes without any difficulty into the interior of the body , through the mouth . In fact , the mouth is relatively rather a large aperture ...
Alte ediții - Afișează-le pe toate
An Introduction to the Study of Zoology, Illustrated by the Crayfish Thomas Henry Huxley Vizualizare completă - 1895 |
An Introduction to the Study of Zoology, Illustrated by the Crayfish Thomas Henry Huxley Vizualizare completă - 1902 |
Termeni și expresii frecvente
abdomen abdominal appendages abdominal somites ambulatory limbs Amurland animals antenna antennule aperture appears artery arthrobranchiæ Astacine Astacus fluviatilis Astacus torrentium attached basal joint blastomeres blood body branchiæ branchial cavity carapace cardiac cavity cephalothorax cervical groove chelate chitinous corpuscles coxopodite cray Crustacea cuticle cuticular division ecdysis Écrevisses edge endopodite English crayfish epiblast epipodite exopodite exoskeleton eye-stalk fact female filaments fluviatilis.-A forceps front ganglia ganglion gastrolith gills give rise green gland hind-gut hinder hypoblast Illustrations inner integument lateral leptodactylus less lobster longitudinal male mid-gut middle modified morphological muscle muscular nerve fibres nobilis noble crayfish nucleated cells nuclei organs ossicle outer pairs plate pleura podobranchiæ portion posterior prawns present region ridge rostrum segments septal lines setæ side somite species spermatozoa spines sternal sternum stomach structure substance surface swimmerets telson tergal tergum terminal thoracic thoracic limbs thoracic somite tissue transverse wall yelk zone