An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 1
... such wonderful results to the scientific inves tigator , is different in kind from that which is employed for the commonest purposes of everyday existence . Common sense CHAPTER THE NATURAL HISTORY OF THE COMMON CRAYFISA.
... such wonderful results to the scientific inves tigator , is different in kind from that which is employed for the commonest purposes of everyday existence . Common sense CHAPTER THE NATURAL HISTORY OF THE COMMON CRAYFISA.
Pagina 16
... kind , by way of distinction , is called fluviatile , another slender - handed , another Dauric , from the region in which it lives ; and these double names are rendered by Astacus fluviatilis , Astacus leptodactylus , and Astacus ...
... kind , by way of distinction , is called fluviatile , another slender - handed , another Dauric , from the region in which it lives ; and these double names are rendered by Astacus fluviatilis , Astacus leptodactylus , and Astacus ...
Pagina 17
... kind , by way of distinction , is called fluviatile , another slender - handed , another Dauric , from the region in which it lives ; and these double names are rendered by - Astacus fluviatilis , Astacus leptodactylus , and Astacus ...
... kind , by way of distinction , is called fluviatile , another slender - handed , another Dauric , from the region in which it lives ; and these double names are rendered by - Astacus fluviatilis , Astacus leptodactylus , and Astacus ...
Pagina 39
... kind by means of eggs the co - operation of the males with the females is necessary . On the basal joint of the hindermost pair of legs of the male a small aperture is to be seen ( fig . 3 , A ; vd ) . In these , the ducts of the ...
... kind by means of eggs the co - operation of the males with the females is necessary . On the basal joint of the hindermost pair of legs of the male a small aperture is to be seen ( fig . 3 , A ; vd ) . In these , the ducts of the ...
Pagina 40
... to the swimmerets of the mother , and are carried about , protected by her abdomen , as in a kind of nursery . NEWLY - HATCHED CRAYFISHES . 41 That most careful naturalist 40 THE NATURAL HISTORY OF THE COMMON CRAYFISH .
... to the swimmerets of the mother , and are carried about , protected by her abdomen , as in a kind of nursery . NEWLY - HATCHED CRAYFISHES . 41 That most careful naturalist 40 THE NATURAL HISTORY OF THE COMMON CRAYFISH .
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