An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 23
... inner edge , or that which is turned towards its fellow . It is obvious that these two limbs are well adapted to crush and tear whatever comes between them , and they are , in fact , jaws or organs of manducation . At the same time , it ...
... inner edge , or that which is turned towards its fellow . It is obvious that these two limbs are well adapted to crush and tear whatever comes between them , and they are , in fact , jaws or organs of manducation . At the same time , it ...
Pagina 25
... inner side , by a sloping wall , formed by a delicate , but more or less calcified layer of the exoskeleton , which constitutes the proper outer wall of the thorax . At the upper limit of the branchial cavity , the layer of exoskeleton ...
... inner side , by a sloping wall , formed by a delicate , but more or less calcified layer of the exoskeleton , which constitutes the proper outer wall of the thorax . At the upper limit of the branchial cavity , the layer of exoskeleton ...
Pagina 55
... inner or cuticular wall of the whole gastric cavity , as far as the pylorus , where it ends in certain valvular projections . The chitinous cuticle which forms the outermost layer of the integument is thus , as it were , turned in , to ...
... inner or cuticular wall of the whole gastric cavity , as far as the pylorus , where it ends in certain valvular projections . The chitinous cuticle which forms the outermost layer of the integument is thus , as it were , turned in , to ...
Pagina 55
... on each side of them , there is one of these long lateral teeth . There are two small pointed teeth , one under each of the lateral teeth , and each of these is supported by a broad plate , hairy on its inner surface ,
... on each side of them , there is one of these long lateral teeth . There are two small pointed teeth , one under each of the lateral teeth , and each of these is supported by a broad plate , hairy on its inner surface ,
Pagina 56
Thomas Henry Huxley. a broad plate , hairy on its inner surface , which enters into the lateral wall of the cardiac chamber . There are various other smaller skeletal parts , but the most im- P.P. U.C. p.c.- AC œs . 1.t. -m.t. coe ...
Thomas Henry Huxley. a broad plate , hairy on its inner surface , which enters into the lateral wall of the cardiac chamber . There are various other smaller skeletal parts , but the most im- P.P. U.C. p.c.- AC œs . 1.t. -m.t. coe ...
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