An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 25
... cavity is bounded , on the 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 ...
... cavity is bounded , on the 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 ...
Pagina 29
... in old times , valued in medicine as sovereign remedies for all sorts of disorders . These bodies ( fig . 7 ) are smooth and flattened , or concave , on the side which is turned towards the cavity of the stomach ; while the opposite side.
... in old times , valued in medicine as sovereign remedies for all sorts of disorders . These bodies ( fig . 7 ) are smooth and flattened , or concave , on the side which is turned towards the cavity of the stomach ; while the opposite side.
Pagina 30
Thomas Henry Huxley. the cavity of the stomach ; while the opposite side , being convex and rough with irregular prominences , is some- thing like a " brain - stone " coral . Moreover , when the stomach is laid open , three large D A C B ...
Thomas Henry Huxley. the cavity of the stomach ; while the opposite side , being convex and rough with irregular prominences , is some- thing like a " brain - stone " coral . Moreover , when the stomach is laid open , three large D A C B ...
Pagina 38
... cavity of the limb is less patent , and its sides more readily fall together ; and , as we have seen , the pincers are usually cast off at their narrowest point . When such amputation has taken place , a crust , probably formed of ...
... cavity of the limb is less patent , and its sides more readily fall together ; and , as we have seen , the pincers are usually cast off at their narrowest point . When such amputation has taken place , a crust , probably formed of ...
Pagina 50
... cavity of which is everywhere closed , though it is traversed by a tube , open at each end ( fig . 6 ) . The shut cavity between the tube and the walls of the cylinder may be termed the perivisceral cavity ; and it is so much filled up ...
... cavity of which is everywhere closed , though it is traversed by a tube , open at each end ( fig . 6 ) . The shut cavity between the tube and the walls of the cylinder may be termed the perivisceral cavity ; and it is so much filled up ...
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