An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 4
... Middle Ages , Rondoletius , Aldrovandus , and their contemporaries and successors . But the conscious at- tempt to construct a complete science of Biology hardly dates further back than Treviranus and Lamarck , at the beginning of this ...
... Middle Ages , Rondoletius , Aldrovandus , and their contemporaries and successors . But the conscious at- tempt to construct a complete science of Biology hardly dates further back than Treviranus and Lamarck , at the beginning of this ...
Pagina 7
... middle line ( r ) . On each side of this is an eye , mounted on a movable stalk ( 1 ) , which can be turned in any direction : behind the eyes follow two pairs of feelers ; in one of these , the feeler ends in two , short , jointed ...
... middle line ( r ) . On each side of this is an eye , mounted on a movable stalk ( 1 ) , which can be turned in any direction : behind the eyes follow two pairs of feelers ; in one of these , the feeler ends in two , short , jointed ...
Pagina 7
... middle line ( r ) . On each side of this is an eye , mounted on a movable stalk ( 1 ) , which can be turned in any direction : behind the eyes follow two pairs of feelers ; in one of these , the feeler ends in two , short , jointed ...
... middle line ( r ) . On each side of this is an eye , mounted on a movable stalk ( 1 ) , which can be turned in any direction : behind the eyes follow two pairs of feelers ; in one of these , the feeler ends in two , short , jointed ...
Pagina 7
... middle line ( r ) . On each side of this is an eye , mounted on a movable stalk ( 1 ) , which can be turned in any direction : behind the eyes follow two pairs of feelers ; in one of these , the feeler ends in two , short , jointed ...
... middle line ( r ) . On each side of this is an eye , mounted on a movable stalk ( 1 ) , which can be turned in any direction : behind the eyes follow two pairs of feelers ; in one of these , the feeler ends in two , short , jointed ...
Pagina 19
... groove is observed about the middle of it , the ends of which run down on the sides and then turn forwards ( figs . 1 and 2 , cg ) . This is called the cervical groove , and it marks off the region of the head , in front , from.
... groove is observed about the middle of it , the ends of which run down on the sides and then turn forwards ( figs . 1 and 2 , cg ) . This is called the cervical groove , and it marks off the region of the head , in front , from.
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