An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 21
... opening of the green gland ; lb , labrum ; mt , metastoma or lower lip ; od , opening of the oviduct ; vd , that of the vas deferens . 1 , eye - stalk ; 2 , antennule ; 3 , antenna : 4 , mandible ; 8 , second maxillipede ; 9 , third or ...
... opening of the green gland ; lb , labrum ; mt , metastoma or lower lip ; od , opening of the oviduct ; vd , that of the vas deferens . 1 , eye - stalk ; 2 , antennule ; 3 , antenna : 4 , mandible ; 8 , second maxillipede ; 9 , third or ...
Pagina 50
... opening of the mouth . As the alimentary canal stretches from the mouth , at one end , to the vent at the other , and , at each of these limits , is continuous with the wall of the body , we may conceive the whole crayfish to be a ...
... opening of the mouth . As the alimentary canal stretches from the mouth , at one end , to the vent at the other , and , at each of these limits , is continuous with the wall of the body , we may conceive the whole crayfish to be a ...
Pagina 51
... opening , in the integument of the ventral or sternal aspect of the head . Just outside its lateral boundaries , the strong mandibles project , one on each side ( fig 3 , B ; 4 ) ; their broad crushing surfaces , which are turned ...
... opening , in the integument of the ventral or sternal aspect of the head . Just outside its lateral boundaries , the strong mandibles project , one on each side ( fig 3 , B ; 4 ) ; their broad crushing surfaces , which are turned ...
Pagina 52
... opening by which the gilet 4würze with the stomach is called the cardia , We can work places the stomach in communication * Me Haare le named the puru ; and these terms saving ben treseferred from human anatomy to that of wwwmals , the ...
... opening by which the gilet 4würze with the stomach is called the cardia , We can work places the stomach in communication * Me Haare le named the puru ; and these terms saving ben treseferred from human anatomy to that of wwwmals , the ...
Pagina 55
... opening of the mouth . As the alimentary canal stretches from the mouth , at one end , to the vent at the other , and , at each of these limits , is continuous with the wall of the body , we may conceive the whole crayfish to be a ...
... opening of the mouth . As the alimentary canal stretches from the mouth , at one end , to the vent at the other , and , at each of these limits , is continuous with the wall of the body , we may conceive the whole crayfish to be a ...
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