An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 58
... narrow , on account of the constriction of the walls of the stomach at this point , is bounded at the sides by two folds ; while , from below , a conical tongue- shaped process ( figs . 6 , 10 , and 11 , cpv ) , the surface of which is ...
... narrow , on account of the constriction of the walls of the stomach at this point , is bounded at the sides by two folds ; while , from below , a conical tongue- shaped process ( figs . 6 , 10 , and 11 , cpv ) , the surface of which is ...
Pagina 59
... narrow three - rayed fissure . In transverse section , the vertical ray of this fissure is straight , while the two lateral ones are concave upwards ( fig . 9 , E ) . The cushions of the side walls are covered with short close - set ...
... narrow three - rayed fissure . In transverse section , the vertical ray of this fissure is straight , while the two lateral ones are concave upwards ( fig . 9 , E ) . The cushions of the side walls are covered with short close - set ...
Pagina 78
... narrow stem ( st ) proceeds . At its upper end this stem divides into two parts , that in front , the plume ( pl ) , resembling the free end of one of the gills just described , while that behind , the lamina ( 1 ) , is a broad thin ...
... narrow stem ( st ) proceeds . At its upper end this stem divides into two parts , that in front , the plume ( pl ) , resembling the free end of one of the gills just described , while that behind , the lamina ( 1 ) , is a broad thin ...
Pagina 96
... on each side , which overlaps the bases of the abdominal appendages , and is known as the pleuron ( fig . 36 , pl . XIX ) . The sterna are all very narrow , and are connected 96 THE PHYSIOLOGY OF THE COMMON CRAYFISH .
... on each side , which overlaps the bases of the abdominal appendages , and is known as the pleuron ( fig . 36 , pl . XIX ) . The sterna are all very narrow , and are connected 96 THE PHYSIOLOGY OF THE COMMON CRAYFISH .
Pagina 97
Thomas Henry Huxley. The sterna are all very narrow , and are connected together by wide spaces of flexible exoskeleton . When the abdomen is made straight , it will be found that these intersternal membranes are stretched as far as they ...
Thomas Henry Huxley. The sterna are all very narrow , and are connected together by wide spaces of flexible exoskeleton . When the abdomen is made straight , it will be found that these intersternal membranes are stretched as far as they ...
Alte ediții - Afișează-le pe toate
An Introduction to the Study of Zoology, Illustrated by the Crayfish Thomas Henry Huxley Vizualizare completă - 1895 |
An Introduction to the Study of Zoology, Illustrated by the Crayfish Thomas Henry Huxley Vizualizare completă - 1902 |
Termeni și expresii frecvente
abdomen abdominal appendages abdominal somites ambulatory limbs Amurland animals antenna antennule aperture appears artery arthrobranchiæ Astacine Astacus fluviatilis Astacus torrentium attached basal joint blastomeres blood body branchiæ branchial cavity carapace cardiac cavity cephalothorax cervical groove chelate chitinous corpuscles coxopodite cray Crustacea cuticle cuticular division ecdysis Écrevisses edge endopodite English crayfish epiblast epipodite exopodite exoskeleton eye-stalk fact female filaments fluviatilis.-A forceps front ganglia ganglion gastrolith gills give rise green gland hind-gut hinder hypoblast Illustrations inner integument lateral leptodactylus less lobster longitudinal male mid-gut middle modified morphological muscle muscular nerve fibres nobilis noble crayfish nucleated cells nuclei organs ossicle outer pairs plate pleura podobranchiæ portion posterior prawns present region ridge rostrum segments septal lines setæ side somite species spermatozoa spines sternal sternum stomach structure substance surface swimmerets telson tergal tergum terminal thoracic thoracic limbs thoracic somite tissue transverse wall yelk zone