An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 19
... terminal flap , on the under side of which the vent ( fig . 3 , a ) is situated , and which is called the telson ( fig . 2 , t , t ' ) . All these are freely moveable upon one another , inasmuch as the exoskeleton which connects them is ...
... terminal flap , on the under side of which the vent ( fig . 3 , a ) is situated , and which is called the telson ( fig . 2 , t , t ' ) . All these are freely moveable upon one another , inasmuch as the exoskeleton which connects them is ...
Pagina 22
... terminal joints are called the " hand . " We shall escape confusion if we call these limbs the forceps , and restrict the name of chela to the two terminal joints . All the limbs hitherto mentioned subserve locomotion and prehension in ...
... terminal joints are called the " hand . " We shall escape confusion if we call these limbs the forceps , and restrict the name of chela to the two terminal joints . All the limbs hitherto mentioned subserve locomotion and prehension in ...
Pagina 94
... terminal segment ( dp ) turns on two hinges ( x ) , formed by the hard exoskeleton and situated at opposite points of the diameter of the base , on the penultimate segment ; and these hinges are so disposed that the last jcint can be ...
... terminal segment ( dp ) turns on two hinges ( x ) , formed by the hard exoskeleton and situated at opposite points of the diameter of the base , on the penultimate segment ; and these hinges are so disposed that the last jcint can be ...
Pagina 95
Thomas Henry Huxley. when the former contracts , the end of the terminal segment is brought towards that of the fixed claw . 66 " " A living crayfish is able to perform very varied move- ments with its pincers . When it swims backwards ...
Thomas Henry Huxley. when the former contracts , the end of the terminal segment is brought towards that of the fixed claw . 66 " " A living crayfish is able to perform very varied move- ments with its pincers . When it swims backwards ...
Pagina 96
... terminal five - pointed flapper . The rings of the abdomen are articulated together by joints ( fig . 21 , × ) situated a little below the middle of the height of the rings , at opposite ends of transverse lines , at right angles to the ...
... terminal five - pointed flapper . The rings of the abdomen are articulated together by joints ( fig . 21 , × ) situated a little below the middle of the height of the rings , at opposite ends of transverse lines , at right angles to the ...
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