An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 5
... limbs . In rare cases , their * If crayfish are not to be had , a lobster will be found to answer to the description of the former , in almost all points ; but the gills and the abdominal appendages present differences ; and the last ...
... limbs . In rare cases , their * If crayfish are not to be had , a lobster will be found to answer to the description of the former , in almost all points ; but the gills and the abdominal appendages present differences ; and the last ...
Pagina 7
... limbs of a much more massive character , each of which ends in two claws disposed in such a manner as to constitute a powerful pincer ( fig . 1 ; 10 ) . These claws are the chief weapons of offence and defence of the crayfish , and ...
... limbs of a much more massive character , each of which ends in two claws disposed in such a manner as to constitute a powerful pincer ( fig . 1 ; 10 ) . These claws are the chief weapons of offence and defence of the crayfish , and ...
Pagina 20
... limbs , called swimmerets . In the five anterior rings , these are small and slender ( fig . 3 , B ; 15 , 19 ) ; but those of the sixth ring are very large , and each ends in two broad plates ( 20 ) . These two plates on each side ...
... limbs , called swimmerets . In the five anterior rings , these are small and slender ( fig . 3 , B ; 15 , 19 ) ; but those of the sixth ring are very large , and each ends in two broad plates ( 20 ) . These two plates on each side ...
Pagina 22
... limbs ( 10 ) , which are chelate , like those which im- mediately follow them , but vastly larger . They often ... limbs the forceps , and restrict the name of chela to the two terminal joints . All the limbs hitherto mentioned subserve ...
... limbs ( 10 ) , which are chelate , like those which im- mediately follow them , but vastly larger . They often ... limbs the forceps , and restrict the name of chela to the two terminal joints . All the limbs hitherto mentioned subserve ...
Pagina 23
... limbs are well adapted to crush and tear whatever comes between them , and they are , in fact , jaws or organs of manducation . At the same time , it will be noticed that they retain a curiously close general resemblance to the hinder ...
... limbs are well adapted to crush and tear whatever comes between them , and they are , in fact , jaws or organs of manducation . At the same time , it will be noticed that they retain a curiously close general resemblance to the hinder ...
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