An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 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 ( 7 ) . 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 ( 7 ) . 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
... 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 THE EXOSKELETON . 19.
... 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 THE EXOSKELETON . 19.
Pagina 20
... middle , constitute the flapper of the crayfish , by the aid of which it executes its retrograde swimming movements . The small swimmerets move together with a regular swing , like paddles , and probably aid in propelling the animal ...
... middle , constitute the flapper of the crayfish , by the aid of which it executes its retrograde swimming movements . The small swimmerets move together with a regular swing , like paddles , and probably aid in propelling the animal ...
Pagina 22
... middle line of the body . They are divided into a number of joints , of which one of those near the base is longer than the rest , and strongly toothed along 22 THE NATURAL HISTORY OF THE COMMON CRAYFISH , THE NATURAL HISTORY OF THE ...
... middle line of the body . They are divided into a number of joints , of which one of those near the base is longer than the rest , and strongly toothed along 22 THE NATURAL HISTORY OF THE COMMON CRAYFISH , THE NATURAL HISTORY OF 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