An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 5
... ; but the gills and the abdominal appendages present differences ; and the last thoracic somite is united with the rest in the lobster . ( See Chap . V. ) 66 cray- general hue may be red or blue . COMMON KNOWLEDGE OF THE CRAYFISH .
... ; but the gills and the abdominal appendages present differences ; and the last thoracic somite is united with the rest in the lobster . ( See Chap . V. ) 66 cray- general hue may be red or blue . COMMON KNOWLEDGE OF THE CRAYFISH .
Pagina 15
... rest , he shall find what he wants to read under the head of Astacus fluviatilis . But granting the expediency of a technical name for the Crayfish , why should that name be double ? The reply is still , practical convenience . If there ...
... rest , he shall find what he wants to read under the head of Astacus fluviatilis . But granting the expediency of a technical name for the Crayfish , why should that name be double ? The reply is still , practical convenience . If there ...
Pagina 20
... rest , but can be moved backwards and forwards through a small space ( fig . 3 , B ; xiv ) . Attached to the sternal side of every ring of the abdomen of the female there is a pair of limbs , called swimmerets . In the five anterior ...
... rest , but can be moved backwards and forwards through a small space ( fig . 3 , B ; xiv ) . Attached to the sternal side of every ring of the abdomen of the female there is a pair of limbs , called swimmerets . In the five anterior ...
Pagina 22
... 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 COMMON CRAYFISH.
... 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 COMMON CRAYFISH.
Pagina 23
Thomas Henry Huxley. is longer than the rest , and strongly toothed along the inner edge , or that which is turned towards its fellow . It is obvious that these two limbs are well adapted to crush and tear whatever comes between them ...
Thomas Henry Huxley. is longer than the rest , and strongly toothed along the inner edge , or that which is turned towards its fellow . It is obvious that these two limbs are well adapted to crush and tear whatever comes between them ...
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