An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 7
... forwards , these long feelers con- tinually explore a considerable area around the body of the crayfish . If a number of crayfishes , of about the same size , are compared together , it will easily be seen that they fall into two sets ...
... forwards , these long feelers con- tinually explore a considerable area around the body of the crayfish . If a number of crayfishes , of about the same size , are compared together , it will easily be seen that they fall into two sets ...
Pagina 8
... forwards between the hinder legs , on the under side of the body ( fig . 3 , A ; 15 , 16 ) . In the female , there are mere soft filaments in the place of the first pair of styles ( fig . 3 , B ; 15 ) . Crayfishes do not inhabit every ...
... forwards between the hinder legs , on the under side of the body ( fig . 3 , A ; 15 , 16 ) . In the female , there are mere soft filaments in the place of the first pair of styles ( fig . 3 , B ; 15 ) . Crayfishes do not inhabit every ...
Pagina 19
... the 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.
... the 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
... 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 rings , these are small and slender ( fig ...
... 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 rings , these are small and slender ( fig ...
Pagina 22
... forwards , parallel with one another , and with 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 ...
... forwards , parallel with one another , and with 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 ...
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