An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 29
... ridge , marking the commencement of the hind - gut . In summer , there are commonly to be found at the sides of the stomach two lenticular calcareous masses , which are known as " crabs ' - eyes , " or gastroliths , and were , in old ...
... ridge , marking the commencement of the hind - gut . In summer , there are commonly to be found at the sides of the stomach two lenticular calcareous masses , which are known as " crabs ' - eyes , " or gastroliths , and were , in old ...
Pagina 55
... ridges , which diminish in size from before backwards , and constitute a crushing surface almost like that of the grinder of an elephant . Thus , when the front part of the cardiac cavity is cut away , not only are the median teeth ...
... ridges , which diminish in size from before backwards , and constitute a crushing surface almost like that of the grinder of an elephant . Thus , when the front part of the cardiac cavity is cut away , not only are the median teeth ...
Pagina 59
... ridge in the middle , while , at the sides , it adapts itself to the shape of the two cushion- shaped surfaces ; the ... ridges , the edge of each of which is fringed with very fine hairs . As everything which passes from the cardiac sac ...
... ridge in the middle , while , at the sides , it adapts itself to the shape of the two cushion- shaped surfaces ; the ... ridges , the edge of each of which is fringed with very fine hairs . As everything which passes from the cardiac sac ...
Pagina 61
... ridge , corresponding with a fold of the wall of the intestine , takes its rise , and passes , with a slight spiral twist , to its extremity ( hg ) . Each of these ridges is beset with small papillæ , and the chitinous lining is ...
... ridge , corresponding with a fold of the wall of the intestine , takes its rise , and passes , with a slight spiral twist , to its extremity ( hg ) . Each of these ridges is beset with small papillæ , and the chitinous lining is ...
Pagina 65
... pterocardiac ossicle ; ps , pyloric portion of stomach , the line pointing to the pyloric ossicle ; r , ridge separating mid - gut from hind - gut ; zc , zygocardiac ossicle , three lobes , one anterior , one lateral , and.
... pterocardiac ossicle ; ps , pyloric portion of stomach , the line pointing to the pyloric ossicle ; r , ridge separating mid - gut from hind - gut ; zc , zygocardiac ossicle , three lobes , one anterior , one lateral , and.
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