An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 46
... represent what we know of its Distribu- tion or Chorology . There remains a fourth problem , which can hardly be regarded as seriously under dis- cussion , so long as knowledge has advanced no further than the Natural History stage ...
... represent what we know of its Distribu- tion or Chorology . There remains a fourth problem , which can hardly be regarded as seriously under dis- cussion , so long as knowledge has advanced no further than the Natural History stage ...
Pagina 71
... represent the veins of the higher animals . When the carapace is removed from the middle of the region which lies behind the cervical groove , that is , when the dorsal or tergal wall of the thorax is taken away , a spacious chamber is ...
... represent the veins of the higher animals . When the carapace is removed from the middle of the region which lies behind the cervical groove , that is , when the dorsal or tergal wall of the thorax is taken away , a spacious chamber is ...
Pagina 124
... represent the true course of the rays , indicated by dotted lines , which fall obliquely on any cornea of a crayfish's eye . Such rays will be more or less bent towards the axis of the visual rod of that cornea ; but whether they reach ...
... represent the true course of the rays , indicated by dotted lines , which fall obliquely on any cornea of a crayfish's eye . Such rays will be more or less bent towards the axis of the visual rod of that cornea ; but whether they reach ...
Pagina 146
... represent the endopodite of the other ap- pendages . In the male , the appendages of the first and second somites of the abdomen are not only of relatively large ze , but they are widely different from the rest , those of the first ...
... represent the endopodite of the other ap- pendages . In the male , the appendages of the first and second somites of the abdomen are not only of relatively large ze , but they are widely different from the rest , those of the first ...
Pagina 147
... represent the proto- podite , together with the basal part and the inner pro- longation of the endopodite of the preceding appendage . The terminal half of the appendage is really a broad plate , slightly bifid at the summit , but the ...
... represent the proto- podite , together with the basal part and the inner pro- longation of the endopodite of the preceding appendage . The terminal half of the appendage is really a broad plate , slightly bifid at the summit , but 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