An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 146
... spines , of which two , at the outer end of the series , are larger than the rest . The second somite is longer than the first ( fig . 1 ) ; it has very broad pleura , while those of the first somite are small and hidden by the ...
... spines , of which two , at the outer end of the series , are larger than the rest . The second somite is longer than the first ( fig . 1 ) ; it has very broad pleura , while those of the first somite are small and hidden by the ...
Pagina 157
... spines , which descend , in front of the ophthalmic somite , towards the conical tubercle mentioned above : it thus gives rise to an imperfect partition between the orbits . FIG . 41. - Astacus fluviatilis . - The rostrum , seen from ...
... spines , which descend , in front of the ophthalmic somite , towards the conical tubercle mentioned above : it thus gives rise to an imperfect partition between the orbits . FIG . 41. - Astacus fluviatilis . - The rostrum , seen from ...
Pagina 197
... spines . As these processes , though so similar to hairs in general appearance , are essentially different from the structures known as hairs in the higher animals , it is better to speak of them as setæ . These setæ ( fig . 56 , F ) ...
... spines . As these processes , though so similar to hairs in general appearance , are essentially different from the structures known as hairs in the higher animals , it is better to speak of them as setæ . These setæ ( fig . 56 , F ) ...
Pagina 232
... spines . The tergal surface of the rostrum is flattened and slightly excavated from side to side , except in its an ... spine , which descends between the eye - stalks ( fig . 41 ) . The raised and granulated lateral margins of the ...
... spines . The tergal surface of the rostrum is flattened and slightly excavated from side to side , except in its an ... spine , which descends between the eye - stalks ( fig . 41 ) . The raised and granulated lateral margins of the ...
Pagina 233
Thomas Henry Huxley. spine . The elevation itself may be distinguished as the post - orbital ridge . The flattened ... spines ; c , branchio - cardiac grooves inclosing the areola . posterior end of the ridge passes into a somewhat ...
Thomas Henry Huxley. spine . The elevation itself may be distinguished as the post - orbital ridge . The flattened ... spines ; c , branchio - cardiac grooves inclosing the areola . posterior end of the ridge passes into a somewhat ...
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