An Introduction to the Study of Zoology, Illustrated by the CrayfishAppleton, 1906 - 371 pagini |
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Pagina 17
... lime that it becomes dense and hard . It will be observed that the body of the crayfish is naturally marked out into several distinct regions . There bcg cg 20 XV XV XVI XVI XVII XVII XVIII THE SKELETON EXTERNAL AND CALCIFIED . 17.
... lime that it becomes dense and hard . It will be observed that the body of the crayfish is naturally marked out into several distinct regions . There bcg cg 20 XV XV XVI XVI XVII XVII XVIII THE SKELETON EXTERNAL AND CALCIFIED . 17.
Pagina 91
... nv , nerve fibre ; s , sarcolemma ; t , tendon ; 1-5 , successive dark bands answering to the darker portions , a , of each fibrilla . condition , the muscle - substance appears marked by very. THE STRUCTURE OF MUSCLE . 91.
... nv , nerve fibre ; s , sarcolemma ; t , tendon ; 1-5 , successive dark bands answering to the darker portions , a , of each fibrilla . condition , the muscle - substance appears marked by very. THE STRUCTURE OF MUSCLE . 91.
Pagina 92
Thomas Henry Huxley. condition , the muscle - substance appears marked by very regular transverse bands , which are alternately opaque and transparent ; and it is characteristic of the group of animals to which the crayfish belongs that ...
Thomas Henry Huxley. condition , the muscle - substance appears marked by very regular transverse bands , which are alternately opaque and transparent ; and it is characteristic of the group of animals to which the crayfish belongs that ...
Pagina 97
... the abdomen is straightened . or extended , for nearly half its length in the middle . line ; and the overlapped surface is smooth , convex , and marked off by a transverse groove from the rest of. THE JOINTS OF THE ABDOMEN . 97.
... the abdomen is straightened . or extended , for nearly half its length in the middle . line ; and the overlapped surface is smooth , convex , and marked off by a transverse groove from the rest of. THE JOINTS OF THE ABDOMEN . 97.
Pagina 98
Thomas Henry Huxley. marked off by a transverse groove from the rest of the tergum as an articular facet . The front edge of the articular facet is continued into a sheet of flexible cuti- cula , which turns back , and passes as a loose ...
Thomas Henry Huxley. marked off by a transverse groove from the rest of the tergum as an articular facet . The front edge of the articular facet is continued into a sheet of flexible cuti- cula , which turns back , and passes as a loose ...
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