An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 42
Pagina 23
... edge , or that which is turned towards its fellow . It is obvious that these two limbs are well adapted to crush and tear whatever comes between them , and they are , in fact , jaws or organs of manducation . At the same time , it will ...
... edge , or that which is turned towards its fellow . It is obvious that these two limbs are well adapted to crush and tear whatever comes between them , and they are , in fact , jaws or organs of manducation . At the same time , it will ...
Pagina 36
... edge of the vessel , he assailed them with promptness and energy . About a year after I had him , I perceived , as I thought , a second crayfish with him . On examination , I found it to be his old coat , which he had left in a most ...
... edge of the vessel , he assailed them with promptness and energy . About a year after I had him , I perceived , as I thought , a second crayfish with him . On examination , I found it to be his old coat , which he had left in a most ...
Pagina 59
... edge of each of which is fringed with very fine hairs . As everything which passes from the cardiac sac to the intestine must traverse this singular apparatus , only the most finely divided solid matters can escape stoppage , so long as ...
... edge of each of which is fringed with very fine hairs . As everything which passes from the cardiac sac to the intestine must traverse this singular apparatus , only the most finely divided solid matters can escape stoppage , so long as ...
Pagina 78
... edge lies for- wards , and covered with minute hooked setæ ( G ) . The gill which follows is received into the space included between the two lobes or halves of the folded lamina ( fig . 4 , p . 26 ) . Each lobe is longitudinally ...
... edge lies for- wards , and covered with minute hooked setæ ( G ) . The gill which follows is received into the space included between the two lobes or halves of the folded lamina ( fig . 4 , p . 26 ) . Each lobe is longitudinally ...
Pagina 78
... edge lies for- wards , and covered with minute hooked setæ ( G ) . The gill which follows is received into the space included between the two lobes or halves of the folded lamina ( fig . 4 , p . 26 ) . Each lobe is longitudinally ...
... edge lies for- wards , and covered with minute hooked setæ ( G ) . The gill which follows is received into the space included between the two lobes or halves of the folded lamina ( fig . 4 , p . 26 ) . Each lobe is longitudinally ...
Termeni și expresii frecvente
abdomen abdominal appendages abdominal somite acid alimentary ambulatory limbs animals antenna antennule aperture appears artery arthrobranchiæ Astacine attached basal joint base become blastomeres blood body branchiæ branchial cavity branchial chamber branchial filaments branchiostegite canal carapace cephalic cephalothorax cervical groove chitinous convex corpuscles coxopodite crayfish Crustacea cuticle cuticular division ecdysis ectoderm ectostracum edge endopodite endosternites epiblast epimeral epipodite exopodite exoskeleton external fact fibres food-yelk forceps front ganglion gastrolith gills gives rise green gland hind-gut hypoblast inner lamina lateral less lobes lobster longitudinal male mandibles maxillipede membrane metameres morphological muscles muscular Nauplius nerve nobilis nucleated cells nuclei organs outer ovum pairs plate pleura podobranchiæ portion posterior present procephalic protopodite region ridge rostrum scaphognathite segments seta setæ side somite species spines stem sternal sternum stomach structure substance surface telson tergal tergum terminal thoracic thoracic limbs thoracic somite tissue transverse wall yelk