An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 84
Pagina 1
... matter , from the processes by which we discriminate between fact and fancy in ordinary life . - But any one who looks into the matter attentively will soon perceive that there is no solid foundation for the belief that the realm of ...
... matter , from the processes by which we discriminate between fact and fancy in ordinary life . - But any one who looks into the matter attentively will soon perceive that there is no solid foundation for the belief that the realm of ...
Pagina 5
... matter of common information that a number of our streams and rivulets harbour small animals , rarely more than three or four inches long , which are very similar to little lobsters , except that they are usually of a dull , greenish or ...
... matter of common information that a number of our streams and rivulets harbour small animals , rarely more than three or four inches long , which are very similar to little lobsters , except that they are usually of a dull , greenish or ...
Pagina 8
... matter to the waters which flow over it , crayfishes do not occur . They are intolerant of great heat and of much sunshine ; they are therefore most active towards the evening , while they shelter themselves under the shade of stones ...
... matter to the waters which flow over it , crayfishes do not occur . They are intolerant of great heat and of much sunshine ; they are therefore most active towards the evening , while they shelter themselves under the shade of stones ...
Pagina 9
... , shells and all ; the cast coats of other crayfish are turned to account as supplies of needful calcareous matter ; and the unprotected or weakly member of the family is not spared . Crayfishes , in fact , are guilty.
... , shells and all ; the cast coats of other crayfish are turned to account as supplies of needful calcareous matter ; and the unprotected or weakly member of the family is not spared . Crayfishes , in fact , are guilty.
Pagina 17
... matter , so much impregnated with carbonate and phosphate of 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 we put the Christian name ...
... matter , so much impregnated with carbonate and phosphate of 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 we put the Christian name ...
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