The Crayfish: An Introduction to the Study of ZoologyK. Paul, 1896 - 371 páginas |
Términos y frases comunes
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 branchiostegite carapace cardiac cavity cephalothorax cervical groove chelate chitinous convex corpuscles coxopodite cray Crustacea cuticle cuticular division ecdysis Écrevisses edge Edition endopodite English crayfish epiblast epipodite exopodite exoskeleton eyestalk fact female filaments fluviatilis.-A forceps front ganglia ganglion gastrolith genus gills give rise green gland hind-gut hinder hypoblast inner integument lateral leptodactylus less lobster longitudinal male mid-gut morphological muscle nerve fibres nobilis noble crayfish nucleated cells nuclei organs ossicle outer pairs plate pleura podobranchiæ portion posterior prawns present pyloric 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
Pasajes populares
Página vi - Whoever will follow these pages, crayfish in hand, and will try to verify for himself the statements which they contain, will find himself brought face to face with all the great zoological questions which excite so lively an interest at the present day.
Página 89 - ... proved that consciousness is wholly unnecessary to the carrying out of many of those combined movements, by which the body is adjusted to varying external conditions.
Página 85 - However changeful in the contour of its crest, this wave has been visible, approximately in the same place and with the same general form, for centuries past. Seen from a mile off, it would appear to be a stationary hillock of water. Viewed closely, it is a typical expression of the conflicting impulses generated by a swift rush of material particles. " Now, with all our appliances, we cannot get within a good many miles, so to speak, of the living organism.