An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 38
... joint with the next . The other limbs also readily part at the joints ; and it is very common to meet with crayfish which have undergone such mutilation . But the injury thus inflicted is not permanent , as these animals possess the ...
... joint with the next . The other limbs also readily part at the joints ; and it is very common to meet with crayfish which have undergone such mutilation . But the injury thus inflicted is not permanent , as these animals possess the ...
Pagina 39
... joint of the hindermost pair of legs of the male a small aperture is to be seen ( fig . 3 , A ; vd ) . In these , the ducts of the apparatus in which the fecundating substance is formed terminate . The fecundating material itself is a ...
... joint of the hindermost pair of legs of the male a small aperture is to be seen ( fig . 3 , A ; vd ) . In these , the ducts of the apparatus in which the fecundating substance is formed terminate . The fecundating material itself is a ...
Pagina 54
... joint with the end of the handle of the crossbow , there is another solid bar , which ascends obliquely forwards in the back wall of the pouch ( pp ) . The end which is articulated with the handle of the cross- bow is produced into a ...
... joint with the end of the handle of the crossbow , there is another solid bar , which ascends obliquely forwards in the back wall of the pouch ( pp ) . The end which is articulated with the handle of the cross- bow is produced into a ...
Pagina 55
... joint , in such a manner that the handle of the one makes an acute angle with the handle of the other ; while the middle of each bow is united with the middle of the other by the bent arm formed by the two handles . But , in addition to ...
... joint , in such a manner that the handle of the one makes an acute angle with the handle of the other ; while the middle of each bow is united with the middle of the other by the bent arm formed by the two handles . But , in addition to ...
Pagina 55
... joint with the end of the handle of the crossbow , there is another solid bar , which ascends obliquely forwards in the back wall of the pouch ( pp ) . The end which is articulated with the handle of the cross- bow is produced into a ...
... joint with the end of the handle of the crossbow , there is another solid bar , which ascends obliquely forwards in the back wall of the pouch ( pp ) . The end which is articulated with the handle of the cross- bow is produced into a ...
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