An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 76
... cs , coxopoditic setæ ; cxp , coxopodite ; 7 , lamina , pl . plume , and st , stem of podobranchia ; t , tubercle on the coxopodite , to which the setæ are attached . ARTHROBRANCHIE AND PODOBRANCHIÆ . 77 second maxillipede . The first.
... cs , coxopoditic setæ ; cxp , coxopodite ; 7 , lamina , pl . plume , and st , stem of podobranchia ; t , tubercle on the coxopodite , to which the setæ are attached . ARTHROBRANCHIE AND PODOBRANCHIÆ . 77 second maxillipede . The first.
Pagina 77
... stem which con- tains two canals , one external and one internal , separated by a longitudinal partition . The stem is beset with a great number of delicate branchial filaments , so that it looks like a plume tapering from its base to ...
... stem which con- tains two canals , one external and one internal , separated by a longitudinal partition . The stem is beset with a great number of delicate branchial filaments , so that it looks like a plume tapering from its base to ...
Pagina 77
... cs , coxopoditic setæ ; cxp , coxopodite ; 7 , lamina , pl . plume , and st , stem of podobranchia ; t , tubercle on the coxopodite , to which the setæ are attached . ARTHROBRANCHIE AND PODOBRANCHIÆ . 77 second maxillipede . The first.
... cs , coxopoditic setæ ; cxp , coxopodite ; 7 , lamina , pl . plume , and st , stem of podobranchia ; t , tubercle on the coxopodite , to which the setæ are attached . ARTHROBRANCHIE AND PODOBRANCHIÆ . 77 second maxillipede . The first.
Pagina 77
... stem which con- tains two canals , one external and one internal , separated by a longitudinal partition . The stem is beset with a great number of delicate branchial filaments , so that it looks like a plume tapering from its base to ...
... stem which con- tains two canals , one external and one internal , separated by a longitudinal partition . The stem is beset with a great number of delicate branchial filaments , so that it looks like a plume tapering from its base to ...
Pagina 78
... stem ( st ) proceeds . At its upper end this stem divides into two parts , that in front , the plume ( pl ) , resembling the free end of one of the gills just described , while that behind , the lamina ( 1 ) , is a broad thin plate ...
... stem ( st ) proceeds . At its upper end this stem divides into two parts , that in front , the plume ( pl ) , resembling the free end of one of the gills just described , while that behind , the lamina ( 1 ) , is a broad thin plate ...
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