An Introduction to the study of zoology, illustrated by the crayfishD. Appleton, 1901 - 371 pagini |
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Pagina 6
... lateral lobe of the tail - fin , or sixth abdominal appendage ; XV , the first ; and xx , the last abdominal somite . In this and in succeeding figures the numbers of the somites are given in Roman , those of the appendages in ordinary ...
... lateral lobe of the tail - fin , or sixth abdominal appendage ; XV , the first ; and xx , the last abdominal somite . In this and in succeeding figures the numbers of the somites are given in Roman , those of the appendages in ordinary ...
Pagina 7
... lateral lobe of the tail - fin , or sixth abdominal appendage ; XV , the first ; and xx , the last abdominal somite . In this and in succeeding figures the numbers of the somites are given in Roman , those of the appendages in ordinary ...
... lateral lobe of the tail - fin , or sixth abdominal appendage ; XV , the first ; and xx , the last abdominal somite . In this and in succeeding figures the numbers of the somites are given in Roman , those of the appendages in ordinary ...
Pagina 7
... lateral lobe of the tail - fin , or sixth abdominal appendage ; XV , the first ; and xx , the last abdominal somite . In this and in succeeding figures the numbers of the somites are given in Roman , those of the appendages in ordinary ...
... lateral lobe of the tail - fin , or sixth abdominal appendage ; XV , the first ; and xx , the last abdominal somite . In this and in succeeding figures the numbers of the somites are given in Roman , those of the appendages in ordinary ...
Pagina 18
... rostrum ; t , t ' , the two divisions of the telson ; 1 , eye - stalks ; 2 , antennules ; 3 , antennæ ; 20 , lateral lobes of tail - fin ; XV - XX , somites of the abdomen . THE EXOSKELETON . 19 is a firm and solid front.
... rostrum ; t , t ' , the two divisions of the telson ; 1 , eye - stalks ; 2 , antennules ; 3 , antennæ ; 20 , lateral lobes of tail - fin ; XV - XX , somites of the abdomen . THE EXOSKELETON . 19 is a firm and solid front.
Pagina 29
... lateral tooth of stomach : m , mouth ; mg , mid - gut ; mt , median tooth ; œ , œsophagus ; pc , pro- cephalic process ; pg , posterior gastric muscle ; ps , pyloric portion of stomach ; r , annular ridge , marking the commencement of ...
... lateral tooth of stomach : m , mouth ; mg , mid - gut ; mt , median tooth ; œ , œsophagus ; pc , pro- cephalic process ; pg , posterior gastric muscle ; ps , pyloric portion of stomach ; r , annular ridge , marking the commencement of ...
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