. Cephalopoda. Cephalopoda. Os\ Km Nd Ni Sch Sw Mg Bs Gl â I Ts I Si. Org' / Gd Tr Tk Mt Ni : Gi Tb Ed Hz FIGURE 9. Diagrammatic median section through N autilus (a) and Sepia (b) for a comparison of the organization of Tetrabranchiata and Dibranchiata: Lm â lip membranes (outer and inner lip); Ok â upper jaw; Zg â tongue; Kk â hood; Nk - collar; Ml - dorsal lobe of the mantle; Sch - shell; Si - siphuncle; Sw - septa; Gd - poison gland (opening); Gg- cerebral ganglion; Pg â pedal ganglion; Vg â pleuro- visceral ganglion; Vd â esophagus; Vc â vena cava; Ed â intestine; Mg â stomach; Bs â caecum
. Cephalopoda. Cephalopoda. Os\ Km Nd Ni Sch Sw Mg Bs Gl â I Ts I Si. Org' / Gd Tr Tk Mt Ni : Gi Tb Ed Hz FIGURE 9. Diagrammatic median section through N autilus (a) and Sepia (b) for a comparison of the organization of Tetrabranchiata and Dibranchiata: Lm â lip membranes (outer and inner lip); Ok â upper jaw; Zg â tongue; Kk â hood; Nk - collar; Ml - dorsal lobe of the mantle; Sch - shell; Si - siphuncle; Sw - septa; Gd - poison gland (opening); Gg- cerebral ganglion; Pg â pedal ganglion; Vg â pleuro- visceral ganglion; Vd â esophagus; Vc â vena cava; Ed â intestine; Mg â stomach; Bs â caecum; Ov â ovary; Lh â body cavity (coelom); Gs â genital septum; Ps â peri- cardial septum; Hz - heart; Ni - kidneys; Km - gills; Mt - mantle; Int - sheaths of the inner series of arms; Ext â sheaths of the outer series of arms; Ci â cirri; Ar â arms; Tk - tentacle club; Bt - buccal funnel; Tb - ink sac; Ts - testis; Rs - rostrum; Os - osphradium; Nd â nidamental gland; Org â subradular organ; Gl â gastrogenital ligament. The coiling of the shell leaves a small empty porus in the axis of the coil between the umbilicus of one side and the other. The central part of this porus persists even when the openings are later closed. The Nautilus shell does not contain a typical central embryonic chamber. Since such a chamber has not been found in larger specimens of the straight-shelled fossil nautilids, its absence has long been regarded as a specific character 55. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Naef, Adolf. Jerusalem : Israel Program for Scientific Translations
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectcephalopoda
