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Vol. 36(2), 2001
Figs 307-313 Modulus modulus anatomy: 307) bucca! mass, ventral vicw; 308) same, dorsa) view; 309) buceal mass and csophagus opened longitudinally by means of a section in their left region; 310) odontophore, ventral view, first iayer of muscles and membranes extractcd; 311) same, dorsa) view;312) same, ventra) view, most of muscles dcflected to show innerstructurcs.cartilages, horizon-tal mnscle, m4 and subradular membranę partially sectioned; 313) same before section of structures. Scales = 0.5 mm; g5 = annex third esophageal pouch resuHing from a deep furrow of large csophageal fold in its middle region.
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