(The figures are not to scale)
Fig. 17: Mcgalocranchia pardus (Berry). Fig. 18: Diagrammatical representation of major points of cephalopod anatomy. (A, anus; B, beaks; C, crop; CT, ctenidium; F, funnel; G, gonad; H, hepato-pancreas; IS, ink sac; M, mantle; MC., mantle cavity; R, radula; S, stomach.) Fig. 19: Female genital duct of Octopus zealandicus (Benham) after Benham. Fig. 20: Female genital system of Octopus maorum (Hutton). O. oviduct; OG, oviducal gland; OS, ovarian sac. Fig. 21: Female genital duct of Octopus adamsi Benham. After Benham. Fig. 22: Histioteuthis cookiana Dell. Fig. 23: Shell of Argonauta nodosa Solander. Fig. 24: Female animal of Argonauta nodosa Solander. Fig. 25: A-C, Diagrammatic representation of inhalent and exhalent cycle through mantle cavity showing relationship of free mantle edge, funnel and funnel valve.