Fig. 4.—Philine exigua n.sp. A. A horizontal-longitudinal section through the pallial gland showing the pallial sense organ, the opening of the duct to the mantle cavity and the dorsal region of the hypobranchial gland. B. A transverse section through the posterior region of the visceral hump showing the hypobranchial gland, the ciliary raphe and the folded roof of the mantle cavity. C. A transverse section immediately behind the mouth showing the dorsal and ventral oral glands, the anterior sensory ganglia and the Hancock's organs. D. A longitudinal section through the visceral hump showing the shell cavity with a remnant of the shell membrane, the pallial gland with its associated sense organ and the arrangement of the nidamental gland mass. Cr., ciliated raphe; D.o.gld., dorsal oral-glands; G.ap., genital aperture; H. o., Hancock's organs; H.gld., hypobranchial gland; K., kidney; Lt.g., lateral groove; M.c., mantle cavity; M.r., mantle roof; o.t., oral tube; P.dct., duct of pallial gland; P.gld., pallial gland; P.sn.o., pallial sense organ; Sb.gld., sub-epidermal glands; Sh.c., shell cavity; Sh.m., shell membrane; V.o.gld., ventral oral glands.

Transactions of the Royal Society of New Zealand : Biological Sciences, Volume 11, Issue 12, 15 October 1969, Page 184

Fig. 4. — Philine exigua n.sp. A. A horizontal-longitudinal section through the pallial gland showing the pallial sense organ, the opening of the duct to the mantle cavity and the dorsal region of the hypobranchial gland. B. A transverse section through the posterior region of the visceral hump showing the hypobranchial gland, the ciliary raphe and the folded roof of the mantle cavity. C. A transverse section immediately behind the mouth showing the dorsal and

ventral oral glands, the anterior sensory ganglia and the Hancock's organs. D. A longitudinal section through the visceral hump showing the shell cavity with a remnant of the shell membrane, the pallial gland with its associated sense organ and the arrangement of the nidamental gland mass. Cr., ciliated raphe; D.0.g1d., dorsal oral-glands; G.ap., genital aperture; H. 0., Hancock's organs; H.gld., hypobranchial gland; K., kidney; Lt.g., lateral groove; M.c., mantle cavity; M.r., mantle roof; 0.t., oral tube; P.dct., duct of pallial gland; P.gld., pallial gland; P.sn.o., pallial sense organ; Sb.gld., sub-epidermal glands; Sh.c., shell cavity; Sh.m., shell membrane; V.0.g1d., ventral oral glands.