pallial, a.
(ˈpælɪəl)
[ad. mod.L. palliāl-is, f. pallium: see -al1.]
a. Zool. Of or pertaining to the pallium or mantle of a mollusc (or of a brachiopod).
pallial adductor, the anterior adductor muscle of a bivalve; pallial cavity, pallial impression, pallial line, pallial lobe, pallial sac: see quots.; pallial sinus, a sinus or recess in the pallial impression of certain molluscs, being the mark of their retractile siphons.
| 1836 Todd Cycl. Anat. I. 706/1 It is in this pallial sac that the animal establishes a current of water. 1851–6 Woodward Mollusca 26 The border of the ‘mantle’ is also muscular; and the place of its attachment is marked in the shell by a line called the ‘pallial impression’. 1858 Geikie Hist. Boulder vi. 96 The inner surface of each valve is lined with a soft membranous substance, called the pallial lobe. 1872 Nicholson Palæont. 216 The ‘pallial line’ or ‘pallial impression’. 1877 Huxley Anat. Inv. Anim. i. 59 In some Mollusks (e.g. Pteropoda), the delicate lining membrane of the pallial cavity serves as the respiratory organ. 1888 Rolleston & Jackson Anim. Life 698 (Brachiopoda) A circumpallial sinus uniting the terminations of the pallial sinuses is figured by Joubin in Discina. |
b. Anat. Of or pertaining to the pallium of the brain.
| 1901 [see neopallium]. 1933 Proc. Nat. Acad. Sci. XIX. 7 Below the reptiles the entire pallial field is dominated by the olfactory system. 1965 L. B. Arey Developmental Anat. (ed. 7) 495 [The commissures] cross partly in the lamina and partly in the fused adjacent portions of the median pallial walls. |