annulosan (anulosan)

[ IMG:content-0793.png:[blocks in formation] a, sporangia of a fern, showing the annulus closed and open; 8, detached annulus of a mo ( Bryum caspititium); c, a fungus ( Aga ricus ) with annulus, a. ( a and b greatly magnified.) (c) In fungi, the slender membrane surrounding the stem in some agarics after the cap has expanded.-4. In zool.: (a) A thin chitinous ring which encircles the mantle in the Tetra branch i at a, connecting chitinous patches of the mantle into which the shell-muscles are inserted. (b) In entom., a narrow encircling band, generally of color; sometimes a raised ring. -5. In astron., the ring of light seen about the edge of the moon in an annular eclipse of the sun. See annular eclipse, under annular. The sun [at the time of an annular eclipse] will present the appearance of an annulus or ring of light around the Newcomb and Holden , Astron., p. 173. moon. Annulus abdominal is or inguinal is, in an at., the abdominal ring. See abdominal. - Annulus et baculum, the ring and pastoral staff, emblems of episcopal authority, the delivery of which by a prince or by the pope was the ancient mode of investiture with bishoprics. - Annulus ciliaris, the ciliary muscle. - Annulus crural is intern us (internal crural ring), in an at., the weak spot below Poupart's ligament, between the femoral ve els and Gimbernat's ligament, through which a femoral hernia forces its way. Annulus duplex, in Rom, antiq., a double ring given to a soldier for bravery. Double gold rings of the Roman epoch exist in collections, some of them engraved with tokens of victory. - Annulus oval is, in human an at., the raised rim or margin of the fo a oval is of the heart. Annulus piscator is, eccles., same as fisherman's ring (which see, under fisherman ). - Annulus ten dinos us, in an at., the fibrous ring around the edge of the tym panum. Annulus tympanic us, in an at., the ring-like o ification from which is formed the tympanic portion of the temporal bone. annumeratet (a-nū me-rāt), v. t. [ a no cathartic