The Annals and Magazine of Natural History: Zoology, Botany, and Geology

abactinal abdomen acerate actinal ambulacral angle antennæ aperture apex apical appear avicularium Barents Sea basal base blackish border branches brown Busk calcareous cell centre chalk character colour costal Crustacea curved Darjiling Darjiling Lidderdale dermal described diameter discal disk dorsal Echini Echinoderms elytra Expanse of wings external flesh-spicule flint Flustra fossil fringe genera genus Graptolite grey greyish Gulf of Manaar Heteropora Hincks inner Lapw larvæ latter layer Lidderdale Llandeilo lower margin Membranipora millims Naticopsis nodules Novaya Zemlya oblique Ordovician orifice outer pale papillæ pedicellaria peristome Polyzoa poriferous zone portion posterior present primaries Prof prothorax rounded Sars secondaries shaft shell side siliceous Silurian slightly smooth species specimens spicules spines sponge spots stellate stripe Stromatopora structure surface tabulæ tibiæ transverse tubercles tubes Type B. M. upper whitish wings 1 inch Zoacia zone-spicule