. The Intellectual observer. ts, 65 ; Chemical, 381; Ento- ;mological, 63 ; Ethnological, 61; Geographical, 62, 382, 462; Geolo-gical, 62, 459 ; Geological of Glasgow, 459; Linmcan 143 ILLUSTEAIIONS. -t—<? ILLUSTRATIONS IN COLOURS. PAGE Ephemera, the May-Ply 147 Roman Samian Ware 227 Mimetic Analogy ...Celestial Chemistry PAGE 307387 TINTED PLATES. Pentacrinus Caput-Medusce 1 Resting Spores of Pungi 32 Swan Mussel and its Anatomy ... 67 Anglo-Saxon Pottery 122 Anatomy of the May-Ply 154 Vegetable Mortars 254 Parasites of the Cockroach 338 Great Water-Beetle 422 ENGRAVINGS ON WOOD. Brownings


. The Intellectual observer. ts, 65 ; Chemical, 381; Ento- ;mological, 63 ; Ethnological, 61; Geographical, 62, 382, 462; Geolo-gical, 62, 459 ; Geological of Glasgow, 459; Linmcan 143 ILLUSTEAIIONS. -t—<? ILLUSTRATIONS IN COLOURS. PAGE Ephemera, the May-Ply 147 Roman Samian Ware 227 Mimetic Analogy ...Celestial Chemistry PAGE 307387 TINTED PLATES. Pentacrinus Caput-Medusce 1 Resting Spores of Pungi 32 Swan Mussel and its Anatomy ... 67 Anglo-Saxon Pottery 122 Anatomy of the May-Ply 154 Vegetable Mortars 254 Parasites of the Cockroach 338 Great Water-Beetle 422 ENGRAVINGS ON WOOD. Brownings Aneroid Barometer ... 41Crystalline Style of Anodonta ... 69 Anglo-Saxon Pottery 121,124, 126 Bryum intermedium 156 Physiology of Entozoa, 193, 194,195, 197Berthon Telescope Stand 203 Roman Samian Ware, PottersMarks, etc., 229, 230, 231, 232, 233,234, 235, 236 Spectroscopic Apparatus 238 Pelopceus Madraspatanus, nest,etc 315,316 Jungermannise 334, 336 Apparatus for Examining Stellar Spectra 391 HAEEILD, PBIHTBB, Pentacnnus Caput-M One-third natura a St. Lucia, West Indies. vn by Mr. J. Dinkel from ;i specimen in the British Museum. THE INTELLECTUAL OBSERVER. AUGUST, 18 64. SEA LILIES. BY PROFESSOR WTVILLE THOMSON, , , , , ETC., President of the Belfast Natural History Soeietj. (With a Tinted Plate.) Under a tall glass shade on the top of one of the Echinodermcases in Room II. of the northern Zoological gallery in theBritish Museum, there is a beautiful plant-like organism, which,from its prominence and style of mounting, seems to be heldof great account even in that room, into which all the sea holdsrare or beautiful among its urchins and sea-stars are con-gregated. At a first glance one might imagine that some cunningworker in mosaic had modelled a strange exotic lily, piecingit together of thousands of minute symmetrical blocks of paleyellowish terra-cotta. A tall stem, formed of a multitude ofrounded or slightly pentagonal joints, supp


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