CREY MENILIT?. 2 51 Internally it is glimmering or dull. ' The fracture is very flat conchoidal, and is sometime? almost even. The fragments are angular and sharp edged. It is very feebly translucent on the edges, and some* times quite opaque. It is semi-hard in a high degree. It is easily frangible; and Rather heavy, blit in a low degree. Specific gravity, 2.28G, 2.375, Hoff. Ccognoslic and Geographic Situations. It occurs at Argenteuil near Paris, imbedded in a clayey marl; also in gypsum which alternates with this tnarl. It has also been found at St Ouen, near Paris; and, according to Ilauy, on the Maase. 11. Jasper*. This species is divided into five subspecies, viz. Egyp tian Jasper, Striped Jasper, Porcelain-Jasper, Common Jasper, and Agate-Jasper. First Subspecies. Egyptian Jasper. This subspecies is subdivided into two kinds, viz. Red Egyptian Jasper, and Brown Egyptian Jasper. First * Etymologists have not been able to ascertain the origin of the word Jasper. We only know that it is of high antiquity, because it occurs in the Jlcbrew and Grecian languages. We arc also ignorant of the particular Stone denominated Jasper by the ancients.