?,xoLo?'r.] NATURAL H!gTORY. appearance-of calcedouy, and is harder than ordinary car- bonate of lime. The characters of the shells in Captain King's specimens from this place are indistinct; but the speeimeas at the Jardin du ]{?i, which, there is reason to suppose, have come from this part of the coast, eontnin shells of several species,--belonging among others to the genera, corbula, ehama, earallure, por- eellanea, turbo, eerithium. M. Prevost, to whom I am in- debted for this account, observes, that notwithstanding'the recent appearance of the shells, the beds which contain them are stated to oceur at a considerable height above the sea: and he remarks that the aspect of the rock is very like that of the shelly depesite of St. Hespiee, near Nice. KxNG Oso?Ga's $0um), on tlme south coast, east of south from Cape Leeuwin.--Benutifully white and 'fine ?raartzo? rand, 'from the sea-bench. Yellowish grey 9?.an/t?, from Baldohesd. Two varieties of a ca/careom roei, of the same nature with that of Dirk Itartog's Island; consisting of par- tides of translucent quartzose sand, united by a cement of yellowish or eream-coloured earbona? of lime, which has a flat conchoidal. and splintcry fracture, and is ?o hard as to ?ield with difiieulty to the knife. In this compound, there. are not any distinct angular fragments, as in the stone of Dirk Hartog's Islands; but the calcareous matter .is very unequally diffused. A third form in which this recent ealcareous matter ap= pears, is that of irregular, somewhat. tortuous, stem-like bodies, with a rugged sandy surfnee, and from half an inch to an' inch in diameter; the cross fracture of which shows that they are composed of sand, eementmi by carbonate of lime, either uniformly mixed throughout, or forming a crust around caJeareous matter of a spongy texture; in which
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