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EARTHY GYPSUM. 231 First Subspecies.• Earthy Gypsum. Gyps-erde, Werner. Gypsum terrestre farinaceum; Farina fossilis, Wall. t. i. p. 36. —Gypserde, IVid. s. 543.—Farinaceous Gypsum, Kiriv. vol. i. p. 120.—Gypserde, Estner, b. ii. s. 1095- Id. Emm. b. i. s. 527.—Gesso terroso, Nap. p. S79-—Lc Gypse terreux, Brock, t. i. p. 601.—CIihux sulpliatfee terreuse, Hany, t. ii. p. 278 Erdiger Gyps, Ram, b. ii. 2. s. 391. Id. Lud. b. i. s. 163. Id. Suck, lr th. s. 669- Id. Bert. s. 105. Id. Moks, b. ii. s. 178.—Chaux sulphatee terreuse, Lucas, p. 13.—Er diger Gyps, Leonhard, label, s. 37.—Chaux sulphatee Gypse terreux, Brong. t. i. p. 174.—Cliaux sulphatee terreuse, Beard, p. 52.—Erdiger Sclenit, IIam. s. 125.—Erdiger Gvps, Kar- slen, Tabel. s. 52.—Farinaceous Gypsum, Kid, vol. i. p. 65. —Chaux sulphatee terreuse, Hauy, Tabl. p. 10.—Gypserde, Lcnz, b. ii. s. 833.—Earthy Gypsum, Aikin, p. 138. External Characters. Its colour is yellowish-white, which passes into yellow ish-grey, and sometimes inclines to snow-white. It is composed of loose dusty particles. It is dull. It feels meagre, and rather rough. It soils slightly. It is light. O Gcognoslic Situation. It is found immediately under the soil, in beds several lect thick, resting on gvpsum, both of the fust and se- }» 4 eond
