61. Large-foliated white selenite. “Close to the Tchad, Kanem.”
62. Compact limestone, of bluish-grey colour, divisible into tabular fragments. “Benioleed, under the basalt.”
63. Light cream-coloured nearly compact limestone, in tabular fragments; fracture even, fractural surface slightly glimmering. Benioleed.
64. Fragment of a similar variety of limestone, with conchoidal fracture. “Benioleed, lowest observable stratum except one.”
65. Compact limestone, of a reddish and cream yellow colour, variegated with pale brown, of very close texture, and small-conchoidal fracture. “Hills to the north of Benioleed.”
66. Fragment of a greenish-grey tabular magnesian limestone, splendent on the fractural surfaces, the lustre produced by a curved-lamellar, though (in one direction) apparently compact structure. “On the ridges between Meshroo and Tegerhy.”
67. Yellowish-red, close-grained, nearly compact limestone, here and there with minute scales; external exposed surface uneven, glossy. “Temedetan, forming thick strata.”
68. Rolled fragment, of a reddish-yellow variety of magnesian limestone, with glossy surface, and of earthy fracture, including some dark-coloured grains, (oxide of manganese?) “Found in the deserts, sometimes finely dendritic.”
69. Light cream-coloured hard (magnesian) limestone, with earthy uneven fracture; the exposed surface shining, partly corroded, partly smooth. “Hills of Gaaf.”
70. A similar variety. “From the Assoud, Wady el Malagi.”