1. Cyclostigma kiltorkense , Haught. Ann. & Mag. Nat. Hist. ser. 3, vol. v. p. 444. Stem clothed with a finely wrinkled bark. It is covered with numerous and very close striæ; and these very fine striæ pass away into spiral lines, and are in some places joined together. When the outer bark is wanting we have only these fine striæ. Such a specimen I received as C. Griffithi , Haught. On the bark there stand in regular rows small round warts, which have a circular depression at the top. These are surrounded by a projecting rim, which is often striatetd with fine cross lines. Sometimes these warts look like small hollows having a smooth middle part. The warts are about 2 millims. in diameter. They are from 8 to 13 millim. apart, and form highly oblique transverse rows. Pl. IV. fig. 5 a is a piece of a stem; 5 b a portion with the wart, magnified. Branches .—These agree entirely with the stems in the formation of the bark and in the warts. The bark is also wrinkled and covered with very fine and close striæ. The warts are from 6 to 8 millims. apart, and in a branch 13 millims. broad there are two or three in the oblique row (fig. 4, and, a portion enlarged, fig. 4 b ). As remains of fruit-cones, which Schimper has described as Lepidostrobus Bailyanus (Traité de Paléontologie Vegét. ii. p. 71), are often found near the stems of this they probably belong to it. In support of