By the kindness of Mr. Cosmo Johns, I was privileged to study the fossils he had obtained from “the Carboniferous Basement Beds at Ingleton,” and to add a note to his account of these interesting rocks (Geol. Mag., n.s., Dec. V., Vol. III. (1906), pp. 320–323). In it I suggested that these beds were deposited in Mid-Avonian (C-S) time, a suggestion that has been fully confirmed by Mr. Johns in his subsequent work. The object of this note is to describe the new species of Clisiophyllum, which is recorded in the list of fossils from the Basement Beds as “Clisiophyllid (cf. Carcinophyllum mendipense )” (loc. cit, p. 322). CLISIOPHYLLUM INGLETONENSE, sp. nov. P1 XXXVIII., figs. 1 a–e. DESCRIPTION. External form: — Cylindrical in adult, cornute only in young. Epitheca smooth with annular thickenings and frequent constrictions. Calyx deep, with sharp rim. Columella projecting from the floor of the calyx as a tall crested spike (quite as in Carcinophyllum ). Horizontal section at adult stage (Figs, 1 a, 1 d ): — Septa. Major and minor septa project forward into the medial area and are prolonged backward to the theca; the majors extend across the medial area, the minors merely project into that area as short spikes. All the septa are strongly thickened at the inner wall. A fossula is only indicated, on the concave side, by a shorter major septum. Inner Wall. Strongly marked out by stereoplasmic thickening. External Area. Completely septate, moderately broad, with 5 or 6 rows of interseptal vesicles. Medial Area. Broad with …