^{page 63 note 2} In a few rare cases the coral may become cylindrical in the final growth stages and the septa then become amplexiod, retreating from the upper surface of successive tabulæ. The commencement of such a stage is indicated in Pl. V, Fig. 6. A unique specimen from Tournai, now in the Survey collection (R. C. 330), shows this habit. It is 4·5cm. in length, and the cylindrical distal portion measures 2·5 by 1·3cm. No trace of marginal dissepiments appears, either in the longitudinal section or in the calyx. In other species amplexoid septa accompany the acquisition of a cylindrical habit, and fuller reference to the matter will subsequently be given under Caninia cornucopiœ, Mich.

^{page 64 note 1} It is, however, sometimes lateally disposed, and in one or two rare instances lies distinctly on the convex side of curvature.

^{page 65 note 2} Ranging probably from the Upper Tournaisian to the Lower Visean.

^{page 66 note 1} As Dr. Vaughan informs me, the description of Z. aff. Phillipsi in his original paper (Q. J. G. S., vol. lxi, p. 270Google Scholar)is only applicable in its entirety to Z. omaliusi.

^{page 66 note 2} ”In this work I have received very valuable assistance from Mr. W. H. Wickes, Professor S. H. Reynolds, and Mr. H. F. Barke; Mr. Carruthers has uncomplainingly checked the identification of almost every specimen.”

^{page 67 note 1} This refers to the recent discovery of Z. delanouei and Densiphyllid Zaphrentids in conjunction at Malahide, co. Dublin.Google Scholar

^{page 68 note 1} I would regard the minor septa seen in Pl. V, Fig. 1, as having the greatest length attained in Z. konincki, as here defined.

^{page 69 note 1} Dr. Vaughan has figured an example in his Bristol paper (Q. J. G. S., vol. lxiGoogle Scholar, pl. xxii, fig. 3).

^{page 70 note 1} Sibly, F., “Carboniferous Limestone of the Mendip Area”: Q.J.G.S., vol. lxii (1906), p. 366.Google Scholar

^{page 70 note 2} In these notes it should be understood that Z. konincki is equivalent to Z. aff. cornucopiœ of Dr. Vaughan's earlier papers.

^{page 73 note 1} Geol. Mag., 1907, p.73.