(1) Five naturally deposited eggs of the Cape Bdellostoma have been found, two containing well-advanced embryos.

(2) The eggs are larger than those of other species, the anchor-filaments are shorter, and there are two polar rings.

(3) The general structure of the shell is similar to that described for other species, and there are numerous small projections on its surface, as in some species. These consist of the columns of the columnar layer modified at the apex of the projection.

(4) There are numerous small fissures in the shell, probably respiratory apertures.

(5) The polar rings have a definite structure, differing from that of the rest of the shell, in that the inner layer becomes greatly enlarged, and the outer layer much reduced.

(6) The anchor-filaments are not homogeneous in their structure, but consist of all the layers of the shell, the chief modification being that the heads of the columns of the columnar layer becomes drawn out so as to appear as striations.

(7) The anchors' consist of the modified columnar layer and the stratified layer. On their outer surface the heads of the columns of the columnar layer appear as disconnected dark dots, while their lower surface consists of the same elements as the surface of the filament.

(8) In the embryo the segmental duct occurs at the distal end of the last tubule of the pronephros, but, though having a lumen, does not open into it. It is found also at the distal end of the second last tubule, where, however, it becomes solid, and disappears. It was not found extending further into the pronephros.

(9) The tubules of the mesonephros are not strictly segmentally arranged, in that there are six tubules in three segments of the body behind the pronephros, though there is one tubule for each succeeding segment, as far as the mesonephros extends.

I am greatly indebted to Prof. Bashford Dean for his generous assistance in literature on the early stages of Bdellostoma and allied subjects. As a pioneer in this work, he is deeply interested in the finding of the eggs of the Cape Bdellostoma. Prof. Price has also kindly sent me reprints of his important papers on the development of the excretory organs.

I have also to express my obligations to Mr. P. MacManus, who has redrawn for me figs. 2 and 10.

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