English: Alder, Joshua, Embleton, Dennis, Hancock, Albany, Hopkinson, John,Norman, Alfred Merle ,1905-12 The British Tunicata; an unfinished monograph, by the late Joshua Alder and the late Albany Hancock. Edited by John Hopkinson, with a history of the work by the Rev. A. M. Norman.London,Printed for the Ray society. Volume 2 Plate 47

PLATE XLVII. Pelonaia corrugata Forb. & Goods, (p. 146)

FIGS. 1-3. Test and mantle laid open, exposing (in fig. 1) digestive and reproductive organs fully, the branchial sac being removed ; (in fig. 2) the inside of the branchial sac, the outer layer being laid open and partly removed, with the endostyle showing clearly in the centre, and the digestive and reproductive organs partially ; and (in fig. 3) the external surface of the branchial sac, the digestive and reproductive organs partially, and part of the surface of the test with fibrils : about three times natural size.* br. s. branchial sac . 4. The anterior end of fig. 2, showing apertures, tentacles, branchial tubercle (b.t.) with nerve ganglion (n.g.), oral lamina (o.l.), and endostyle : about six times natural size.

5. The anterior end of fig. 1 or 3, showing the apertures : about three times natural size.

6 and 7. Ovaries : about twelve times natural size. 6b is a continuation at x of 6a. 7 shows the same part as 6b in a more advanced stage of development.

Figs. 1 and 3 terminate abruptly, without showing the apertures, owing to the original drawings coming to the edge of the paper on which they are

drawn. (All Hancock's drawings are on half sheets of note-paper.)