458 MR. A. W. WATERS ON 34. The Marine Fauna of British East Africa and Zanzibar, from Collections made by Cyril Crossland, M.A,, B.Sc, F.Z.S., in the Years 1901-1902. Bryozoa *— Cheilo-stomata. By Akthur Wm. Waters, F.L.S., F.G.S.f [Received March 13, 1913 : Read April 22, 1913.] (Plates LXIY.-LXXIII.J and Text-figures 79-82.) Index. Systematic : Page Srettia tropica, sp. n 465 Synnotum pemhaensis, sp. n 465 S. contorta, sp. n 466 Sicellaria chualcensis, sp. n 467 Stirparia zanzibariensis, s]). \\ 469 S. dendrograpta, sp. n 470 Scrupocel laria tvasinensis, sp. n 479 Yittatioella elegans, var. Zanzibar iensis, nov 485 Cellar la gracilis, \ ax. tessellata, wov 495 C. wasinetisis, sp. n 495 OstJiimosia zanzibariensis, sp. n 508 Smittina sp 514 Lepralia tuasinensis, sp. ii 516 Petralia chuakensis, sp. ii ..., 518 F. vultur, \aY. armata, nov. 518 Mhyncliozoon profimdum, ya.Y . laminatum, nov 523 Adeonellopis orosslandi, sp. n 531 Scrupocellaridse 472 Catenicellidae 483 Cellaria 493 Scliizoporella 505 Cellepora 509 Lagenipora 510 Lepralia 515 Myriozoidea 520 Retepora 524 The collection made by Mr. Cyril Crossland in the neighbour-hood of Zanzibar contains 76 species or varieties of Cheilostomata, and all are from shallow water, in fact with the exception of two are from 10 fathoms or under ; so that, for a purely shallow-water collection, it is a very large one. Points of Special Interest. (1) In Stirparia the first zooecium of a tuft has the character of a primary zooecium (p. 470). * [In view of the difference of opinion as to whether this Phylum should he called Bryozoa or Polyzoa (see Proc. Linn. Soc. 1911, p. 61) I have not interfered with the preference of the author. — Editoe.] t Communicated by Cyril Ceossland, M.A., B.Sc, F.Z.S. X Vov explanation of the Plates, see p. 532.