202 Mr. A. W. Waters on Australian Bryozoa. 



p. 24, pi. xvii. fig. 56 ; Waters, Q. J. G. S. vol. xli. p. 308 ; Pergens, 



" Plioc. Bry. von Rhodos," Ann. k.-k. Hofimis. vol. ii. 1887, p. 31. _ 

 Membranipora canariensis, Smitt, Floridan Bry. pt. 2, p. 10, pi. ii. 



figs. 69-71. 

 Cupularia guineensis, Busk, Brit. Mus. Cat. p. 98, pi. cxiv.; 'Cliallenger' 



Rep. p. 206, pi. xiv. fig. 6. 



As I have previously shown in one specimen from Princess 

 Charlotte Bay, the snlcate structure of the under surface 

 is very m_arkecl; but upon careful examination faint cross 

 divisions can also be distinguished, thus separating the 

 dorsal surface into zooecial divisions. A few of the central 

 zooecia are closed by a calcareous lamina, perforated round 

 the border, as figured by Manzoni in C. Haidingeri^ E-ss. 

 (Bri. foss. del Mioc. d'Aust. &c. pi. xvi. fig. 54). 



Pergens agrees that I am probably right in uniting both 

 guineensis and stellata with canariensis^ and thinks that it is 

 perhaps identical with C. Haidingeri. 



Log. Living : Canaries ; Madeira ; Florida, 10-44 fath. ; 

 New Guinea ; Torres Straits ; Philippine Islands ; Princess 

 Charlotte Bay, N.E. Australia, 13 fath. Fossil : Miocene 

 and Pliocene of Europe, numerous localities ; Aldinga, S. 

 Australia. 



EXPLANATION OF THE PLATES. 

 Plate V. 



Fig. 1. Cribrilina clithi-idiata, sp. nov., X 25. 



Fig. 2. Cribrilina tubulifera, Hincks, X 50. 



Fig. 3. Lepralia elimata, sp. nov., X 25. 



Fig. 4. Schizoporella clivisopora, sp. nov,, X 25. 



Fig. 5. Forma inversa, sp. nov., X 25. 



Fig. 6. Cribrilina tubulifera, H., X 25. 



Fig. 7. Avicularium oi Rhynchopora crenulata, sp. nov., X 85. 



Fig. 8. Rhyncliop)orn crenulata, sp. nov., X 25. 



Fig. 9. Mucronella Ellerii, MacG., var. biaviculata, nov., X 25. 



Fig. 10. Tubucellaria oinmtioides, Pall., X 25. 



Fig. 11. Selenaria concinna, T. Woods, X 25. 



Fig. 12. Memhranipora tripunctata, Waters, X 25. 



Fig. 13. Conescharellina eleyans (d'Orb.), X 25. 



Figs. \i.-17. Conesc/iarellinaelegans (d^OTh.),'a&tmal size. 14. Flat speci- 

 men seen laterally. l5. Ditto, sp. seen diagonally. 16. Ditto, 

 upper surface of thick specimen. 17. Ditto, upper surface of thin 

 specimen. 



Fig. 18. Membranipora tripunctata. Waters, natural size. 



Fig. 19. Avicularian mandible of ditto, X 250. 



Fig. 20. Mandible of vicarious avicularium of ditto, X 85. 



Plate VI. 

 Fig. 1. Operculum of Microporella decorata, var. lata, MacG., x 85. 

 Fig. 2. Operculum of Cribrilina clithridiata, sp. nov., X 85. 

 Fig. 3. Operculum of Schizoporella triangula, H., X 85. 

 Fig. 4. Operculum of Schizoporella divisojjora, sp. nov., X 85. 



