674 MK. A. W. WATERS ON MEMBEANIPOKIDJi:. 



The name galeata is the oldest, but from the description and 

 figure in the British Museum Catalogue identification has not 

 been made, and I should not have recognized it as a synonym 

 without an examination of the Museum specimen. The M. cris- 

 tata of the ' Challenger ' should perhaps be considered a variety 

 on account of the pedicellate suboral avicularium. 



Loc. Living: Swains Bay, E. Falkland, in 4-10 fath.; Stat. 

 149 D, Kerguelen Island (Chall.). Fossil: New Zealand; 

 Australia ; the Pliocene of Italy and Sicily. 



Chaperia annulus, Manzoni, var. bilamikata, nov. (PL 47. 



figs. 5, 8, 9.) 



? Amphiblestrum cristatum, Busk, ' Challenger ' Report, vol. x. p. 65, 

 pi. XV. fig. 1 (type). 



From Port Elizabeth, S. Africa, I have a bilaminate Memhrani- 

 pora, which in its chief characters corresponds with Busk's 

 Ampliihlestrum cristatum. 



The zoarium is massive, contorted. The opesia is ova], de- 

 pressed, with an internal lateral plate on each side, as in G. spi- 

 nosa, Q. & Gr. On each side there is a large oral bifurcate spine, 

 besides a smaller spine, which, however, is not always distin- 

 guishable in ovicelligerous zooecia; below the opesia there is 

 a large pedunculate avicularium. The ovicell is widely open in 

 front, and is closed by its own operculum, which has a straight 

 lower edge. On the ovicell there is an area with a raised border 

 to it, and it does not absolutely correspond with the ovicell of 

 typical M. cristata. On the summit of the ovicell there is an 

 elongate raised avicularium, but when the ovicell is not developed 

 there is a similar avicularium in its place. There is no complete 

 bar across the avicularium. 



There are two large lateral rosette-plates (that is, one to each 

 neighbouring zooecium) with numerous pores. They are situated 

 moderately near the front wall of the zooecium, and seem to be 

 more or less in chambers. 



The type specimens from St. 149 ' Challenger ' have a spine 

 below the opesia at the edge of the lamina. 



Membranipoea tehuelcha {d'Orl.). (PI. 48. figs. 6-8.) 

 Flustra tehuelcha, d^Orb. Voyage dans TAmer. mei'id. vol. v. p. 4, p. 17, 



pi. viii. figs. 10, 14. 



Membranipora tuberculata, Busk, Quart. J. Micr. Soc. vol. vi. p. 126, 



pi. xviii. fig. 4. 



