288 



A. ^Y. WATEES ON CHILOSTOMATOTJS BEYOZOA FROM 



(Q. J. ITic. Soc. viii. p. 125), and the fossil from Bruccoli, which I 

 called Biflastra rliynchota, should be renamed. 

 Loc. Crag. 



8. ^lTembeaxipoea tempoeaeia, sp. nov. (PL YII. fig. 16.) 



Although this Memhranipora comes very near to several species, I 

 have been unable to identify it with any. The zooecia are very 

 large, with a large opesia, about 0'6 millim. long, whereas in few 

 species is it more than 0*3-0-4 millim. Above each zooscium 

 there are two avicularia with oval openings directed outwards. 

 The ovicell is small, short, and but little raised. The species in 

 most particulars corresponds with M. para, Hincks, but that has 

 spines in place of the avicularia. 



Loc. E,iver-Murray Cliffs. 



9. Membea2s^ipoea (Amphtblestetdj:) FLEMiifGn, Busk. 



Membranipora Flemingii, Busk, Cat. B. M. ii. p. 58, pi. Ixxxiv. 

 figs. 3-5 (only) ; Hincks, Brit. 3Iar. Polyzoa, p. 162, pi. xxi. fig. 1-3. 



A specimen from Aldinga is growing upon a Retepora. There 

 has been considerable confusion with the species, as it was at first 

 made to include forms which have since been separated, but the 

 fossil is undoubtedlj" Membranipora Flemingii^ as defined by Mr. 

 Hincks. It has the six oral spines, an ovicell similar to recent 

 specimens, and sometimes two avicularia below the area, but more 

 frequently there is only one, and this often at the end of a long 

 tubular projection. In some cases this chimney-like avicularium is 

 nearly as long as a zooecium. In no recent specimen has the avicu- 

 larium been found as much elevated, though it is always raised. 



MacGiUivray refers (Trans. Koy. Soc. Vict. vol. xviii. p. 120) with 

 doubt to specimens " seemingly referable to " M. Flemingii^ from 

 Port PhiUip Heads, Victoria. 



Loc. Eecent ; European Seas, widely distributed. 



10. Memeeaxipoea (Amphiblesteum) CTLrsDEiEOEMis, Waters, 

 Quart. Joum. Geol. Soc. vol. xxxvii. p. 323, pi. xvii. fig. 74, and 

 vol. xxxviii. p. 263, pi. viii. fig. 13. 



11. MEiiBEAxiPOEA (Amphiblesteum) paevicella, T.-Woods. (PI. 



VII. fig. 5.) 



Selenaria parvicella, T.-Woods, Trans. Phil. Soc. Adelaide, 1880, 

 p. 10, pi. ii. fig. 10 : Waters, Quart. Journ. Geol. Soc. vol. xxxix. 

 p. 441. 



Some fragments from the Eiver-Murray Clifls are better preserved 

 than those from Muddy Creek and Bird Eock : and here we see 

 there was a spine, or j)roce3s, over the elongate " avicular (?) cells," 

 and a broad denticle within the lower margin of the zooecial cells. The 

 dorsal surface is granulated, with a few large pores, and is divided by 

 parallel lines, which apparently radiate from the centre of the 

 colony ; cross-lines, which are very indistinct, divide the dorsal 

 surface into zooScial areas. The lateral rosette-plates form a regular 



