286 A. W. WATEES OlSr CHILOSTOMATOTJS BRTOZOA FROM 



N'elson (from Leda marls vi.), Waipukerau, Shakespeare Cliff (Wan-^ 

 ganui) I'New Zealand]. 



2. Cellaeia AifGusTLLOBA, Busk ; Waters, Quart. Journ. Geol. Soc. 

 vol. xxxviii. p. 260, pi. ix. figs. 28-30. 



The avicularia are all situated at the edge of the zoarium. The 

 notch noticed in the avicnlarium of the Mount-Grambier specimens 

 is not distinguishable in the Aldinga fossil. 



3. MEMBEAiN^rPOEA APEETA, Busk. (PL YII. fig. 3.) 



Memhranij)ora aperta, Busk, Crag Polyzoa, p. 33, pi. iii. fig. 13. 



A specimen from Aldinga has the zoarium conical, resembling 

 Lunulites. The opesial opening is about 0'4 millim. long and 

 0*25 millim. broad, and the avicularia are about the same size. 

 The avicnlarium has three openings, the upper one large, trian- 

 gular ; below this a slit-like opening, and still lower down a semi- 

 lunate opening ; when these last two are broken down, they form 

 a single opening, as figured by Busk. There is one distal rosette 

 plate which is semilunate. 



This is not the Memhranipora aperta of Manzoni (Bri. di Cas- 

 trocaro, p. 9, pi. i. fig. 4). 



Log. Coralline Crag. 



4. Membeaklpoea ciectjlaeis, d'Orb. 



Flustrina circularis, d'Orb. Pal. Franc, p. 305, pi. 602. figs. 11-13, 



? Memhranipora tuherculata, Busk, Crag Polyzoa, p. 30, pi. ii. 

 %. 1. 



In a specimen from the Eiver-Murray Cliffs the zoarium consists 

 of many layers, forming an irregular subglobular mass, but perhaps 

 the colony commenced on a Cellepora. The opesia are variable, in 

 some cases being quite round, in others subtriangular, with the lower 

 edge straight and rounded, and contracted towards the top ; in other 

 cases the opening is more oval. Opesia of average ceU 0-20-0"25 

 millim. long. There are two small avicularia above each opesial 

 opening ; but as the zooecia are arranged in quincunx, this makes 

 them appear as if surrounded by six avicularia. 



The structure of Flustrina haculina, d'Orb., and F. pentagona is 

 similar. 



Log. Souge, pres de Yendome (Loir et Cher), Cretaceous ; River- 

 Murray Cliffs. 



5. M^MBEANiPOEA Savaeto, Aud. 



Memhranipora ligerensis^ d'Orb. loc. cit. p. 550, pi. 607. figs. 

 5,6. 



Flustrellaria tuhulosa, d'Orb. loc. cit. p. 532, pi. 727. figs. 9, 10. 



Memhranipora suhtilimargo, Reuss, Bry. (Est. Ung. Mioc. p. 179 

 (39), pi. ix. fig. 3. 



Memhranipora Lacroixii, Reuss, loc. cit. p. 40, pi. ix. fig. 8. 



? Memhranipora reticulum, Reuss, Foss. Polyp, d. Wien. Tert. 

 p. 98, pL xi. figi 25. 



