BRYOZOA PROM NEW ZEALAND. 



45 



1. Cell aria malvinensis, Busk. 



Oellaria malvinensis, Waters, Quart. Journ. Geol. Soc. vol. xli. 

 p. 285. 



Log. Living : various localities in the Southern Hemisphere. 

 Fossil : Australia ; Nelson (II.), Waipukurau and Shakespeare Cliff 

 (New Zealand). 



2. Membranipora monostachys, Busk. (PI. VI. figs. 3 & 6.) 

 Memhranipom monostachys, Busk, Brit. Mus. Cat. p. 61, pi. Ixx. 

 For synonyms see Hincks, Brit. Mar. Polyzoa, p. 131. 



A specimen from Napier has a large spine below the aperture and 

 numerous smaller ones round the opesia. The ovicell, which has 

 not been previously seen in M. monostachys, is subglobose, with a 

 strong rib on the front enclosing a subtrianguiar or suboval space, 

 which is divided into two equal parts by a median rib. The ovicell, 

 in structure, somewhat resembles that of M. aurita, Hincks, and the 

 raised rib on the ovicell occurs in many Membraniporce, such as M. 

 lineata, M. galeata, M. unicornis, M. sophice, M. circumclathrata, 

 M. dentata, &c. This differs from M. lineata in having a large 

 spine below the opesia, but there is no doubt that this, M. pilosa, 

 and M. pyrwla, Hincks, are closely allied. The ovicell is like that 

 of M. valdemuniia, Hincks. Miss Jelly has a recent specimen from 

 Napier with similar ovicells. 



Loc. Fossil : Napier. 



3. Membranipora lineata, L. 



In a fossil from Shakespeare Cliff the zocecium has a thick border 

 and was surrounded with spines. The ovicell is short, and between 

 the zocecia there are interspersed small cells, with a small, round, 

 or elongate opening ; these I have sometimes called blind cells. 



The form of the ovicell seems to indicate that this is M. lineata ; 

 but as there are several species closely allied, it is difficult to speak 

 with certainty in such a case. 



4. Membranipora Lacroixii, Aud., var. grandis. (PI. YI. fig. 1.) 



There are several specimens of Membranipora from Napier which 

 I cannot identify with certainty, but which will be recognizable 

 when again found. The opesia, 0*4 millim. long, is oval, occupying 

 nearly a third of the zooecia, and has a distinct border upon which 

 I do not find any spines. 



The space between the zocecia sometimes bears an avicularium, 

 but more often is divided into two or three spaces, sometimes with 

 punctures. The ovicell, which is unknown in the typical M. Lacroixii, 

 is large, raised, globose. 



This is allied to my M. tripunctata, but the narrow longitudinal 

 band between the zooecia is wanting. 



5. Membranipora Dttmerilii, Aud. (PI. VI. fig. 4.) 



Flustra Dumerilii, Aud., Savigny, Descr. de PEgypte, pi. x. fig. 12. 

 For synonyms see Brit. Mar. Polyzoa, p. 156. 



