ALDII^GA AND THE RTVER-MTJKRAY CLIFFS, SOUTH AUSTRALIA. 291 



Aperture about 0*1 millim. wide, which is slightly smaller than that 

 of M. lepida. 



Log. Living : Queenseliff &c., Australia. Possil : Aldinga, Mt. 

 Gambler (Australia); jSTapier, and Tanners Eun (iS'ew Zealand). 



16. MONOPORELLA CRASSATINA, WatcrS. 



Monoporella crassatina^ Waters, Quart. Journ. Geol. Soc. vol. 

 xxxviii. p. 270, pi. vii. fig. 8 ; ibid. vol. xxxix. p. 435. 



Lepralia japonica^ Busk, ' Challenger ' Report on the Polyzoa, 

 Cheil. p. 143, pi. xvii. fig. 5. 



Loc. Living : Cobie, Japan 8-10 fathoms (Busk). New Zealand 

 (from Miss Jelly). Possil : jSTapier and "Waipukerau (jN^ew Zealand) ; 

 Mt. Gambler, Waurn Ponds, Aldinga, River-Murray Cliffs (Australia). 



17. Monoporella sexangularis, Goldf. (PL YII. fig. 2.) 



Eschara sexangularis^ Goldf. ; Hagenow. Maast. Kreide, p. 81, 

 pi. X. figs. 3, 4, 5. 



Eschara ClarJcei, T.-Woods, Trans. Eoy. Soc. N. S. Wales, 1876, 

 p. 2, figs, iv.-vii. 



? Eschara piriformis, Stmt, ^ Two Exped. Interior S. Austr.' 1833, 

 ii. p. 253, pi. 3. fig. 2. 



Vincidaria maorica, Stoliczka, Bry. Orak. p. 153, pi. xx. fig. 8. 



Monoporella sexangularis, Waters, Quart. Journ. Geol. Soc. vol. 

 xxxix. p. 435. 



Bijiustra excavata, Manzoni, Bri. foss. del Mioc. d'Aust. ed 

 Ung. p. 67 (19), pi. xiii. fig. 14. 



There are two specimens from Aldinga, both fenestrate. In the 

 one the fenestrse are about 4 millim. long, in the other they are 

 7-8 millim., and in the first there are zocecial avicularia (onycho- 

 cellaria), of the same shape as those figured by Hagenow, bub without 

 the great elongation. The avicularian opening is elongate in the 

 centre of the avicularium. In my former paper I pointed out that, 

 although identifying it with Hagenow's species, I had not found any 

 avicularia in either; and it is interesting to find that this character 

 now justifies the determination. The oral aperture (0*22 millim.) 

 is rather smaller than in the specimens from Muddy Creek &c. ; 

 and in the zooecia surrounding the fenestras, there is not any oral 

 opening, but an elongate slit, much like the avicularian opening. 

 Beissel describes and figures sach border cells in his Eschara pulchra, 

 and blind cells are found in Acleona and other Chilostomata. There 

 'is also a non-reticulated specimen from the Eiver-Miu"ray Cliffs, which 

 Prof. Tate marked Eschara piriformis, Sturt ; but the E. piriformis, 

 Goldf., of the Maestricht beds has much larger zooecia, with very 

 large opesial opening (0-6 millim.) nearly as wide as the zooecium. 



Some are flat bilaminate expansions, one is flattened and folia- 

 ceous, while others are subcylindrical, and this Yincularia-form no 

 doubt represents the Vincularia maorica of Stoliczka ; and now that 

 I have seen these, I consider that the fossil from Curdles Creek might 

 be called var. minima or var. tuberculata. 



