MR. A. W. WATEBS ON MEMBEANIPOEID^. 673 



above the aperture, except in the ovicelligerous cells, when there 

 are two. In the F. rohorata, MacGr., there are usually two, 

 though frequently only one above the aperture, and the marginal 

 zooecia only have one avicularium. In F. ligulata the external 

 zooecia have small lateral avicularia, resembling those of F. tri- 

 setnata, B. In some specimens of ligulata no spines occur, in 

 others they are fairly general. 



The I. rohorata, typica, occurs living from Victoria, New 

 South Wales, and Bass's Straits. The var. ligulata from Victoria 

 and New Zealand, and fossil from "Waurn Ponds. 



F. spicata, MacGr. Living : Victoria. 



Chapebia spinosa (MacG.) (non cTOrh., non Jullieri). 



Membranipora spinosa, MacO., Zool. Vict. dec. xiii. p. 107, pi. 127. 

 fig. 8. 



Mr. Kirkpatrick has called attention to the fact that Qaoy 

 & Gaimard did not call their " epineuse " Membranipora spinosa, 

 but acanthina, therefore MacGrillivray'a name can stand. It has 

 the spines more delicate and more numerous than in C. acanthina, 

 and they stand erect, more or less in a bundle, as described by 

 MacGrillivray. 



The rosette-pores are numerous, forming a line along the 

 middle of the wall. 



Log. A^aucluse Point (N. S. "Wales), Victoria. 



Chapeeia ANNULrs (Manzoni). 



Membranipora annulus, Manzoni, Bry. foss. Ital. 4a cent. p. 7, pi. i. 

 fig. 6 (?) ; Bri. di Castrocaro, p. 12, pi. i. fig. 9 ; Waters, " Tert. CM. 

 Bry. from New Zealand,^' Q. Journ. Geol. Soc. vol. xliii. p. 47, pi. vi. 

 figs. 2, 5, & 9. 



Amphiblestrum annulus, MacGillivray, Tert. Polyz. of Victoria, p. 43, 

 pi. vi. fig. 3. 



Membranipora galeata, Busk, Brit. Mus. Cat. p. 62, pi. Ixv. fig. 5 ; 

 " Zool. of Kerguelen,^^ Phil. Trans, clxviii. p. 195 ; Zool. Chall. Exp. 

 pt. XXX. p. 64. 



Membranipora dentata, Waters, Q. Journ. Geol. Soc. vol. xxxviii. 

 p. 263, pi. viii. fig. 14. 



Amphiblestrum cristatum, Busk, Zool. Chall. Exp. pt. xxx. p. 66, 

 pi. XV. fig. 1. 



This was at first described by Manzoni from very unsatisfactory 

 specimens, but in the same author's later work recognizable figures 

 were given, and in my paper on New Zealand fossils I showed 

 that it is subject to considerable variation. 



