BRYOZOA PROM S.W. VICTORIA, AUSTRALIA. 



335 



has to be made from the characters in various cells ; consequently 

 the figure is, to a large extent, a restoration, which is not the case 

 with the other figures. I have shown the effect when the aperture 

 is broken down in different degrees : when completely worn away, 

 three nearly equal openings are seen, the central one being some- 

 what the largest ; in other cases an elongate opening is formed, 

 bounded on the top by the distal end of the peristome, and below by 

 the base of the subperistomial opening. 



This is closely related to Eschara heterostoma, Reuss (Bry. von 

 Crosaro, p. pi. xxvi. fig. 5), which we believe is synonymous 

 with his E. duplicata (loc. cit. p. (61 sep.) 273, pi. xxxiii. figs. 8, 

 10), from the Italian Eocene. 



The shape of the oral aperture would seem to be Lepralian, perhaps 

 much the same as in Lepralia Pallasiana ; and it is somewhat a matter 

 of doubt where this form should be generically placed. There are 

 some species as yet undescribed from the southern hemisphere, with 

 an arch more or less enclosing the aperture ; and until these have 

 been examined, it must be placed with Porina. 



Since the above was written, Mr. S. 0. Eidley has published, in 

 the Proc. Zool. Soc. 1881, an " Account of the Zoological Collection 

 made during the Survey of H.M.S. 'Alert '' (pt. Polyzoa)," and de- 

 scribes and figures an incrusting species with cells much resembling 

 those of P. columnata. For this he forms the genus Qigantopora, 

 and points out the similarity to Hippothoa fenestrata, Sm., which 

 seems to sometimes occur in an erect form ; and these three spe- 

 cies are evidently closely related ; but we provisionally retain the pre- 

 sent one under Porina until more complete specimens furnish further 

 characters upon which the genus can be founded. 



42. Lepralia corrtjgata, sp. nov. Plate XYII. fig. 60. 



Zocecia elongate, distinct, raised ; surface in irregular ridges and 

 furrows ; in the furrows a row of one or two pores ; lower part of 

 zocecia depressed, upper raised, with a large angular avicularium 

 forming a kind of peristome over the lower part of the aperture ; 

 one or two large pores at the lower part of the zocecium, just above 

 the aperture of the zocecium next below. Aperture rounded. Zoa- 

 rium either incrusting or in Eschara-form. 



Oral aperture 0*14 mm. wide. 



43. Lepraua monilipeea, M.-Ed., var. armata. Plate XV. fig. 24. 



Zocecia elongate, pyriform, raised in the centre, with a row of 

 pores round the border ; aperture oval, proximal edge slightly less 

 rounded than the distal ; a small angular avicularium on one or 

 both sides of the aperture ; in some cells larger angular avicularia 

 below the aperture. 



Aperture 041 mm. wide ; 0*14 mm. long. 

 Only a small fragment, worn at the back. 



. Lepralia spattjlata, sp. nov. Plate XVIII. fig. 87. 

 Zoarium erect, forming a solid stem, with zocecia all round. 



