Mr. A. W. Waters on Australian Bryozoa. 193 



dichotomizing at a very acute angle. The oral aperture is 

 round, with the sinus a trifle more distinct than in the other 

 two varieties, and this has led me to change the generic 

 position. The surface is studded with large nodules consider- 

 ably raised and there are small round avicularia, usually one 

 to each zooecium. One fragment certainly seems to have 

 been articulated, as at the base there are numerous large holes 

 resembling those at the base of an internode of Cellaria. 



Loc. Off Katon, New Guinea, 7 fath. ; Cape Grenville, 

 N.E. Australia, 20 fath. (both dredged by Brazier). 



53. Schizoporella confinita, Waters, var. piperiensis^ 

 var. nov. 



Type Lepralia conjinita, Waters, Quart. Joui'n. Geol. Soc. vol. xli. p. 299, 

 pi. vii. fig. 10. 



There is a flat bilaminate fragment from Piper Island, with 

 the aperture about 0'12 millim. The surface is covered with 

 numerous dome-shaped elevations with a round avicularian 

 mandible at one side. 



With a species like the present it is difficult to know from 

 the aperture whether the lateral denticles form a sinus, or 

 whether the operculum is entire. From the recent specimen 

 I now think t]\at it should be placed under Schizoporella. 



Loc. Piper Island, N.E. Australia, 9 fath. 



54. Schizoporella divisopora^ sp. nov. 

 (PI. V. fig. 4; PI. VI. fig. 4.) 



Zoarium incrusting. Zooecia distinct, ovate, raised^ vitre- 

 ous in young cells^ the surface occupied with large stelliform 

 pores, which are separated into four or more divisions by 

 cross bars. Oral aperture emarginate, the sinus being large, 

 rounded. Ovicell raised, surrounded by a thick rim, inside 

 which are a row of pores, the centre of the ovicell raised into 

 a prominent umbo. 



The pores in M. Malusii are smaller and usually dentate, 

 as the teeth do not meet in the centre. Stellate pores occur 

 in several cases in Microporella^ but I am not aware of any 

 case in which they have previously been found in Schizopo- 

 rella. 



This may be allied to Schizoporella Maplestonei, MacG. 

 (Zool. Vict. dec. iv. p. 24, pi. xxxv, fig. 7), and to Lepralia 

 grossipora^ Ess. (in plate crassipora)^ JBry. QLst.-Ung. p. 177 

 pi. vii. fig. 6. 



Loc. Off the Bottle-and-Glass Eocks, Port Jackson, 8 fath., 

 rocky bottom, and Sow-and-Pigs Eeef, 3-4 fath., Port 

 Jackson, N. S. Wales. 



