192 Mr. A. W. Waters on Australian Bryosoa . 



avicTilarian chamber is often much raised, looking like an 

 ovicell. 



Loc. Bass's Straits, 38 fath. ; Heard Island ? (B.), 75fath. ; 

 Port Western, Melbourne [W.)-, Sow-and-Pigs Eeef, Port 

 Jackson, 3-4 fath. ; Semaphore, Adelaide (1^.). 



50. ScMzoporella tuberosa (Rss.). 

 (PI. VI. figs. 9 & 10.) 



Eschara tuberosa, Rss. Denkschr. Ak. Wien, vol. xxv. p. 188, pi. vi. 



figs. 9, 10, pi. viii. fig. 1. 

 ScMzoporella biturrita, Hincks, Aim. & Mag. Nat. Hist. ser. 6, vol. xiv. 



p. 280, pi. ix. fig. 8 ; see also ibid. vol. xvii. p. 269. 

 Gephyrophora polymorpha, Busk, ' Challenger ' Rep. p. 167, pi. xxxiv. 



fig. 2. 

 Schizoporella tuberosa, Waters, Quart. Journ. Geol. Soc. vol. xliii. p. 67, 



pi. viii. fig. 29. 



This is interesting for the great variability to which the 

 avicularia are subject ; in what we may call the most normal 

 form there is a tower on each side of the oral aperture, and 

 the avicularium is placed on the side directed away from the 

 aperture ; but sometimes, on the same colony, the towers bear 

 no avicularia, but have a small round opening on the summit. 

 In some cases the avicularian chamber is not so much raised, 

 and then the mandibular opening is directed towards the 

 distal endof the colony. I do not possess any specimens with 

 the avicularia arching over the mouth, but in the Ziirich 

 Museum there is a fine one from Cape Agulhas (S. Africa) 

 showing the arching just as figured by Mr. Busk. Possibly 

 Beptescharellina cornuta^ Gabb & Horn, is this species, though 

 it may be 8. hiajperta. 



The attachment is by irregular elongated or tubular projec- 

 tions. A variety described as var. angustata occurs fossil in 

 New Zealand. 



Loc. Port Phillip Heads (bilaminate) j Semaphore, Ade- 

 laide (Hemescharan) ; Cape Agulhas &c., S. Africa ; Bondi 

 Bay, N. S. Wales; Botany Bay (Lepralian), and Inner 

 North Head, Port Jackson, 8 fath. (Hemescharan). 



51. Schizoporella Ridleyi, MacG. 



For sjTionyms, see Waters, Quart. Journ. Geol. Soc. vol. xliii. p. 64. 



Log. Elizabeth Island, 6 fath. {R.)] Victoria {MacO.) -^ 

 Sow-and-Pigs Reef, 3-4 fath.. Port Jackson. Fossil : 

 Waipukurau and Napier (?), New Zealand. 



52. ScMzoporella conjinita^ Waters, var. ratoniensis. 

 There are only small pieces of narrow compressed branches 



