Mr. A. W. Waters on Australian Bryozoa. 187 



India, California, Australia ; Holborn Island, Queensland 

 {H.)-, Darnley Island, Torres Straits, 10-30 fath. [Br.]. 

 Fossil : Miocene of Europe j Bairnsdale, Australia. 



36. CribriUna monoceros^ Busk, non Reuss. 

 (PI. VT. %. 7.) 



The mandible has the lucida very low down, and this posi- 

 tion sometimes obtains in Retepora and Flustra, but it is 

 usually more central. There are two lateral processes as in 

 Adeonella, Membrampo?^a, &c. The operculum is fleshy and 

 granulate. The chitinous parts of C. acanthoceros are very 

 similar. 



Log. Living : S. America ; various localities in Victoria ; 

 ' Challenger ' Station 303, 1325 fath. ; Station 235 ; N. Pacific, 

 3125 fath. ; Station 315, 12 fath. ; N. side of Watson's Bay, 

 Port Jackson, " under stones." Fossil: Bairnsdale (Victoria) 

 in Eschara-iorva. ; Napier, adnate, and Petane (N. Zealand). 



37. CribriUna tuhulifera, Hincks. 

 (PI. V. figs. 2, 6.) 



CribriUna tubidifera, Hincks, Aun. & Mag. Nat. Hist. ser. 5, vol. viii. 

 p. 56, pi. i. fig. 7 (1881) ; Waters, Quart. Journ. Greol. Soc. vol. 

 xxxix. p. 43G. 



The specimen from Ball's Head has two rows of erect 

 tubular processes instead of a single one, as described by 

 Hincks, and in this respect resembles the G. suggerens, which 

 I described fossil from Curdles Creek about the same time as 

 Mr. Hincks published his species. The aperture of C. sug- 

 gerens is only 0'06 millim. wide, whereas this is 0'14 millim., 

 being larger than the fossil from Muddy Creek, which is only 

 0*1 millim. wide. The zooecia of my G. suggerens and this 

 specimen of tuhulifera are the same size. 



Log. Bass's Straits {H.) ; Ball's Head, Port Jackson, 12 

 fath. Fossil : Muddy Creek, Victoria ; and var. suggerens 

 from Curdles Creek. 



38. Gribrilina Glithridiata, sp. nov. 

 (PI. V. fig. 1 ; PI. VI. fig. 2.) 



Zoarium incrusting. Zooecia elongate, ovate, distinct, 

 convex, about half of the front occupied by an oval area 

 divided by radiating lines into six sections, with an elliptical 

 opening at the peripheral end of each, the furrows not punc- 

 tured. Oral aperture clithridiate, the distal edge rounded and 

 the proximal triangular, with a very considerable contraction 

 on each side about the middle of the aperture, and about this 



13* 



