Mr. A. W. Waters on Australian Bryozoa. 5 



I have not been able to satisfy myself as to its signification. 

 In no other case does an ovicell seem to have been described, 



Crihrilina clithridiata^ Waters. (PI. I. figs. 6-9.) 



Cribrilina clithridiata, Waters, Ann. & Mag. Nat. Hist, ser. 5, vol. xx. 

 p. 187, pi. V. fig. G, pi. vi. fig. 2. 



In the material from Green Point there are several speci- 

 mens with ovicells which are globose, large, much raised, 

 with a large mark on each side, called a " pyriform fossa " bj 

 Hincks and a " large stigma " by Busk, being similar to the 

 ovicells of G. iiliilomela and G. Jigularis. On the upper part 

 of the ovicellular elevation, though above the ovicellular 

 chamber, there are six marks or papillaj similar to those on 

 the front of the zooecium. The aperture of the ovicelligerous 

 cells is subquadrangular, exactly similar to that of the 

 ordinary zooecia of G. Jigularis, and this is a point which 

 should be kept clearly in view when considering the classifi- 

 catory position. 



When G. clithridiata is decalcified there are conspicuous 

 marks on the front, like the fenestra? of the Gatenicelloi (much 

 as in G. ventricosa) , and the central area is thicker, forming 

 a kind of shield ; but there are no other marks, whereas in 

 G. Jigularis (fig. 10), G. Jatimarginataj &c. when decalcified 

 there are marks corresponding to the rows of punctures in the 

 calcareous wall. The ^' fenestra? " are of course under the 

 papilla? at the end of the ridges. 



Grihrilina radiata, Moll. 

 For syuonyms see Hincks, Brit. Mar. Polyzoa, p. 185. 



A specimen from Green Point is a typical G. radiata, in 

 shape and size similar to specimens from Naples. There are 

 five ribs on each side and a central one below. The ovicell 

 has a keel. 



MacGillivray mentions the species in his ' Catalogue of 

 Marine Polyzoa of Victoria,' p. 22 ; but it does not appear 

 to have had any other notice from the Australian area. 



Microporella coscinopora, var. armata, Waters. 

 (PI. 1. figs. 1-5.) 



Microporella coscinopora, var. armata, Waters, Quart. Jouru. Geol. 



Soc. vol. xxxvii. p. 331, pi. xv. fig. 25 ; * Clialleuger ' Suppl. Eep. 



p. 39. 

 Microporella coscinopora, var. mncronata, Waters, Quart. Journ. Geol. 



Soc. vol. xli. p. 2t»o. 



