6 Mr. A. W. Waters o?i Australian Bri/ozoa. 



Eschara sulcata, M,-Edw. Ann. des Sci, Nat. 2" s^r. torn. vi. p. 48, 



pi. V. fig. 2. 

 Eschara mucronata, MacG. Zool. of Vict. dec. v. p. 43, pi. xlviii. 



figs. 6, 7._ 

 Adeonellopsis latipimcta, MacG. Trans. Roy. Soc. Vict. vol. xxii. p. L'>4, 



pi. ii. fig. 5. 



A specimen from Green Point, Port Jackson, is a flat piece, 

 evidently part of a large foliaceous growth, and is the^. 

 latipnncfa of MacGillivray. Broad and narrow pieces from 

 Port Phillip in my collection show that the width must not 

 be made a specific character ; and the ' Challenger ' dredged 

 fragments of three sizes from Station 162, of which the 

 narrower one is only '2 millim. in diameter. A branched 

 .specimen from Green Point is the Adeonellopsis australis of 

 MacGillivray ; but in the size of the oral aperture, the form 

 of the chitinous elements, and the other zooecial characters I 

 cannot find any difference from the above and do not think 

 that the broad and narrow forms sliould be separated. 



In the Green Point " latipuncta " specimen there is always 

 the central avicularium directed upwards and usually one 

 small one at the side of tlie aperture, sometimes two ; but 

 there is seldom one below the cribriform area. In many of 

 the Australian specimens, both recent and fossil, there is in 

 different parts of the same colony considerable variation with 

 regard to the avicularia. In the typical Miocene M. coscino- 

 pora there is only a central avicularium, but the zooecial cha- 

 racters are generally similar. 



Loc. Living : Port Phillip (Victoria) ; ' Challenger,' 

 Station 162, 38-40 fatJi. ; Green Point, Port Jackson. Fos- 

 sil : Curdie's Creek, Muddy Creek (Victoria) ; River-Murray 

 Cliffs (South Australia). 



Micropcrella inversa, Waters. (PI. I. figs. 11, 12.) 



Forma inversa, Waters, Ann. & Mag. Nat. Hist. ser. 6, vol. xx. p. 190, 

 pi. iv. fig. 2.3, pi. V. fig. 6 ; Whitelegge, Proc. Linn. Soc. N. S, 

 Wales, ser. 2, vol. ii. p. 080. 



Much better specimens received from Green Point have 

 revealed several points not seen in the specimens previously 

 described. The pores on the front are distinctly stellate, as 

 can be readily seen in mature zooecia^ though not distinguished 

 in old cells without preparation, and the formation of these 

 stellate pores is instructive. 



At first raised tubes are formed (fig. 11, left-hand upper 

 zooecium), and in a later stage the stellate closure grows on 

 the top (fig. 11, right-hand zooecium) ; but as calcareous 

 growth progresses the teeth are at the base of a round 



