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



kerensis, W., Mici'ojJora, Adeonella^ Adeona, Steganoporella, 

 Catenicella, and many others. 



Loc. ^gean Sea (/?.); Florida, 35-43 fath. {Sm.) ; Green 

 Point, Port Jackson. 



Lepralia Poissonii, And., var. (PI. II. fig. 17.) 



For synonyms and localities see " Tert. Cliil. Bryozoa from New Zea- 

 land," Quart. Journ. Geol. Soc. vol. xliii. p. 59. 



A specimen from Green Point is thickly calcified and has 

 the ovicells immersed, showing, however, a round ovicellular 

 area on a level with the wall of the zooecium. In L. Pois- 

 sonii, as previously described, the ovicell is always raised, and 

 it may be a question whether the specimen under notice should 

 be considered a variety or whether the difference arises from 

 a stronger calcification of older cells. The ovicells in the 

 Chilostomata generally are subject to considerable variation 

 with age, and great care must be exercised when using the 

 ovicell for purposes of classification. 



Smittia. 



I have several times expressed my conviction that the 

 classification of the family Escharidaj of Hincks would require 

 modification when better understood, and have considered 

 that some of the names were only used provisionally. 



A considerable section possesses three teeth, which, fol- 

 lowing Jullien, we may call a central " lyrula," and two 

 lateral " cardellse." !So far as I have had the opportunity of 

 examination, the opercula of all of these, instead of being hard 

 and horny, as in the majority of the Bryozoa, are soft and 

 membranous. The method of teasing out in water, which I 

 have found far the best for the separation of the opercula 

 generally, is not here suitable, as the opercula cannot be 

 removed without risk of altering their shape, and glycerine is 

 in this case useful, though as a rule it should be avoided. 

 This thinness of the operculum may not be found on further 

 examination to be universal, but at the same time the proba- 

 bility of the value of this as a diagnostic character is pointed 

 out. 



1 give under the present generic names figures of the teeth 

 of a number of forms magnified about fifty times, and believe 

 that they should be placed with the genus Smitti'a, dropping 

 the genus Miicronella. Most of the Mua-onellce would come 

 in here, but a i'ew would come under Lepralia, for the so- 

 called mucro has evidently represented various structures. In 



