14 Mr. A. W. Waters on Australian Bryozoa. 
kerensis, W., Micropora, Adeonella, Adeona, Steganoporella, 
Catenicella, and many others. 
Loc. Aigean Sea (#.); Florida, 35-43 fath. (Sm.) ; Green 
Point, Port Jackson. 
Lepralia Poissonii, Aud., var. (Pl. II. fig. 17.) 
For synonyms and localities see “Tert. Chil. Bryozoa from New Zea- 
land,” Quart. Journ. Geol. Soe. 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 zoccium. In L. Pois- 
sonit, as previously described, the ovicell is always raised, and 
it may bea 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 Escharide 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 “ cardelle.” 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. 
I 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 Smttia, dropping 
the genus Mucronella. Most of the Jucronelle would come 
in here, but a few would come under Lepralia, for the so- 
called mucro has evidently represented various structures. In 
