82 
VINE : CLASSIFICATION OF THE PALEOZOIC POLYZOA. 
Stomaiopora, — several species, but Upper Silurian only. 
Berenicea / Probably in Silurian rocks. 
Khopalonaria, Upper Silurian and Carboniferous. 
Entaloplwra, Species, Upper Silurian. 
Fenestella, Silurian to Permian. 
Polypora, Silurian and Carboniferous. 
Septopora, „ „ 
Stictopora, = Ptilodictya, Lonsdale and Vine, Upper Silurian . 
Phyllopora, Lower Silurian and Permian. 
Ptilopora, Carboniferous. 
Goniocladia, „ 
Tha7nniscus, Upper Silurian, Carboniferous and Permian. 
Pinnatopora, Lower Silurian and Carboniferous. 
Glauconome, Lonsd., Upper Silurian. 
Acantliodadia, Permian. 
Synocladia, Permian. 
Mr. Ulricb retains Hemitrypa, Phillips, but Mr. G. W. Shrubsole* 
lias already shown, from the examination of type species, that so far 
as British examples are concerned, Hemitrypa is an untenable genus, 
and cannot stand. The whole of these genera are given as Cyclos- 
tomatous in the 1882 paper of Mr. Ulrich, but I cannot say whether 
he will retain the same sub-division for the emended grouping. So 
far as my own experience goes, only a few of the genera given above 
can be so placed, but before a satisfactory arrangement can be made, 
typical species of every genus will have to be described by sections, 
both of the Cells and of the Zoarium, in accordance with the now 
general mode of dealing with minute structures in other groups of 
fossil organisms. 
IL Sub-order Cryptostomata, Vine. 
In my fourth Report, (British Association, 1883). I gave a des- 
cription of the minute structures of a species of so-called Ptilodictya, 
Lonsdale. It is well known that Lonsdale indicated that his genus 
and species were similar to, if not identical with Flustra lanceolata, 
Goldf. In all probability this was an error, as the small specimens 
selected by me for P. Lonsdalei do not correspond with Goldfuss's 
* Quart. Jour. Geol. Soc, 187^, pp. 281-2. 
