270 VINE : POLYZOA OF THE LOWER AND UPPER GREENSAXD. 
20. Umbrellina paucipora, Vine. 
= Lichenopora ? paucipora, Vine, Quart. Jour. Geo!. Soc, 
Nov., 1884, p. 853, with fig , drawn by Mr. Busk. 
= Lichenopora? paucipora. Vine, C. Gr. Pap., p. 11. 
There is no species in the whole of the Cambridge collection that 
I have had more bother with than the above. At the time I wrote 
the above papers I was not familiar with lleuss's peculiar genus 
Umhrellina , which the author established for the reception of one 
species only. In the classification of Keuss (1872, Bryoz. <S:c., des 
unteren Planers) the genus is placed in the Fam. Entalophoridi\). 
The species is named U. Stelzneri, Reuss, and in company with his, 
other peculiar forms are suggestively placed. 
? Clypeina tubseformis, Lonsd. (Dixon's Geol. Sus.), and 
. ? ,, marginoporella, Mich. Icon. 
The British examples differ materially from the U. Stelzneri, 
Rss., more especially in the longitudinal aspect. The disk-like upper 
part is also different, and if it be not sufficiently distinct to be 
recognised as a new species, it is, at least, a variety of Reuss's species, 
rather than identical with it. 
Horizon : Phosphate Beds, Cambridge. 
21. Oscnlipora plebeia Novak., Vine, Camb. Gr. Pap., p. 13. 
Examples of this species are very abundant in the Cambridge 
material, but I have not been able, however, to establisli all the 
variations of form which Novak depicts, neither have I found any 
examples bearing ovicells. 
Horizon : Phosphate Beds, Cambridge ; Bohemia, Novak. 
§ Rectangulata, Waters. 
22. Domopora polytaxis, Hag. Vine, Camb. Gr. Paper, p. 12. 
Horizon : Phosphate Beds, Cambridge. 
23. Lichenopora compressa ? D'Orb., pi. xii., figs. n-12a. 
1852. Discocavea compressa, D'Orb., Terr. Cret., t. v., p. 961. 
Lichenopora compressa, D'Orb., pi. 645, figs. 5-8. 
In some respects, particularly in the lines of growth as repre- 
sented in the figures of D'Orb , the Britisli form resembles the Seno- 
nien as given, figs. 5, pi. 645. There are ample varietal differences 
in the two I will admit, but from one poor example it is difficult to 
make out the necessary details so as to establish a variety. 
