ON CRETACEOUS POLYZOA. 389 
to characterise as ‘True Cambridge Greensand Polyzoa.’! In sepa- 
rating the two sets of Polyzoan remains I do not wish to enforce any 
classification of my own for the Cambridge beds; but only to make 
myself clearly understood as to my manner of procedure, and then leave 
the matter to paleontologists for acceptance or discussion, I will 
begin with the derived examples of Polyzoa first; and, as I know next 
to nothing about the phosphate or coprolite pits of Cambridge, it may be 
well to refer the student to several sections of these beds as given in the 
Memoir already quoted from, and which will be found on pages 35 to 38. 
Of ‘Coldham Common’ I have already quoted a passage from the 
same Memoir. 
III. Potyzoa or tHe CamBripck GREENSAND, OR PHOSPHATE Bens. 
Unattached forms (A). 
CycLostomata, Busk. 
1. Proboscina angustata, d’Orb. (Stomatopora gracilis (?), Vine, 
Cambr. Green., 1888). a 4 
: : Jambr.Greensand Papers, 
. Diastopora foecunda, Vine gts eae Pike Yorke. 
es es (congana ehace) Geol. Polytech. Soc.) 
Clementina, d’Orb. Ib. 
i megalopora, Vine, Ib. 
. Entalophora proboscidea, Edw. (var. raripora, d’Orb.), Ib. 
a var. elegans, Vine, Ib. 
* Jessoni, Vine, Ib. 
= neocomiensis, d’Orb. Ib. 
lineata, Beissel, Ib. 
», var. striatopora, Vine (Entalophora striato- 
pora, Vine, 1885). 
gigantopora, Vine, Cambr. Greensand Papers, 1885 
. 
at 
~~ 
. 
wt 
. 
HY 
SOON Dore sore 
rl 
bo 
and 1889. 
. Filisparsa ornata, Reuss, Ib. 
. Idmonea dorsata (?), Hag. Ib. 
. Truncatula repens (?), Hag. Ib. 
. Osculipora plebeia, Novak, Ib. 
. Domopora polytaxis (?), Hag. Ib. 
. Lichenopora radiata, Aud. Ib. 
19, Umbrellina (Lichenopora) paucipora, Vine, Ib. 
bet et et et 
CONT Od Ot > 09D 
Cuerrzostomata, Busk. 
20. Membranipora Dumerili, var. Cantabrigiensis, Vine, Cambridge 
Greensand Papers, 1885 and 1889. 
21. fA cretacea, d’Orb. Ib. 1889. 
22. + re var. Francqana, d’Orb. Ib. 
1 This was not, owing to a misprint, quite so clearly stated in the second of my 
two papers already referred to. The ambiguity was pointed out to me by Mr. Jukes- 
Browne. The passage referred to is at page 252: ‘The second group of Polyzoa are 
derived probably from erosion or denudation of rocks of the ages of the Cambridge 
Greensand and Lower Chalk.’ A portion of the passage had been erased in my 
original MS. after the word ‘derived.’ This erasure and the present note will, I hope, 
make matters clear. 
