ON CRETACEOUS POLYZOA. 387 
work up the history of the material sent tome. In April 1889 I wrote 
to Mr. Edwin Hall, of Louth, the real discoverer of the polyzoon. He 
wrote to me immediately and sent me his three remaining fragments. 
He also forwarded to me a list of Neocomian Foraminifera collected by 
him at Louth. In his letter, he said that most of the Polyzoan material 
gathered by him was sent to the Geological Museum, Jermyn Street. 
After this I wrote to Mr. E. T. Newton, who, in reply to my letter, 
enclosed answers from Mr. Rhodes respecting Mr. Hall’s material; and 
subsequently another letter followed on the same subject from Mr. A. J. 
Jukes-Browne, but none of them could find this Neocomian material. ~ 
II. Poryzoalor tHe GavLt. 
Neither in the ‘ Catalogue of British Fossils,’ by Professor Morris, 
nor in the ‘ Catalogue of Cretaceous Fossils in the Museum of Practical 
Geology,’ is there any mention of Polyzoa from the horizon of the Gault. 
In Mr. Etheridge’s list, however, already quoted,! four (?) species of 
Polyzoa from this horizon are recorded. Excepting one species, I have 
been unable to trace where the others are alluded to or described ; and, as 
I wanted to make this report as complete as possible, I went to London 
in June last for the purpose of finding out all I could abont these Gault 
species. I was informed, both by Mr. R. B. Newton and Mr. Etheridge, 
of the Museum of Natural History, Cromwell Road, that there were no 
Gault forms in that museum. Since my visit Mr. Etheridge has kindly in- 
formed me that the following are three of those mentioned in the new 
edition of Phillips’s ‘Manual ’— 
Berenicea (Diastopora) Clementina, d’Orb. Pal. Fr. vol. v. p. 865, 
pl. 636, fig. 1-2. 
Berenicea (Aulopora) polystoma, Rém. 1839, Ool. pl. 17, fig. 6; aud 
Kreid. p. 19. 
=Diastopora gracilis, d’Orb. 1850 (Berenicea polystoma, 
d’Orb. 1852), p. 863. 
Ceriocava ramulosa (Ceriopora), d’Orb. [1852], Pal. Fr. vol. v. p. 
1017, pl. 788, fig. 11-12. ; 
(Cheetetes ramulosus, Mich., 1845, Icon. Zooph. p. 202, 
pl. 51, fig. 5.) 
Unfortunately these British specimens cannot be traced. 
Through the kindness of Mr. Jesson I have been able to examine a 
small collection of fossils from Barnwell, Cambridge. The shells are 
rather brittle and require careful handling; but the Polyzoan remains 
stand out very well on the rough coatings of the shells; and the shells 
themselves have a matrix of blue clay to support them. Of the locality 
of the fossils, Messrs. W. H. Penning and A. J. Jukes-Browne write as 
follows: ‘ At Cambridge Station and along the East Road the Gault is 
shown to be 120 to 130 feet thick in wells, but at Barnwell it is said to 
be 140 to 150 feet. Any one who stands on the surface of the Gault at 
Barnwell will have little doubt about its being higher than the coprolite 
bed at Coldham Common, and will see that its slope south-eastward is 
much greater than can be accounted for by dip alone. Coldham Common, 
? Phillips, Manual of Geology, vol. ii. 1885, pp. 89-590, 
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