VISE: FOSSIL POL VZOA : ADDITIONS TO THE CRETACEOUS LISTS. 153 
§ II. Gault Polyzoa. 
Neither in the Catalogue of British Fossils by Professor Morris, 
ed. 1854, nor in the Catalogue of Cretaceous Fossils in the Museum 
of Practical Geology, 1878, is there any mention of Polyzoa derived 
from the horizon of " what is ordinarily characterised as Gault. ' 
The only reference known to me will be found in Phillips' Manual of 
Geology, ed, 1885, pp. 589-590. The Pakeontological lists of Creta- 
ceous Fossils, including the Polyzoa, were compiled by Mr. Etheridge, 
and three Gault species are recorded, but unfortuately the British 
specimens cannot be traced." 
The species indicated in the list are as follows, the names are 
supplied to me by Mr. Etheridge himself : — 
1. Berenicea Clementina d'Orb. Pal. Fr., vol. v., p. 865, pi. 636, 
figs. 1-2. 
2. „ polystoma Rom. 1839. " Ool." pi. 17, fig. 6 and 
Kreide, p. 19. 
3. Ceribcava ramulosa, d'Orb. Pal. Fr., vol. v., p. 1017, pi. 788, 
figs. 11-12. 
= Choetetes ramulosus, Mich. Icon. Zooph., p. 202, pi. 51, 
fig. 5. 
The material on which I now rely was derived from Gault in 
situ, from two localities, Barnwell, Cambridge, and Folkestone. " 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 Cop- 
rolite bed at Coldham Common, and will see that the slope south- 
eastwards is much greater than can be accounted for by dip alone. 
Coldham Common, in fact, owes its formation to the existence of a 
hollow in the surface of the Gault, w T hich is here only between 110 
and 120 feet thick."f 
I have already, in two papers which were published in the 
Proceedings of this Society, (" Polyzoa of the Cambridge Greensand," 
* See Report on the Cretaceous Polyzoa (Vine), Brit. Association Reports, 
1890-91, p. 287. 
t Messrs. W. H. Penning and A. J. Jukes-Brown, in Geology of the Neigh- 
bourhood of Cambridge, p. 19, Mem. Geol. Survey. 
