382 REPORT—1890. 
Cretaceous Polyzoa since Professor Morris compiled his Catalogue. In 
the ‘ Catalogue of Cretaceous Fossils in the Museum of Practical 
Geology (1878)’ we have some good lists, and characteristic fossils 
are preserved in the Museum from the following formations : Neocomian, 
or Lower Greensand ; Blackdown beds; Upper Greensand; Lower and 
Upper Chalk; and there are still many undescribed Cretaceous Polyzoa 
in the cases and drawers of the Museum. In the Natural History 
branch of the British Museum, South Kensington, the Cretaceous 
Polyzoa are not fully arranged. There is a fine series here, but [ am 
not able to give fuil particulars. 
We owe to Professor J. Beete Jukes, as shown in ‘ The Student’s 
Manual of Geology,’ 1857, pp. 367, 368, and 495, indications of the 
stratigraphical distribution of the Cretaceous Polyzoa, epitomised from 
Pictet and d’Orbigny. It is useless in the present state of knowledge 
to reproduce these references, but it is well to direct attention to this 
early work of Jukes on the Palzeontology of the Polyzoa. 
I. Neocomran Potyzoa (Lower Greensand). 
In the ‘Catalogue of British Fossils’ a certain number of Polyzoa 
are characterised as Lower Greensand species by Professor Morris. 
Most of the species so placed are derived from the Faringdon beds of 
Berkshire. Mr. Jukes, however, did not use these Polyzoa, catalogued 
by Morris, as true Lower Greensand species, and he remarks (p. 502): 
‘There are... . some still unsolved difficulties with respect to these 
[so-called Neocomian beds], inasmuch as in some Greensand deposits at 
‘Blackdown, in Devonshire, fossils of the Lower Greensand, Gault, and 
Upper Greensand seem to be curiously intermixed in such a way as to 
make the age of the deposit very doubtful. There are also some sand 
and gravels near Faringdon in Wiltshire [Berkshire], where Lower 
Greensand fossils are also mingled with others belonging to Upper 
Cretaceous rocks. Mr. Sharp believed these Faringdon gravel-beds to 
be of more recent date than the Chalk itself, though still belonging to the 
Cretaceous period. .. As the fossils from these and from some other 
localities are often quoted as Greensand fossils, they are calculated to 
confuse our classification.’ 
Professor Prestwich, in his ‘ Geology,’ vol. ii., 1888, p. 271, refers the 
‘Faringdon Beds’ to the Upper Neocomian, with the following Polyzoa : 
Actinopora papyracea, Alecto Calypso, Pustulopora pseudospiralis, Cerio- 
pora (5 spp.), Diastopora (2 spp.), Hntalophora (2 spp.), and Reptomul- 
ticava (2 spp.). Also in H. B. Woodward’s ‘ Geology of England and 
Wales,’ 2nd edition (1887), pp. 375, 376, the ‘ Faringdon Beds’ hold their 
own as ‘ Lower Greensand.’ 
In the ‘Catalogue of Cretaceous Fossils in the Museum of Practical 
Gceology,’! most of the Lower Greensand Polyzoa have been derived 
from Faringdon, with but few exceptions, the chief of which are the 
following :—? 
1. Ceriopora polymorpha, Goldfuss, Upware. 
2. Echinocava Raulini, Michelin, Upware. 
3. Entalophora ramosissima, d’Orb., Lockswell. 
4, Radiopora bulbosa, d’Orb., Brickhill. 
5. Siphodictyum gracile, Lonsdale, Atherfield. 
1 Ed, 1878, pp. 6-7. ? I have omitted unnamed forms, 
