254 VINE : POLYZOA OF THE LOAVER AND UPPER GRKENSAND. 
am able I will endeavour to supply this faunal deficiency in the 
present review. 
The species of Polyzoa enumerated in the Catalogue of the 
School of Mines''' refer to examples in the cases of that Institution ; 
and as these are accessible for the purposes of identification or study, 
they, as a matter of course, form the groundwork of my present 
arrangements. In the cases referred to there are many examples, 
but at least 22 or 23 species are catalogued from the Lower, and 18 
or 19 from the Upper Greensand. There are none catalogued from 
the Gault ; only four or five, but unnamed, from the Blackdown 
beds ; none from the Cambridge Greensand, Chloritic Marl, or Red 
Chalk ; and only two from the Lower Chalk. The hst of Cretaceous 
Polyzoa in Prof. Morris's Catalogue of British Fossilsf is much 
fuller for some horizons, and Morris's list appears to be repeated in 
Phillips' work on the Geology of Oxford and the Valley of the 
Thames. 
In the Rev. W. Downes' paper on the Zones of the Blackdown 
Beds^ the author names the following Polyzoa : — 
Heteropora dichotoma (Blainv.) ? 
,, cryptopora, Goldf. 
Ceriopora gracilis, Goldf., and 
Radiopora bulbosa, D'Orb. 
The same species, except the last, with others, which are identi- 
fied as Multicrescis, D'Orb., are found also in the Haldon Rocks of 
Devon, but are almost indistinguishable on account of the secondary 
incrustations which obscure the delicate cells of the Polyzoa. Fair 
examples, however, of the Haldon species are in my own Cabinet. 
Mr. C. J. A. Mayer in his paper on the Cretaceous Rocks of 
Beer Head|| states that Bryozoa occurs in several of the beds 
examined by him. Thus at Peak Hill (Blackdown Beds ?) Bryozoa 
was found, (p. 372). Several species were also found at Beer Head 
and Dunscombe, in what corresponds to Warminster Beds and 
* Cat. of Cretaceous Fossils, 1878. 
t Ed. 1854. 
X Quart. Journ. Geol. Soc , Feb. 1882, pp. 75-94. 
II Ibid, Tol. XXX., pp. 369-393. 
