ON FOSSIL POLYZOA. 175 
the Upper Chalk, both in my own and in Miss Jelly’s collection. The 
patches are very small, but are not frequent. The Rev. Thomas Hincks 
(l.¢. p. 190), in giving its range in time says: ‘French Cretaceous 
deposits, D’Orbigny.’ 
Locality.—Upper Chalk, Beachy Head (?). 
Associated with this is the Diastopora cretacea (?) previously described. 
Family SELANARIID#, Busk. 
*“Zoarium free (?), orbicular or irregular, conical or depressed, 
convex on one side, and plane or concave on the other; composed of a 
single layer of cells, usually of two kinds, which open in the convex 
surface only.’-—‘ Crag. Polyzoa,’ p. 78. 
In this family Mr. Busk places the fossil species of Lnnulites, which 
range from the Crag to the Cretaceous epoch. As Mr. Busk gives full 
particulars of the family and genera, and a really good list—forty-four 
species—many of them Lunulites, I refer the student to it with pleasure, 
rather than give even an abridgement of his admirable notes (‘Crag 
Polyzoa,’ pp. 78-29). 
LUNULITES CRETACEA (?), Defranc (? D’Orbigny). So Busk. 
This is the only species known to me in the Chalk. Prof. Morris 
gives the following synonyms :— 
= L. urceolata, Woodward; = L. radiata, Mantell. 
Range from Lower Greensand to the Chalk. 
As the species of Polyzoa in the tabular list on p. 174 are given by Mr. 
Newton in his ‘ Catalogue of Specimens in the School of Mines,’ I make no 
apology for classifying them for the benefit of students. Pages in the 
Catalogue on which appear lists of Polyzoa, 6, 7, 39-49, 83-95. 
Part IT. 
CLASSIFICATION OF CycLostomaTouSs PoLyzoa, ETC. 
From the Silurian to the Cretaceous epochs only. 
Proressor Morris, F.G.S. 
1843. In his ‘ Catalogue of British Fossils ’ Professor Morris adopted 
the following arrangement for the varied groups of Polyzoa found in our 
British rocks. 
Fam. I. Escuaripz 
» I. CELLeporipz | =otetntmats, Bask, 
» LILI. Rereporips 
» LV. Crisipz 
» WV. MyRIAporIpz } =oysotomat, Busk. 
» WI. Tusutiporip# 
1844. Mr. Freperick M‘Coy. 
In M‘Coy’s works on British Paleozoic Fossils,! 1844, the Class Poly- 
z0a is divided into the following families :— 
Escharide (with 17 genera). Asterodiscide. 
Tubuliporide. Halcyonellide. 
Myriaporide. 
? Synopsis of the Carb. Foss. of Ireland, 1844,.and Brit. Paleozoic Foss. 
