ON FOSSIL POLYZOA. 167 
ENTALOPHORA INCERTA, 0. sp. 
Zoarium very delicate, erect and ramose, branches varying in their 
character, from subcylindrical to cylindrical, but bulging at the nodes. 
Zoecia tubular elongated, or depressed, partially decumbent, occasionally . 
produced towards the distal extremity, opening on all sides; cells 
punctured. Oecia an inflation of the zoariwm or an inflated cell. 
Loeality.—Chalk detritus, Charing. 
This delicate species seems not to have been referred to by authors. 
From the Cretaceous rocks of Pulaski Co., Arkansas,’ I have a very 
similar species to the above, and I have not the least doubt but that the 
British and American forms may be considered identical. 
Under the genus Pustulopora, Blainv., Hagenow describes from the 
Maestricht beds ten species, and under Cricopora, Blainv. = Spiropora, 
Lamx., two species, some of which bear his own name, others are either 
Ceriopora or Pustulopora species, of Goldfuss or Blainville. In the 
Cretaceous Catalogue of Species in the School of Mines, only one is 
referred to Hntalophora (E. ramosissina, D’Orb.), and one to Spiropora 
(S. cenomana, D’Orb.). Besides the above, Professor Morris, and also 
Professor Phillips, add three others, none of which I can identify in 
my own collection. 
Genus Diastropora (Adnate), (part), Lamouroux. 
‘Zoarium adnate and crustaceous (or foliaceous), usually discoid, or 
flabellate, Jess commonly irregular in form. Zoecia tubular, with an 
elliptical or subcircular orifice, crowded, longitudinally arranged, in great 
‘part immersed.’—‘ Brit. Mar. Polyzoa,’ vol. i. p. 457. 
Our British Cretaceous Diastopora are, so far as I am aware, very 
limited in the number of species. In his ‘ Catalogue of Brit. Foss.’ Professor 
Morris gives the names of several, but I am only able to identify two 
species in the Lower Greensand—D. congesta, D’Orb., and D. papyracea, 
D’Orb. D. Sowerbii, Lonsdale, is not apparently a Diastopora, and D. ramosa, 
Mich., in Dixon’s ‘ Geo. of Sussex’ is a Stomatopora. I do not know the 
D. Wetherelli of Morris. I have therefore described below a very fine 
species from the Upper Chalk of Beachy Head (Miss Jelly’s collection) 
which I have provisionally named 
DIASTOPORA CRETACEA (n. sp. ? ). 
Zoarium adherent with a nearly circular outline, depressed in the 
central part, very much thickened at the edges by stunted (partially - 
grown) cells, but without basal lamina. Zowcia irregularly arranged, 
contracted towards the proximal and thickened at the distal extremities, 
separated by interspaces; orifice circular with a thickened peristome. 
Occia an inflated cell. 
Locality—Upper Chalk, Sussex (Miss Jelly’s Cabinet). 
The above is a true Diastopora, and specifically is very closely related 
to D. oolitica, Vine (‘ Quart. Jour. Geo. Soc.’ August 1881), only that in 
the Cretaceous species the cells are less crowded than in the Oolitic. The 
cells and cell-orifices are similar, but the question with me is whether it 
would be wiser to extend the description of D. oolitica so as to embrace 
the more recent type, or whether we should keep the types of the two. 
* Sent to me by my friend J. M. Nickles, of Cincinnati. 
