VINE : NEW OR BUT LITTLE KNOWN EOCENE POLYZOA, 
57 
Hab. : Mediterranean on shell (H.M.S. 'Porcupine;' Blainville, 
MicheliD, d'Orbigny) Fossil: Miocene : Astezan, Asti, Vau- 
cluse. 
In his Bruccoli paper* Mr. A. W. Waters says, respecting 
Discoporella mediterranea (p. 18), "In the material collected by 
Dr. Fuchs from Bruccoli, there are a few fragments adnate and one 
stipate. and it would seem that the mode of growth should not be 
used as a generic character. This view would lead to the addition of 
Defrancia to Discoporella, and as this is a very variable species it 
seems possible that Defrancia lucernaria, Sars (see Busk Op. cit. Brit. 
M. C, pt. iii, p. 36, pi. 33, fig. 3), is only a variety. The cells of the 
rays are in some much raised, in others the rays are less distinct." 
A similar opinion is expressed by Mr. Waters in his remarks on the 
same species as found at Naples (Ann. Mag. Nat. Hist. (5 iii.), 1879, 
p. 277). Besides these references Dr. Pergens, in his papers on the 
(Pliocene Bryozoen von Rhodos, p. 11., 1887, Bryozoa Nord-oiiest 
Medt., p. 11, Bull. Soc. Roy. Malcol de Belg., 1889), partially des- 
cribes this peculiar species, and Seguenza (Form. Terz. Reggio, 
pp. 330-372), refers to it twice, f Under present circumstances then, 
although I believe that the species may be placed here, it may be 
best to bracket the specific name, but I advise that a careful search 
should be made when comparing Barton Clay fossils for better 
examples than the one that has been so feebly described above. 
British Horizon : Eocene, Barton Clay. 
1851. Genus Ditaxia, Hagenow. 
The genus Ditaxia was founded by Hagenow for the reception 
of the following peculiar species previously described by Goldfuss. 
Ceriopora anomalopora, Goldf, " Petrifacta," p. 33, pi. 10, fig. 5. 
„ compressa, ,, ,, p. 37, pi. 11, fig. 4. 
Only the first of these is taken by Dr. Ed . PergensJ and accepted 
as the type of Ditaxia ; the second is a Mesenteripora. The zoaria 
are in double layers simple and creeping, double and free, bearing on 
* Bryozoa (Polyzoa) from the Pliocene of Bruccoli (Sicily). Proc. Man- 
chester Geol. Soc, 1878-9. 
t See Miss E. C. Jelly's " Synon. Cat. of Marine Bryoz., p. 136, No. 884. 
X Rev. des Bryoz. du Cret. , p. 337. 
F 
