VINE : CAMBRIDGE GEEENSAND. 
21 
Zoarium obicular, centre depressed, cancelli small and sparse. 
Zocecia disposed in rays, and alternately long and short, but the rays 
rarely exceed twelve in number. 
Locality: Cambridge, Greensand. 
Apparently the single row of pores between the rows of cells 
are present in the Greensand specimen which I am describing, but 
these are partially overgrown by an incrustation of calcareous 
matter, imbedded in which is a small S^nrorbis. 
Genus Domopoea, D'Orb. 
Zoarium massive, cj^clindrical or mammiform, simple or lobed, 
formed of a number of sub-colonies super.-imposed one upon the 
other ; the whole surface porous. Zocecia dispose in radiating lines, 
consisting of one or more series, on the free extremity of the stem 
or lobes. (Hincks, Brit. Mar. Polyzoa, Vol. I., p. 481.) 
15. — Domopoea polytaxis (?) Hagenow. 
= Ceriopora id. Hagenow, Die Bryoz. der Maas. tr. Kreid, Tab. V., 
fig. 2. 
There are several specimens in the Cambridge Greensand 
material that I refer — but still Avith a doubt — to this species. The 
fragments are similar to those which I have from the Faxoe lime- 
stone, but the characters are not quite so well marked. One 
specimen that I formerly referred to Goldfuss' D. steUata, I have 
withdrawn after due consideration and comparing with the original 
figure in the Petrifacta as I think now that that was a wrong 
identification. 
Localities: Cambridge, Greensand ; Faxoe Limestone, Denmark. 
There are three species in my Cenomanien series that will afford 
ample material for special stud}' of the Domoporse of the Cretaceous 
rocks, especially so in connection with the Upper and Lower Chalk, 
and Greensand and Neocomian forms. These are Pelagia insignis 
Michelin ; P. JEudesii, Mich. ; and Domopora clavula, D'Orb. ; none of 
which are related to British Cretaceous species. 
Family FEONDIPOEIDiE, Busk. 
Zoarium massive, stipitate, simple or lobed, or ramose, Cells 
