262 VINE : POLYZOA OF THE LOWER AND UPPER GREENSAND. 
well marked, but the present species must not be confounded with 
others of the class. 
Horizon : Phosphate Beds, Cambridge. 
8. Entalophora neocomiensis (?), D'Orb. 
=Entalophora neocominensis (?) (error), C. G. Pap. 7, pi. i., fig. 4. 
1852. ? Entalophora neocomiensis, D'Orb., Terr. Cret., p. 782, 
pi. 616, figs. 15-18. 
This species is not abundant in the Cambridge material, but I 
am not certain that I should be justified in removing the (?) from 
the name. I have compared my own with D'Orbigny's figure and 
description of E. neocomensis, D'Orb., and I am not satisfied that the 
two are identical. 
Horizon : Phosphate Beds, Cambridge. 
9. Entalophora gigantopora, Vine, C. G. Pap., p. 8, pi. i., fig. 3. 
Since the account in my former paper was written I have 
re-examined the fossil referred to (p. 3). On a fine example of 
^Pharetrospongia stmhani, Sollos, I have found a decumbent colony 
of what I believe to be the early stage of this species . The cells are 
large, similarly arranged, and the colonial growth covers fragments 
of the network of the sponge. At some of the places in the sides 
of this Prohoscina stage there is evidence that portions of the 
Zoarium became free, and erect, and thus the flattened form passed 
into another, a Bi-Diastopora, or an Entalophoridian stage. All the 
examples that I have heretofore found free are apparent^ broken 
from these erect lateral growths, and until now the Prohoscina stage 
of this large Zooecial form has escaped notice." 
Horizon : Cambridge Greensand Phosphate Beds. Free forms. 
10. Stomatopora Hnearis, D'Orb., Terr. Cret., t. v., pi. 629, figs. 5-8. 
Var. MoRTONi, var. n, pi. xii., figs. 1 to Id. 
Stomatopora linearis, D'Orb., and S. rugidosa, Reuss, in some 
respects resemble the Cambridge Greensand form, but from the 
descriptions of D'Orb it is impossible to place the British variety 
under either name without remark. 
Zoar ium linear, or slightly flexous : unbranched. Zocecia, long, and 
* Recently I have found a similarly decumbent form in the Red Chalk, 
which I have named Prohoscina gigantopora, Vine, 
