VINE : POLYZOA OF THE LOWER AND UPPER GREENS AND. 269 
Habitat : Free ; Phosphate Beds : Attached on Pharetrospongia 
stra/ia?ii ; and on Ostra3 valve adherent to Radiolites Mortoni. 
Horizon : Camb. Greensand ; Phosphate Beds, Cambridge. 
17a. Diastopora fecnnda conjesta stage, D'Orb.), pi. xii., figs. 
10 to 10b. 
= D. conjesta and D. confluens, D'Orb, pi. (Terr. Cret.) 640, 
figs. 1-6. 
These figures are drawn from one of the most conspicuous of the 
apical (or young growths) of D. fecunda, Vine, and represents the 
D. conjesta stage of D'Orbigny. See plates in Atlas as above. 
18. Diastopora Clementina, D'Orb. 
1847. Diastopora Clementina, D'Orb, Prod. 2, p. 120, and Voyez. 
1852. Berenicea Clementina, D'Orb, Terr. Cret., v, p. 865, pi. 636, 
figs. 1-2. 
1872. Berenicea Clementina, Reuss, " Planers," p. 109, tab. 26, f, 8. 
I have examined, besides the small parasitic colony previously 
referred to above, two very fair examples of this species, and these 
are sufficiently characteristic to warrant their inclusion in this list. 
One of the examples have the cells more closely packed together than 
the other ; Zooecia faintly rugose ; Zoarium variable. 
Habitat : One on an Ammonite, the other on D. fecunda. 
Horizon : Phosphate Beds, Cambridge. 
19 Diastopora megalopora, Vine, Camb. Greensand Pap. p. 10, 
pi. ii., figs. 9-9c. 
This is a distinct type of Cambridge Greensand Diastopora, and 
its facial characters have been already depicted. One rather large 
example of the species, derived probably from the Chalk Marl, as 
well as showing some of the Zooecial characters referred to previously, 
give us a really good idea of the constancy of its typical features. 
Horizon : Phosphate Beds, Cambridge. (But derived fi'om 
Chalk Marl). 
(Diastopora confluens, Reuss, Camb. Greensand Paper, p. 10. 
On account of what has been already said in speaking of D. fecunda 
this species is suppressed, and D. Clementina substituted in 
its place). 
