VINE : POLYZOA AND MICROZOA OF YORKSHIRE AND NORFOLK. 379 
one Ammonite alone I counted more than a dozen colonies, but I 
was unable to study these forms under the microscope on account of 
the size of the Ammonite, and in examining them by the hand glass, 
which was by no means satisfiictory, I might have overlooked several 
varieties, and the D. contractu Seeley, might be one of the forms that 
has not been previously recorded by me. It will be noticed in my 
list Proboscina species that one bears the name P. hunstantonensis, 
Vine ; evidently the Probiscina thus named is an ally of the present 
form. 
Habitat : On Terebratula, Inoceramus, Ammonites, and almost 
on every class of fossils referred to. 
24. Diastopora hunstantonensis, Vine. (Var. A.) tig. 8, Quart. Jour. 
Geol. Soc, p. 475, pi. xix., figs. 11a, lib. 
A well-marked variety of this beautiful species. 
Habitat : On Inoceramus and Terebratula 
25. Diastopora hunstantonensis, Vine. 
? Var. contracta, Seeley. Ann. Mag. Nat. Hist., Ser. iii., 
vol xvii., p. 181, 1866. 
Prof. Seeley remarks that the species which he has described as 
Berenicea contracta, "resembles Diastopora Clementina d'Orb. 
(Terr. Cret. v., p. 865, pi. 636, figs. 1, 2), of which it is a good 
variety. It is attached, orbicular, and has the cells arranged like an 
extended fan ; these are very distinct and narrow, being about twice 
as long in proportion to their width, as in B. Clementina, and con- 
tract from the point where they first appear, to the aperture, which 
is very small. This tapering character of the cells suffice to dis- 
tinguish it from all other forms." 
26. Diastopora foecunda, Vine. 
1885. Diastopora foecunda, Vine, Proc. Yorksh. Geol. Polytech. Soc, 
vol. ix., p. 9. 
1889. Diastopora foecunda, Vine, Ibid, vol. xi., p. 266. 
1890. Diastopora foecunda. Vine, Quart. Jour. Geol. Soc, vol. xlvi., 
p. 476. 
The Red Chalk form is rather larger than the one described in 
the Cambridge Greensand papers. 
Habitat : On a Water-worn piece of Chalk. 
