386 VINE : POLYZOA AND MICROZOA OF YORKSHIRE AND NORFOLK. 
1890. Hippothoa simplex, Vine, Q. J. Geol. Soc, vol. xlvi, p. 48G, 
very rare in the Red Chalk. 
Habitat : On Inoceramus, Red Chalk, Hunstanton. 
In my Monograpli of the Polyzoa of the Red Chalk" of Hun- 
stanton 1 have only catalogued 43 species and varieties, the additional 
5 species or varieties in this paper are made up chiefly from the 
identifications of other authors, which, I consider it would be unwise 
to suppress. 
III. Entomostraca. 
When examining the material sent to me by Mr. .lesson, ever}^ 
now and again I came across fragments of broken chalk, or broken 
shell, on which were examples of either Ostracoda or Foraminifera. 
At least four or five species were found in this way, but as I did not 
intend to work out these two groups when I had the polyzoa paper 
in hand, I returned the attached forms to Mr. Jesson with the other 
unused fossils. Most of the Entomostraca, so far as I remember, 
belonged to the Gytherella and probably Bairdia gToups, and the 
Foraminifera were Lituoli and Cristellaria species. Among the rest 
of the material sent to me was a small box of powdered fragments of 
Red Chalk from the top layer of the Hunstanton bed. This I 
reserved for the purpose of manipulation, and after w\ashing and 
sifting I w^as able to pick out the Microzoa, wdiich w-ill be described 
in this part of my paper. Neither Foraminifera nor Entomostraca 
were in any abundance, in many cases the examples that w411 be 
referred to are unique. Occasionally I came across a small fish tooth 
or a minute fragment of Echinodermata, spines chiefly, which I am 
not able to describe, but their presence may receive a passing notice. 
Thin sections of the Red Chalk of Speeton and Hunstanton, together 
with sections of White Chalk from the layers which overlay the Red 
Chalk of Speeton and Hunstanton have been carefully prepared and 
examined for the purpose of studying the dilference between the red 
layers of Norfolk and Yorkshire. Examples of the Lincolnshire 
Red Chalk I was not able to get. 
* Quart. Journ. Geol, Soc, vol xlvi., 1890. 
