VINE : POLYZOA AND MICROZOA OF YORKSHIRE AND NORFOLK. 387 
It must not be imagined, therefore, that this part of my paper 
is in any way exhaustive ; indeed our knowledge of the Microzoa of 
the Red Chalk is only in its infancy, but every little addition to that 
knowledge will help in a good work, and others may benefit by even 
a single record. As regards the Entomostraca my chief references 
will be to Prof. T. Rupert Jones' Monograph of Cretaceous Ento- 
mostraca;'" and to the Suplementary Monograph recently published 
by Messrs. T. R. Jones and G. H. Hinde.t In the 1849 Monograph 
only one species, Cytherella ocata, is recorded as derived from the 
Red Chalk of Flamborough : in the second Monograph none are 
recorded, not even the C. ovUa as above. I am, glad therefore, to 
be able to add to the Red Chalk list hve additional species. 
Genus Bairdia, M'Coy. 
1. Bairdia sub-deltoidea, Miinster. 
1849. Bairdia sub-deltoidea, Jones, Monog. Entom. Cret. p. 23, 
pi. v., fig. 15. 
1856. Bairdia sub-deltoidea, Jones, Monog. Entom. Tert., p. 52. 
1890. ,, „ Jones and Hinde, Monog. Entom. Cret. 
p. 5, pi. ii., figs. 31-34. 
A long list of synonyms and references is given by the authors 
in the last (1890) citation above, p. 5, to which the student is 
referred. The unique example which I place liere is more like the 
fig. 34 (right valve), pi. ii., (Monog. Entom. Cret., J. and H.), than 
any of the others in this, or in the earlier Monograph. 
Localities (Jones and Hinde). 
Chalk : Xorwich, Horstead, Colchester, and South East England ; 
Cave Hill (Antrim), and Ready Hill (Londonderrj^). 
Ckalk-rock : Dunstable and Luton (Bedfordshire) ; West Wycombe 
(Buckinghamshire) ; Chinnor (Oxfordshire). 
Chalk-Marl: Didcot (Berkshire) ; Detritus'. Charring (Kent). 
Red Chalk Hunstanton, Vine. 
Gault : Godstone (Surrey) ; Greensand : Cambridge and War- 
minster. 
2. Bairdia Harrisiana, Jones. 
* Palseontographical Soc, 1819, f Palgeontographical Soc, 1890. 
