Gaiilt Foraminifera from Ford, Bucks. 



239 



MiLiOLiD.E. — Miliolina vennsta is the commonest species 

 of the porcellanous group in the Gault of Ford. The common 

 occurrence of Spiroloculina nitida is noteworthy, as it is very 

 rare at Folkestone ; Chapman records only one specimen from 

 the Upper Gault. The porcellaneous Foraminifera from 

 Folkestone seem practically to be confined to the Upper Gault. 



AsTRORHiziD^. — No representatives of this order have been 

 found at Ford. The tests of many members of the group are 

 incoherent, and this may account for their absence. It should 

 be noted also that the Gault of Ford has been moved, during 

 working, from its original position. 



LiTUOLiD.E. — This group is not abundant in individuals, 

 though several species occur. The commonest form is Hap- 

 lophragmium acntidorsatimi. One of the rarer species, Haplos- 

 iiche sherborni, occurs at Folkestone only at the top of the 

 Gault ; thus its occurrence in the Lower Gault of Ford extends 

 the known range of this form. Reophax scorpiuriis also is 

 restricted to the Upper Gault of Folkestone, but has also been 

 recorded from the Speeton Clay of Yorkshire (R. L. Sherlock, 

 Geol. Mag., 1914, p. 221). 



TextulariiDvE. — The genus Textularia is represented at 

 Ford by seven species, but individuals are not common. Buli- 

 mina orbignyi is the most abundant species, occurring in large 

 numbers ; at Folkestone it is common only in the Upper Gault. 



Lagenid^. — This order includes by far the largest number 

 of species found at Ford, as also at Folkestone. The genus 

 Lagena is only sparingly represented. The Nodosariae com- 

 prise 31 species, of which N. obscura and A^. paupercula are 

 most abundant in individuals. N. farcimen, N. soliita and 

 N. raristriata are restricted to the Upper Gault at Folkestone, 

 but occur in the Lower Gault at Ford. A^. calomorpha, which 

 is found at Ford, is not recorded from Folkestone, but occurs 

 in the Speeton Clay of Yorkshire. The Frondiculariae are not 

 abundant in individuals, though ten species occur. Rhabdog- 

 oniiim is represented at Ford by two species which have been 

 found only in the Upper Gault at Folkestone. Vaginulina is 



1921 July 1 



