Dr. R. L. Sherlock — Foraminifera of Speeton Clay. 219 



Dg (upper part). Fragments of shells and crystals of selenite. 



Dg. No Foi-aminifera. 



D^. Small rod-like bodies, apparently glauconite casts. Quartz 

 grains. 



Dg. Small rod-like bodies as in D^ and occasionally a minute nodule 

 of pyrites. Foraminifera are rare and comprise an arenaceous form 

 and Cristellai'ia rotidata (Lamarck). 



Do (base). Some glauconite grains. A fair number of Foraminifera, 

 but the specimens are usually imperfect. Arenaceous forms are more 

 frequent in this than in any other zone examined. For the most 

 part they are very fragile and fall to pieces readily, and it is probably 

 this fragile character that causes them to be relatively rare in the 

 Speeton Clay. 



The following are the Foraminifera found and determined : 

 Bulimina sp., Cristellaria cultrata'i (Montfort), Pulvinulina caracolla 

 (lloemer). 



A number of small, nearly circular grains resemble arenaceous 

 Foraminifera, but examination in oil of cloves shows that there is 

 a radial crystalline structure and the grains appear to be concretions. 

 Mr. H. H. Thomas has kindly examined them for me and finds that 

 they are composed of gypsum. 



Dg (top). Some glauconite grains and a few poor specimens of 

 Foraminifera. 



Cjj. Abundant grains of glauconite, some, at least, being casts of 

 Foraminifera. 



CjQ. Foraminifera moderately abundant. The species are Lagena 

 glohosa (Montagu), L. apicidata, Reuss, Nodosaria [Gla?idulma) 

 IcBvigata, var, strobiltis, Reuss, Cristellaria gibba, d'Orb. There are 

 also present Ostracods, and grains of a red mineral which is probably 

 garnet. 



Cg, Foraminifera not numerous. They are Lagena apicidata i"^), 

 Reuss (broken), and Cristellaria rotulata (Lamarck). In addition 

 there ai'e fragments which appear to be Inoceramus prisms. As 

 Inoceraynns venustidus, Bean, is abundant at this horizon, it is \ev\ 

 probable that the fragments are derived from this mollusc. 



Cg (?). There is some doubt as to the horizon from which the 

 specimen was collected. In any case no recognizable Foraminifera 

 were obtained. 



C7. A fair number of specimens oi Pulvimdina caracolla (Roemer) 

 were obtained, all broken. 



C3 (upper part) ? I have not been able to obtain specimens of the 

 strata between C~ and tlie upper part of Cg, and the specimen from 

 the latter horizon is not free from doubt as regards its exact position. 

 It contains grains of glauconite and a considerable number of 

 Foraminifera. These are chiefly specimens of Pulvinulina caracolla 

 (Roemer), and are usually broken and filled with glauconite. 

 Cristellaria gibba, d'Orb., C. rotidata (Lamarck), and Pidvimdina 

 lamplughi, sp. nov., also occur, and these latter forms are not 

 broken. 



Cj (upper part) ? Here, again, there is^some doubt as to the exact 

 horizon of the material, and it is particularly unfortunate, since this 



