112 Annals of the South African Museum, 



CRTSTELLARIA INTERMEDIA, Eeuss. 

 (Plate XV, fig. 10.) 



Cristellaria intermedia, Eeuss, 1845, Verstein. bohm. Kreideform.,pt. i, 

 p. 33, pi. xiii, figs. 57, 58 ; pt, ii, p. 108, pi. xxiv, figs. 50, 51. 



Altli, 1850, Haidmger's Naturw., Abhandl. iii (ii), p. 267, pi. xiii, 

 fig. 23. 



An. interesting species of the vaginuline or compressed forms of 

 Cristellaria, but having acute, or even keeled, margins. This is 

 typically a Cretaceous form, found in the Lemberg and Bohemian 

 Chalk ; variations of this species have been recorded by Eeuss * from 

 the Greensand (Cenomaniau) of New Jersey, and by Deecke t from 

 the Oxfordian of Moutbeliard, France. In the former the test is 

 inflated and the segments higher as in Eeuss' C. planiuscula, whilst 

 the latter has the series of chambers more closely inrolled. 



CRISTELLARIA SECANS, Eeuss. 



(Plate XV, figs, llrt, b.) 



Cristellaria secans, Eeuss, 1860, Sitzungsb. d. k. Ak. Wiss. Wien, 

 vol. xl, p. 214, pi. ix, figs. 7a, b. 



Cristellariae of the above type, with prominent and parallel sutural 

 ribs, are fairly common in the washings of the limestone from the 

 Lower Quarry, but in many cases so corroded that they can only be 

 generally identified as probably belonging to this species. The figured 

 specimen is a good example of Eeuss' C. secans, which that author 

 found in the Gault Clay of the Ehine. A variety of this species, 

 angulosa, has also occurred in the Folkestone Gault. 



FAMILY ROTALIIDAE. 



GENUS DISCOEBINA, Parker and Jones. 



DISCORBINA PILEOLUS, d'Orbigny sp. 

 (Plate XV, figs. 13, 6.) 



Valvulina pileolus, d'Orbigny, 1839, Foram. Anie'r. Mt'rid., p. 47, pi. i, 



figs. 15-17. 

 Discorbina pileolus, d'Orb. sp., Parker and Jones, 1865, Phil. Trans., 



* Sitzungsb. d. k. Ak. Wiss. Wien, vol. xliv, 1861 (1862), p. 336, pi. viii, 

 figs. 2 a, b. 



t Mem. Soe. d'Eumlation de Montbeliard, vol. xvi, 1886, p. 30, pi. ii, figs. 19, 

 19a. 



