Vol. 50.] MR. F. CHAPMAN ON THE BARGATE BEDS OF SURREY. 699 



21. Texttjlaria aggltjtinans, d'Orbigny. 



T. agglutinans, d'Orbigny, 'Foram. Cuba,' 1839, p. 136, pi. i. 

 figs. 17, 18, 32-34 ; Chapman, Journ. Roy. Micr. Soc. 1892, p. 329, 

 pi. vi. fig. 21. 



The specimens from the Bargate series are very small, but bear 

 all the characters of the above species. It is interesting to note 

 this form as occurring in the jSTeocomian beds, having been lately 

 found in the Gault, though previously unknown from beds older 

 than the Tertiaries. 



Three specimens from Pebble-beds, Littleton. 



22. Texttjlaria trochus, d'Orbigny. • 



T. trochus, d'Orbigny, Mem. Soc. geol. France, vol. iv. (1840) 

 p. 45, pi. iv. figs. 25, 26. 



This species is already known from Cretaceous and Tertiary strata. 

 The only isolated specimen found in the Bargate series is a replace- 

 ment of the test in green chalcedonic silica : but several examples 

 of the same species have been noted in thin sections of Bargate 

 limestone. All the specimens were from Littleton. 



23. Texttjlaria turris, d'Orbigny. 



T. turris, d'Orbigny, Mem. Soc. geol. France, vol. iv. (1840) 

 p. 46, pi. iv. figs. 27, 28. 



This species is also known from Cretaceous and newer strata. 



Two rather small specimens from Bargate Pebble-beds, Littleton, 

 measuring -Jg- inch (0-3 mm.) in length. 



Verneutlina, d'Orbigny. 



24. Yeriteuilina triquetra (Minister). 



Teoctularia triquetra, Miinster (in Romer's paper), Neues Jahrb. 

 1838, p. 384, pi. iii. fig. 19. 



Verneuilina triquetra, Brady, ' Challenger ' Rep. vol. ix. (1884) 

 p. 383, pi. xlvii. figs. 18-20. 



The Bargate specimens are very minute, being only y 1 ^- inch 

 (0*35 mm.) in length. The specimens which were found in the Gault * 

 measured about -^ inch (0'75 mm.), whilst Dr. Brady's measure- 

 ments of the same species are -^ to ^ inch (1 to 4 mm.) in length. 



Four specimens from Bargate Pebble-beds, Littleton. 



Tritaxia, Reuss. 



25. Tritaxia tricarinata, Reuss. 



Tr. tricarinata, Reuss, ' Verstein. bohm. Kreid.' pt. i. (1845) 

 p. 39, pi. viii. fig. 60 ; Reuss, Sitzungsb. Akad. Wiss. Wien, vol. xl. 

 (I860) p. 228, pi. xii. figs. 1, 2 ; Chapman, Journ. Roy. Micr. Soc. 

 1892, p. 749, pi. xi. fig. 1. 



This species, like the preceding, is characteristic of Cretaceous 



1 Chapman, Journ. Eoy. Micr. Soc. 1892, p. 329, pi. vi. fig. 24 a, b. 



