720 ME. F. CHAPMAN ON THE BAKGATE BEDS OF SURREY. [Nov. 1 894, 



JDiscorbina rosacea, Brady, ' Challenger ' Rep. vol. ix. (1884) 

 p. 644, pi. lxxxvii. figs. 1, 4. 



This is also a shallow-water species, and it is found fossil in 

 various Tertiary beds. 



One specimen from the Pebble-beds, Littleton. 



118. Discorbina Bertheloti (d'Orbigny). 



Rosalina Bertheloti, d'Orbigny, ' Foram. lies Canaries,' 1839, 

 p. 135, pi. i. figs. 28-30. 



Discorbina Bertheloti, Brady, ' Challenger ' Rep. vol. ix. (1884) 

 p. 650, pi. Ixxxix. figs. 10-12. 



This species is, in the recent condition, usually found at depths 

 of less tban 500 fathoms. 



The forty-two Bargate specimens vary from yjs inch (0-14 mm.) 

 to -fa inch (0*42 mm.) in diameter. They were found in the 

 Pebble- beds, Littleton. 



119. Discorbina Bertheloti, var. Baconica (Hantken). 



D. Baconica, Hantken, Mittheil. Jahrb. ung. geol. Anstalt, vol. iv. 

 (1875) p. 76, pi. x. fig. 3 a, b. 



D. Bertheloti, var. Baconica, Bradv, ' Challenger ' Pep. vol. ix. 

 (1884) p. 651, pi. xc. fig. 1 a, b, c. 



This variety was described from the Clavulina Szaboi-beds (Ter- 

 tiary) of Hungary, and as a recent form is known from depths of 

 600 to 1180 fathoms. 



One specimen from the Pebble-beds, Littleton. 



120. Discorbina concinna, Brady. 



D. concinna, Brady, 'Challenger' Rep. vol. ix. (1884) p. 646, 

 pi. xc. figs. 7, 8. 



This species was recorded by Dr. Brady from depths of 15-620 

 fathoms. 



Two specimens from the Pebble-beds, Littleton. 



121. Discorbina rugosa (d'Orbigny). 



Rosalina rugosa, d'Orbigny, ' Foram. Amer. Merid.' 1839, p. 42, 

 pi. ii. figs. 12-14. 



Discorbina rugosa, Brady, ' Challenger' Rep. vol. ix. (1884) p. 652, 

 pi. lxxxvii. fig. 3 a, b, c • pi. xci. fig. 4 a, b, c. 



Seven specimens of this moderately shallow-water species were 

 found in the Pebble-beds, Littleton. 



122. Discorbina obttjsa (d'Orbigny). 



Rosalina obtusa, d'Orbigny, ' Foram. Foss. Vienne,' 1846, p. 179, 

 pi. xi. figs. 4-6. 



Discorbina obtusa, Brady, ' Challenger ' Rep. vol. ix. (1884) 

 p. 644, pi. xci. fig. 9 a, b, c ? 



This species is represented in the Bargate series by one typical 

 specimen from the Pebble-beds, Halfpenny Lane, Chilworth. 



