rv92 MESSES. E. HEEON-ALLEN AND A. EAELAND ON THE 



we have had the privilege of examining. The question therefore inevitably arises 

 whether D. concinna is not merely a stage in the life-history of Cymbalopora huUoides. 

 Another slight variation noticeable in the Keriniba specimens is in the peripheral 

 maro-in. According to Brady this should be acutely angular, but at many of the 

 Kerimba Stns. specimens are to be found with a rounded peripheral edge, due to the 

 fact that the inferior side is less markedly concave than usual. At Stn. \ X a few 

 individuals were observed growing attached to shell-fragments. 



342. DisCOrbina praegeri Heron-Allen & Earland. 



Discorbina praegeri Heron-Allen & Earland, 1913, CI. p. 122, pi. x. figs. 8-10. 



2 Stations. 



A few weak, but fairly typical, specimens only. 



343. DiscorMna isabelleana (d'Orbigny). 



Rosalina isabelleana d'Orbigny, 1839, FAM. p. 43, pi. vi. figs. 10-12. 

 Discorbina isabelleana Jones & Parker, 1872, FFE. p. 115. 



„ „ Brady, 1881-, FC. p. 646, pi. Ixxxviii. fig. 1. 



Egger, 1893, FG. p. 386, pi. xv. figs. 36-38. 



Heron-AUeu & Earland, 1908, etc., SB. 1909, p. 442. 



7 Stations. 



Common at the Stns., those at Stn. 11 being much the finer and better developed, 

 and tinged with colour. 



344. Discorbina vilardeboana (d'Orbigny). 



Rosalina vilardeboana d'Orbigny, 1839, FAM. p. 44, pi. vi. figs. 13-15. 

 Discorbina vilardeboana Jones & Parker, 1872, FFE. p. 115. 



Brady, 1884, FC. p. 645, pi. Ixxxvi. fig. 12 ; pi. ixxxviii. fig. 2. 

 „ Heron- Allen & Earland, 1913, CI. p. 112. 



1 Station. 



A few typical high-domed specimens at Stn. 11. The species was observed 

 elsewhere, but was not separated from I), mediterranenais. 



345. Biscorbina rosacea (d'Orbigny). 



Rotalina rosacea d'Orbigny, 1826, TMC. p. 273. no. 15, Modele no. 39. 

 Asterigerina rosacea d'Orbigny, 1850, etc., PP. 1852, vol. iii. p. 158. no. 2952. 

 Rotalia rosacea Parker, Jones, & Brady, 1859, etc., NE. 1865, p. 25, pi. ii. fig. 71. 

 Discorbina rosacea Brady, 1884, FC. p. 644, pi. Ixxxvii. figs. 1, 4. 



„ Egger, 1893, FG. p. 385, pi. xv. figs. 39-41. 



„ Herou-AUen & Earland, 1913, CI. p. 124, pi. xi. figs. 7-9. 



14 Stations. 



Occurs at most Stns., never abundant, and, as a rule, small and poorly developed. 

 Large and typical specimens were found in some number at Stns. 3 and 0, and less 

 irequently at Stns. S, "JX, and ? B. 



