rOEAMINIFEEA OP THE KERIMBA ARCHIPELAGO. GG5 



275. Lagena wrightiana Brady. 



Lagena wrightiana Brady, 1879, etc., RRC. 1881, p. 62. 



Brady, 1884, FC. p. 48:2, pi. Ixi. figs. 6, 7. 

 Egger, 1893, FG. p. 334, pi. x. figs. 42, 43. 

 Millelt, 1898, etc., FM., 1901, p. 622. 



7 Stations. 



■ Occurs at a few Stns., often frequent. In its most typical form L. wrightiana 

 presents no difficulties in identification, the surface of the test being ploughed with 

 more or less parallel grooves, often disappearing towards the middle of the test, which 

 presents a clear spot. Large specimens, however, often suggest an affinity to 

 L. radiato-marginata which is difficult to account for, as the structure of the test is 

 normally quite different in that species, the markings in which are not superficial but 

 tubular processes in the thickness of the shell-wall. Whether the grooves or channels 

 in the surface of L. wrightiana ever become enclosed by a lamina of shell-substance 

 we are not in a position to say, but the appearance of many specimens suggests some- 

 thing of the kind. Such a slight modification of structure separates two forms which 

 are at present regarded as specifically distinct. L. wrightiana occurs most abundantly 

 at Stn. 1, less frequently at Stns. 3 and 11. The specimens exhibit great variety in 

 size, contour, and strength of markings, which in some cases bifurcate as in the 

 Malay specimens recorded by Millett. The size of the central smooth space varies 

 enormously — in some cases it occupies nearly half the area of the shell, whilst in 

 others it is almost entirely lacking. 



276. Lagena lagenoides (Williamson). 



Entosolenia marginata, var. lagenoides Williamson, 1858, RFGB. p. 11, pi. i. figs. 25, 2G. 

 Lagena lagenoides Reuss, 1862, FFL. p. 324, pi. ii. figs. 27, 28. 



Brady, 1884, FC. p. 479, pi. Ix. figs. 6, 7, 9, 12-14. 



Balkwill & Millett, 1884, FG. p. 82, pl. ii. fig. 11. 



Brady, Parker, & Jones, 1888, AB. p. 223, pl. xliv. fig. 23. 

 „ „ Millett, 1898, etc., FM. 19U1, p. 623, pl. xiv. figs. 8, 9. 



1 Station. 



One small but typical specimen at Stn. 3. 



277. Lagena Mcarinata (Terquem). 



Fissurina bicarinata Terquem, 1882, FEF. p. 31, pl. i. (ix.) fig. 24. 

 Lagena bicarinata Balkwill & Millett, 1884, FG. p. 82, pl. ii. fig. 4 ; pl. iii. fig. 9. 

 „ Balkwill & Wright, 1885, DIS. p. 342, pl. xii. fig. 30. 

 * „ Millett, 1898, etc., FM. 1901, p. 624, pl. xiv. fig. 13. 

 „ ,. Sidebottom, 1904, etc., RFD. 1906, p. 13, pl. ii. figs. 13-15. 



„ „ Sidebottom, 1912, etc., LSP. 1912, p. 419, pl. xix. Hg.<. 25-27, pl. xx. 



fig. 1; 1913, p. 197, pl. xvii. tig. 18. 



