FOKAMINIFEKA OF THE KERIMBA AECHIPELAGO. 557 



5 Stations. 



This beautiful little species occurs very sparingly at a few Stns., but the specimens 

 are very characteristic. At Stn. 3 a specimen was observed presenting the peculiar 

 sigmoid curve and compressed form characteristic of the species, but with a finely 

 striate test. 



22(1. Spiroloculina acutimargo Brady, 



SpirolucuVma acutimargo Brady, 1884, FC. p. 154, pi. x. fio-s. 12-15. 



Balkwill & Wright, 1885, DIS. p.^323, fig. 1 a-c. 

 Egger, 1893, FG. p. 222, pi. i. figs. 28-28. 

 „ „ Heron-Allen & Earlaad, 1913, CI. p. 24, pi. i. fig. 8. 



1 Station. 



A very finely-developed specimen at Stn. 11, exhibiting the characteristic lacunae at 

 the extremities of the chambers. 



2o. Spiroloculina Crenata Karrer. (PL XLl. figs. 6-8.) 



Spiroloculina crenata Karrer, 1868, MFKB. p. 135, pi. i. fig. 9. 

 „ „ Brady, 1884, FC. p. 156, pi. x. figs. 24-26. 



„ „ Egger, 1893, FG. p. 225, pi. i. figs. 42, 43, 



„ Millett, 1898, etc., PM. 1898, p. 265. 



9 Stations. 



Generally distributed, but never abundant except at Stn. 6. Nearly all the 

 specimens found represent the milioline form of the shell, spiroloculine specimens 

 occurring at a few Stns. only, and in very small numbers. It is noticeable that the 

 milioline form, which we figure, is always very much larger than the spiroloculine, 

 which, at Kerimba, is always very small. This would appear to show that the two 

 forms represent the dimorphic conditions of the species. If so, it is probable that 

 the milioline form, which is presumably microspheric, never assumes a spiroloculine 

 condition. 



MiLiOLiNA Williamson. 

 (Group of Jf. aVt'i«/«m.) 



24. Miliolina Circularis (Bornemann). 



TrilocuLina circularis Bornemann, 1855, FSH. p. 349, pi. xix. fig. 4, 



„ „ Jones, Parker, & Brady, 1866, etc., MFC. 1895, p. 121, pi. v. fig. 4. 



Miliolina circularis Brady, 1884, FC. p. 169, pi. iv. fig. 3, pi. v. figs. 13, 14(?), 

 „ „ Egger, 1893, FG. p. 235, pi. ii. figs. 61-63. 



Millett, 1898, etc., FM. 1898, p. 499, pi. si. figs. 1-3. 

 „ „ Heron-Allen & Earland, 1913, CI. p. 26, 



16 Stations. 



Almost universally distributed and often abundant, presenting as usual great range 

 of variation from Bornemann's neat original type into outspreading forms linking 



