Report on Foraminifera. By F. W. Millett. 547 



Although described as a variety of B. Karreriana, it is equally 

 allied to B. Hantkeniana, and may be treated as a passage form 

 between the two. 



It is by no means uncommon, and occurs at several Stations in 

 both Areas. 



Bolivina Schtvageriana Brady, plate 1Y. fig. 10. 



Bolivina Schivageriana Brady, 1881, Quart. Journ. Micr. Sci., 

 vol. xxi. n.s. p. 58. B. Schwageriana Brady, 1884, Chall. Kept., 

 p. 425, pi. liii. figs. 24, 25. 



Of this very rare form, hitherto known only from the ' Challenger ' 

 examples, there are some fine specimens from Stations in both Areas. 

 They differ from the type in possessing a few delicate costae near the 

 peripheral margin, but in all the aperture is provided with a projecting 

 tongue. 



All that is known of its distribution elsewhere may be summed up 

 in Brady's words (Chall. Kept., p. 426) : " The figured specimens were 

 obtained, amongst others, from Humboldt Bay, Papua, 37 fathoms ; 

 besides which, a few somewhat doubtful examples have been found at 

 Station 185, off Kaine Island, Torres Strait, 155 fathoms." 



Bolivina reticulata Hantken. 



Bolivina reticulata Hantken, 1875 (1876), A magy. kir. foldt. 

 int. evkonyve, vol. iv. p. 56, pi. xv. fig. 6. B. reticulata (Hantken) 

 Brady, 1884, Chall. Kept., p. 426, pi. liii. figs. 30, 31. B. reticulata 

 (Hantken) Egger, Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. 

 p. 295, pi. viii. figs. 33, 34. 



This form is rather rare in the Malay Archipelago, although it 

 occurs at Stations in both Areas. Some of the specimens have the 

 peripheral margin rounded, as in the fossil examples ; in others it is 

 acute, as figured by Brady. 



Mimosina gen. n. 



Test typically spiral, conical or trochoid ; chambers arranged bi- or 

 tri-serially about the longitudinal axis. Aperture compound, con- 

 sisting of two distinct orifices ; one of them usually being a slit at the 

 base of the inner wall of the final chamber ; the other an opening 

 varying in shape and situated near the apex of the chamber ; the two 

 orifices frequently being connected internally by means of a bent tube 

 or septum. Shell-wall cellular or spongy. 



This is a collection of forms which, but for certain characters 

 they possess in common, might not only be assigned to the genera 

 Verneuilina, Bulimina, and Ehrenbergina, but to recognised species 

 in each of these genera. These distinguishing characters are the 

 compound aperture and the cellular structure of the shell-wall. 

 Something analogous to the first of these may be found in certain 



