268 Transactions of the Society. 



Mauritius, 225 fathoms, and from West Australia, 560 fathoms ;: 

 whilst the only 'Albatross' Station is off the Brazil coast, 10 19-' 

 fathoms. 



Uvigerina interrupta Brady. 



Uvigcrina interrupta, Brady, 1879, Quart. Journ. Micr. Sci., n.s. 

 vol. xix. p. 274, pi. viii. figs. 17, 18. U. interrupta Brady, 1884, 

 Chall. Kept, p. 580, pi. lxxv. figs. 12-14. U. interrupta (Brady) 

 Egger. 1893, Abhandl. k. bayer. Akad. Wiss., CI. II. vol. xviii. 

 p.^313, pi. ix. fig. 58. 



This appears to be nothing more than an attenuated form of 

 U. ampullacea, and the gradation from one to the other is well 

 shown by the Malay specimens. 



It is plentiful at Station 25 in Area 2, and occurs, but very 

 sparingly, at a few Stations in Area 1. 



Brady says it has only been observed in the South Pacific, 

 and names six localities, the depths varying from 37 to 1375 

 fathoms. 



Egger gives two ' Gazelle ' Stations, both off the coast of West 

 Australia, at depths of 196 and 650 fathoms. 



Uvigcrina auheriana d'Orbigny var. glabra var. n., 

 pi. V. figs. 8, 9. 



Uvigcrina auberia7ia 6! Orhi^ny, 1839, Eoram. Cuba, p. 106, pi. ii. 

 figs. 23, 24 U. auheriana (d'Orb.) Goes, 1882, K. Svenska Vet.- 

 Akad. Haudl., vol. xix. p. 60, pi. iv. figs. 71-75. 



The Malay examples of this form are more compressed and 

 neater than those from the West Indies described by d'Orbigny ; 

 they also differ in having the surface of the test quite smooth, but 

 they agree in the more important character of being biserial. The 

 elongated form (fig. 9) differs from Bolivina only in the form of 

 the aperture. It closely resembles the figures of U. Parkcri given 

 by Karrer,* but he does not state that his species is biserial. 

 Brady in his 'Challenger' Eeport makes U. auheriana a variety 

 of U. asperula ; if this diagnosis were accepted the Malay form 

 would have to be treated as a compressed biserial variety of U. 

 canariensis, but taking surface ornamentation as being of less 

 value than the mode of aggregation of the chambers, it seems 

 more natural to group together the biserial varieties. 



Goes, writing of U. auheriana from the Caribbean Sea, says, 

 " Our form is often more smooth and more slender than d'Orbigny's 

 — also from the West Indies." These, it will be observed, are pre- 



• Abhandl. k. k. geol. Eeichs., vol. ix. 1877, p. 385. 



