TERTIARY FORAMINIFERA OF VICTORIA. 21 



In the recent condition this form has a restricted geographical range. It 

 has been recorded from two locaUties off S. America out of a total of five. 

 As a fossil form How chin recorded it from both beds at Muddy Creek, where 

 in the Lower Series it is common. 



Occurrence. — Grice's Creek, frequent ; Balcombe's Bay, frequent ; Altona 

 Bay Coal-Shaft, frequent. 



SiGMOiLiNA CELATA, Costa sp. (Plate 2. fig. 41.) 



Spiroloculina celata, Costa, ]856, Atti Ace. Pontaniana, vol. vii. pt. la, pi. 26. fig. 5. 

 Planispirina celafa, Costa sp., Fornasini, 1885, Boll. Soc. Geol. Ital. vol. iv. p. 108 ; 

 Terrigi, 1891, Mem. R. Comit. Geol. Ital. vol. iv. pt. la, p. 67, pi. 1. figs. 5, 6. 



Costa's original specimens differ from the recent form named by Dr. Silvestri 

 S. Schliimhergeri, in having an angular contour and conspicuously marked 

 sutures ; whilst internally they show in transverse section that the chambers 

 are subcircular or subangular in outline, and these are arranged in a more 

 extended sigmoidal curve than those seen in S. Schlumbergeri. 



Our specimens are not so broad as the typical examples from the Italian 

 Tertiaries, but they, in all probability, belong to the same species. 



Occurrence. — Grrice's Creek, frequent ; Kackeraboite Creek, rare. 



SiGMOiLiNA Schlumbergeri, Silvestri. (Plate 2. fig. 42.) 



Planispirina celata (non Costa sp.), Brady, 1884, Rep. Chall. vol. ix. p. 197, pi. 8. figs. 1-4 ; 

 Flint, 1899, Rep. U.S. Nat. Mus. (1897) p. 303, pi. 47. fig. 5. 



8igmoilina Schlumbergeri, Silvestri, 1904, Mem. dell. Pontif. Ace. Romana d. NuoviLincei, 

 vol. xxii. p. 267. 



In the last mentioned work Dr. A. Silvestri has pointed out the previous 

 confusion of two forms under the one name, and further shows that the 

 original specimens of Costa are not referable to the species usually found in 

 recent deposits. Silvestri separates this latter form under the name of 

 S. Sclilumhergeri. The distinguishing characters of this species are the even 

 contour and inconspicuous sutures ; whilst internally the differences between 

 this and the preceding species are still more apparent in the rounded form of 

 the chambers and the strong sigmoidal curvature of the series. 



Occurrence. — Grice's Creek, frequent. 



Subfamily HAUERiNiNiE. 



Genus Planispirina, Seguenza. 



Planispirin-a exigua, Brady sp. (Plate 2. fig. 43.) 



Hauerina exigua, Brady, 1879, Quart. Journ. Micr. Sci. vol. xix. n. s. p. 53. 



Planispirina exigua, Brady, 1884, Rep. Chall. vol. ix. p. 196, pi. 12. figs. 1-4, and woodcut 



fig. 5^1 ; Howehin, 1889, Trans. R. Soc. S. Australia, vol. xii. p. 5; Millett, 1898, Journ. 



E. Mier. Soc. p. 611, pL 13. fig. 13. 



It is interesting to add this record to Howchin's previons one for thQ 



