The Foraminifera of the Older Tertiary of 

 Australia (No. l, Muddy Creek, Victoria)^ 



By Walter Howchin, F.G.S. 

 [Read October 4, 1888.] 



Plate I. 



The Older Tertiary beds exposed on Muddy Creek consist of 

 two main divisions, sharply distinguished in their pala3ontological 

 as well as their stratigraphical features.* In the following list 

 those species which only occur in the Lower Bed are indicated 

 by an asterisk (*). Those peculiar to the Upper Bed are marked 

 with a dagger (f). 



FAMILY MILIOLID.E. 



Genus — Biloculixa, cVOrhigny. 



1. B. ringens, Lamk. Not common in Lower Bed, but in- 

 clude some very large examples. Upper Bed, rather scarce. 



2. B. deiwesa, d'Orb. Most of the specimens possess flaps at 

 the aboral extremity, as show^n by Mr. Brady in "Challenger" 

 Report, but those from Muddy Creek have these appendages much 

 larger than the one figured by Mr. Brady, Lower Bed, rather 

 scarce, as also in Upper Bed. 



3. *i?. irreynJaris, d'Orb. These exhibit great diversity of form^ 

 some being much depressed laterally, whilst others in their sub- 

 globular outline approach very near to B. spliaera. The aperture 

 is generally a curved gaping slit without tongue. Lower Bed^ 

 rather scarce. 



4. B. eJongata, d'Orb. Lower Bed and Upper Bed, rare. 



5. t^. bulloides, d'Orb. The examples of this species are few 

 in number, but of large size, and are distinguished by very large 

 stelate apertures. Mr. Brady (" Challenger" Report) has shown 

 that J5. S2}haera, d'Orb., sometimes possesses alabyrinthic aperture, 

 especially in the case of deep water examples. In the present in- 

 stance the aperture is not labyrinthic, but exhibits strong l)ars of 

 shell substance radiating from the centre to the outer margin of 

 the oral aperture. Upper Bed, rare. 



6. \B. sp. A large sjoecies of BiJocuHna, possessing thick lon- 

 gitudinal costa? which are rendered still more conspicuous by a 

 slight weathering of the test, was obtained from the Upper Bed ; 



*Dennant, Roy. Soc. S. Aust., vol. xi.. p. 30, et sen.; Tate, Roy. Soc, 

 N.S.W., 1888, p. 242. 



