Juiy,"j Chapman, Notes on Foraminifera and Ostvacoda. 49 



NOTES <)N FORAMINIFERA AND OSTRACODA FOUND 

 IN A SAMPLE OF SAND AT WILLI AMSTOWN 

 BEACH. 



(With Figures.) 

 By F. CHAPMAN, A.L.S., Palaeontologist, National Museum, 



Melbourne. 

 {Read before the Field Naturalists' Club of Victoria, 12th April, 191 5.) 

 A small quantity of sand, about a quarter of an ounce, was 

 taken from tide-streaks on the occasion of the Club's excursion 

 to Williamstown. The following notes were made on the 

 material, and appear of sufficient interest, in view of future 

 work in the groups of the microzoa. 



Foraminifera. 

 These are chiefly shells of diminutive size, probably on 

 account of the proximity of magnesic-bearing rocks, the blue- 

 stone lava. 



Nubecularia bradyi, Millett. — 



This form usually occurs in much lower latitudes, generally 

 in the neighbourhood of coral reefs. It is interesting to note 

 in connection with this, however, that specimens of a reef- 

 forming coral, Plesiastrcea, can be frequently picked up on 

 this beach. 



Miliolina circularis, Bornemann, sp. — 



A common form in nearly all shore sands, as at Altona Bay, 

 Western Port, and Torquay. The present examples are quite 

 small, as were those obtained from material dredged by the 

 Endeavour off Cape Wiles, South Australia, at 100 fathoms. 

 It is found fossil in the Victorian Tertiary strata. 



Miliolina polygona, D'Orbigny, sp. — 



One example. It is generally regarded as of fairly deep- 

 water habit, as in the subantarctic dredgings off New Zealand, 

 and from the east of Tasmania at 777 fathoms (Endeavour). 

 It occurs as a Tertiary fossil at Grice's Creek. 



Discorbina dimidiata, Parker and Jones. — 



This little Discorbine is interesting from the fact that it 

 seems practically restricted to the Australian seas. It is easily 

 distinguished from the other forms of the genus by its prominent 

 apical spire and the overlaps of the sutures with interspaces 

 on the concave side of the test. It also occurred in Janjukian 

 strata in the Mallee bores. 



Polystomella crispa, Linne, sp. — 



The tests of this species are very minute, quite the contrary 

 to what one sees in examples gathered from a limestone-bound 

 shore. It is a well-known component of shallow-water sands, 

 and is occasionally found in deep water. 



