BY H. I. JENSEN. 811 



investigated by Mr. C. Hedley.* The material which is here 

 investigated is a somewhat fine-grained sand, many of the particles 

 of which, both organic and inorganic, were of a reddish colour 

 owing to iron oxide staining. The ferruginous matter has pro- 

 bably been derived from the decomposition of basalt, similar to 

 the adjoining Kiama basalt, which probably forms the sea-floor 

 in this area. 



No distinctly new species were distinguished in this material. 



The species identified in each subfamily are here divided into 

 two series, (a) those which also occur in Port Jackson and which 

 are enumerated in Whitelegge's List,! a.nd (b) those which have 

 not been mentioned by Whitelegge as occurring in Port Jackson. 



References to figures are given in the same way as in White- 

 legge's List; but no references are given for species mentioned 

 therein. Mr. Whitelegge's abbreviation C.R. for "Challenger 

 Report '' is used in this paper. 



Family NUBECULARID^. 

 Subfamily MILIOLININ.!;. 



(a) 1. Spiroloculina impressa. 



2. S. LIMBATA. 



(6) 3. Planispirina exigua, Brady, C.R., pl.xii. f. 1-4. 



4. P. siGMOiDEA, Brady, C.R., pl.ii. f.l. 



5. Spiroloculina arenaria, Brady, C.R., pl.viii. f.l 2. 



6. S. FRAGiLissiMA, Brady, C.R., pl.ix. f.l 2. 



7. S. EXCAVATA, d'Orb.; C.R., pl.ix. f.5-6. 



8. MiLiOLiNA ALVEOLiFORMis, Brady, C.R., pl.viii. f. 15-20. 



Subfamily PE5IER0PLIDIN.ffi. 



(b) 9. CoRNUSPiRA iNVOLVENS, Reuss; C.R., pl.xi. f.3. 



* Studies on Australian Mollussa. Part viii. Proc. Linn. Soc. N. S. Wales, 

 1904, xxix. 82. 



t " List of the Marine and Fresh- water Invertebrate Fauna of Port Jackson 

 and Neighbourhood." Journ. Proc. Roy. Soc. N. S. Wales, xxviii. 1889. 



