556 F. Cha'imian — Eocene Foraoninifera. 



formations T had collected on an extensive scale. The tests are all 

 arenaceous, the facies representing a somewhat different hydrographic 

 condition from that of the deposits belonging to the two last-named 

 series, represented in my collection from the Barton Cliffs, Brackles- 

 ham Bay, and from many typical exposures in the Isle of Wight. 



Description of the Fokaminifera. 



Fam. LITUOLID^. 

 Genus Haplophkagmium, Reuss. 



Haplophragmium canariense, d'Orbigny, \a.x. pauper ata, no v. 

 Figs. 1-4. 



This variety is distinguished from the specific type ' by its small 

 and distorted condition, often accompanied by a deflation of the finely 

 arenaceous walls of the chambers. The more regular examples, of 

 which there are one or two exceptional cases, link themselves with 

 H. canariense, of cosmopolitan distribution. 



The variety is smaller than type-specimens of the species, the 

 former averaging "58 mm. in greatest diameter, whilst the latter 

 measures "84 mm. ( Challenger example). 



S. canariense, var. pauperata is moderately abundant in the 

 washings from the clay seams of Hengistbury Head. 



Genus LiTUOLA, Lamarck. 



Lituola simplex. Chapman. Figs. 7, 8. 



Lituola simplex, Chapman, 1904, Rec. Geol. Surv. Vict., vol. i, pt. iii, p. 228, 

 pi. xxii. 



Several sub-discoid and crosier-shaped tests, very thin and com- 

 pressed, and consequently very fragile, were found in the washings. 

 They can be distinguished from mere adventitious flakes or con- 

 cretions of mud by their simulation of the depauperated and 

 compressed forms of Haplophragmium and Trochatnniina. Their 

 obscurely septate and labyrinthic internal structures make them come 

 within the Lituolid group. 



The original examples above quoted were from similar washings 

 of chocolate-coloured clays from the Miocene (Janjukian) of Brown's 

 Creek, Otway Coast, Victoria. This particular fauna was remarkable 

 for its shallow-water and estuarine character, although, strange to 

 say, the genus Ci/clamtnina, more or less depauperated, was also 

 abundant therein. This latter genus was only recorded between 

 100 and 2,900 fathoms by the Challenger, and was then (in 1884) 

 " unknown in the fossil state". Subsequently, however, Cyclammina 

 has been noted from moderately shallow-water fossil deposits from 

 the ? Jurassic onwards.^ 



The average diameter of the tests of L. simplex, as occurring in 

 the present washings, is '65 mm. The diameter of that figured from 

 the Victorian Miocene is "55 mm. 



^ Nonionina canariense, d'Orbignv, 1839, Foram. Canaries, p. 128, pi. ii, 

 figs. 33, 34 ; Haplophragmium canariense, d'Orb., sp., Brady, 1884, Rep. 

 ChalL, vol. ix, p. 310, pi. xxxv, figs. 1-5. 



2 Rec. Geol. Surv. Vict., vol. i, pt. iii, p. 229, 1904. 



