Revieivs — Australian Foraminifera. 273 



whioh are very closely related to the type species A. lalns, from the 

 Lower rormiau of Kheniah rrussia, but have relatively smaller 

 dorsal and anal fins. 



The Labyrinthodont fragments belong to the genus Archegosaurus, 

 and are rol'orred to a now species, A. ornalns. One Hpecimon consists 

 of a portion of a head ; the other (belonging to a smaller individual) 

 includes remains of the rachitomous vertebral column, with the 

 characteristic ribs. 



The plant and vertebrate remains described in (Ids memoir are 

 made the more easily intelligible by the three excellent plates which 

 illustrate it. A. II. F. 



VI. — Peumo-Caucgnifeuous Fokahunifeua of Australia. 



A MONOOllAJ'II OF TIIK FoUAMINIFlflUA OF THE rKUMO-CAKBONIFEUOUS 



Limestones of New South Wales. By Fuedeuiok Chapman, 

 A.L.S., F.K.M.S., National Museum, Melbourne, and Walter 

 HowoHiN, F.G.S., Adelaide University. 4to ; pp. i-xvi and 

 1-22, with 1 plates. (Sydney : W. A. Gullick, 1905.) 



PKOFESSOK T. W. EDGEWOUTH DAVID, of Sydney, gives 

 an introductory account of the two distinct and widely distant 

 horizons which have yielded the Foraminifera described in this 

 Monograph. The Upper or Wollong foraminiferal horizon belongs 

 to the Branxton stage of the Upper Marine series, at about 2,300 

 feet above the Greta Coal-measures, and the Lower or Pokolbin 

 horizon belongs to the Lochinvar stage of the Lower Marine series, 

 at about 1,700 feet below the Greta Coal-measures. 



A diagram in tiie text, at page xvi, shows the relative position 

 of these two special horizons, and of the Greta Coal-measures, in 

 the succession of strata in the Hunter liiver district. New South 

 Wales. 



At Pokolbin the Foraminifera occur in an earthy limestone, 

 with scattered particles of volcanic rook and numerous well- 

 preserved Fenestellidaa. This deposit was probably I'ormed on the 

 shores of high volcanic islands, which became gradually submerged, 

 with successive margins of conglomerate, saiidstone, and pebbly 

 shales; these passing upwards into foraminiferal calcareous sand- 

 stone or earthy limestone. Over the Pokolbin limestone occur 

 about 2,000 feet of sandy shale, with thin Ostraood limestones. 

 Then the Farley Sandstone for about 1,000 feet, with occasional 

 glacial erratics ; and then about 200 feet of sandstone, shales, and 

 fire-clays, with two seams of coal (Greta Coal-measures). Marine 

 conditions supervened, represented by pebbly beds, sandstone, and 

 niudstoue; the uppermost constitute the Muree Beds with Slrophalosia. 

 At 200 feet below this and 2,600 feet above the Greta Coal-measures 

 is found the Wollong horizon, with very fine Foraminifera, Corals 

 {Trachypora) , and some Fenestellidoa. 



The above-mentioned deposits constitute part of the great succession 

 of strata formerly regarded as the old Carboniferous system ; but, 



DECADE V. — VOL. III. — NO. VI. 18 



