The cycad Zamites cf. takuraensis Walkom was collected from about 100 feet lower in the sequence (McQueen, 1956). Fauna. The following occur at the type section. Pisces Diplomystus coverhamensis Chapman. Mollusca Turrilites circumtauriatus (Kossmat) (Mariella or Pseudhelioceras according to Spath, 1953: 46) Inoceramus concentricus Parkinson Inoceramus sp. Z Corals Haimesiastrea anchistina Squires Dr. C. A. Fleming has listed the following from the fossil band at Koranga (GS792): Nucula sp. Nuculana sp. Cucullaea ? aff. hendersoni Eth. Aucellina aff. gryphaeoides (Sow.) ? Chlamys sp. Parvamussium sp. Pseudolimea n.sp. aff. echinata (Eth.) Puzosiinae (gen. indet.) Rotularia sp. Undetermined rhynchonellid and terebratulid brachiopods. Isurus sp. In Fifty Stream, gritty conglomerate (GS1401) contains Aucellina aff. gryphaeoides, Syncyclonema (?) sp. Exogyra cf. conica (Sow.), Rotularia, and a brachiopod, Kingena (?) sp. No foraminifera have been found in the Coverian. Korangan Stage (Aptian) Type Locality (Fig. 15). The Korangan Stage replaces the Taitai Series of Finlay and Marwick (1940: 102). No type locality was given, but Finlay and Marwick mentioned that the fossils on which the Taitai Series was based came from the Koranga district and that the name was taken from the Taitai Sandstone at Tapuwaeroa Valley, 40 miles north-east. The Taitai Sandstone is unfossiliferous and may not be the same age as the fossiliferous beds. The fossils represent a relatively short time interval, certainly not of series rank. It thus seems best to redefine the fossiliferous beds as a stage, for which the name Korangan—taken from the Koranga River district—is the only one available. The name Koranga “Series” was used by Ongley (1930: 8) in the sense of a formation name for a group of beds that were considered to underlie the Korangan but which actually overlie and are now included in the Raukumara “Series” of Ongley and Macpherson (1928) and considered to be Coverian to Ngaterian age. The confusion is due to overturning in Winding Stream (Fig. 15) not seen by Ongley. The relation of the Korangan to the overlying sediments is illustrated in Fig. 8. The stratigraphy is given below: Koranga Section Motuan Stage Feet Mudstone with Aucellina cf. euglypha 20+ Urutawan and Coverian stages? Mudstone, no fossils found 500 Grit bands with abundant fossils (GS5792) 5 Korangan Stage Hard dark sandstone with ill-defined conglomerate bands 500 Feldspathic medium sandstone with rare fossils (GS3154) 20 Conglomerate and dark sandstone with rare fossils (GS5790) 10 Possibly Mokoiwian Dark sandstone and siltstone (greywacke) with rare conglomerate bands 500+