Seitz) near Porangahau. The fossils (GS2030) probably come from a lower Tertiary conglomerate, and the ammonite fragments may not be of the same age as the Inoceramus. The microfaunas are similar to those in the Teratan. Arowhanan Stage (Coniacian) Type Locality. (Fig. 11). The Arowhanan is the lowest stage of the Raukumara Series. It is defined by the beds with Inoceramus rangatira in the Mangaotane Valley Section. The beds consist of siltstones with bands of redeposited sandstone and are about 500ft thick. The stage conformably underlies the type Mangaotanean and conformably overlies Ngaterian beds with the key fossil, Inoceramus fyfei. The name is from Arowhana Survey District. Distribution. The Arowhanan Stage is represented in the four northern Cretaceous areas. Only a single locality, near Whangape Harbour, is known from western Northland. In Raukumara Peninsula the stage is represented by mudstone overlain by shelf sandstone near Tahora at the southern part of the area, by siltstone at Puketoro Stream, and by siltstone with bands of redeposited sandstone in the northern part of the area. In the East Coast Ranges it is represented by siltstone near Tinui and by redeposited sandstone and siltstone at Waimarama and near Flat Point, but is not known elsewhere. In East Marlborough it is represented by shelf sediments at Sawpit Gully, at Seymour River, at Long Creek, a tributary of Hapuka River, and in boulders at Marfells Beach. About twenty fossiliferous Arowhanan localities are known. The Arowhanan beds of Sawpit Gully were included with the Bicorrugatus Zone of Wellman (1955: 105) pending the introduction of the Arowhanan stage. Fossils. Inoceramus rangatira is the only widely distributed macrofossil. Belemnites (Dimitobelus) superstes Woods occurs at Sawpit Gully and is abundant at Long Creek, a tributary of Hapuka River. The Arowhanan is richly fossiliferous only near Seymour River, in the mid-Clarence Valley. The fossils were originally collected by McKay, and were described by Woods. The following list prepared by Dr. C. A. Fleming includes later collections. The species listed are from: GS6188 (Bluff River); 570, 5825, 5826 (Seymour River); 5827 (The Fell). The key Arowhanan fossil Inoceramus rangatira occurs in 5825 only, and the remaining collections may be Ngaterian in age. Modiolus kaikourensis (Woods) (570, 5827, 6188) Inoceramus rangatira (5825) Ostrea sp. (5827) Megatrigonia (Iotrigonia) glyptica (Woods) (570, 5825, ?5826, 5827) Esalaevitrigonia meridiana (Woods) (570, 5825, 5826, 5827) “Astarte” sp. (5825) Lucinidae n.sp. (5825) Pleurotomaria (Perotrochus) n.sp. (5826) Struthioptera sp. (570) Dimetobelus aff. superstes (Hector) (570, 5825) Wilckens (1922: 35) described Turritella solitaria n.sp. from Hapuka River (GS293), but the type is lost and its generic position is uncertain. Megatrigonia glyptica (Woods) is known from the North Island at Waiotahi River (N78 GS6287), and Kaiwhata River (N161 GS5200) and from the South Island, in addition to the mid-Clarence Valley localities already mentioned, from near the Towy River (S48 GS2278) where it occurs with Nototrigonia n. sp., Modiolus kaikourensis, and Struthioptera sp. The absence of diagnostic Inoceramus from these collections makes the age somewhat uncertain, and it is possible that M. glyptica extends down into the Ngaterian. Ngaterian Stage (Upper Turonian) Type Locality. (Fig. 13). The Ngaterian is the uppermost of the four Clarence stages. It is defined by the beds in the Motu Falls section with Inoceramus fyfei,