(F) Pseudogaudryina of reussi line (as anachrons), Marginulinopsis of hochstetteri (Stache) line (as n.spp.), Vaginulina cristellata (Stache), Siphogenerina striatissima (Stache), Cibicides thiara (Stache). Waitakian. Type Locality:—Waitaki limestone and Otiake beds, Waitaki Valley, North Otago (Allan, 1933, p. 97; Park, 1918, pp. 25, 83). Sediments:—Arenaceous limestone, 150 + ft. thick, resting on greensands (with Duntroonian micro-fauna, but without the characteristic brachiopods, which are abundant in greensands in the same valley not far away). Overlain by river gravels. Fauna:—Molluscs abundant (generically like those of Wharekuri and Awamoa, but specifically mostly different from either); brachiopods mainly of Pachymagas huttoni line, but also grading to parki types; forams abundant, but of few species and indicating an uncommon facies. Correlatives:—(By molluscs and lithology.) A similar limestone across Waitaki River in South Canterbury, and also at Wharekuri, North Otago. Probably calcareous sandy mudstones in Waipawa area, Hawke's Bay, and Huntly-Kawhia area. Restricted forms:— (M) *Fossacallista watti Marw., *Dosinula uttleyi Marw., *Waimatea transilis Fin., *“Turris” uttleyi Sut.; many new species as yet unnamed. (B) *Pachymagas huttoni Th. typical (with allied species verging towards parki series). (F) ? *Guttulina yabei C. and O., ? *Pseudopolymorphina doanei (G. and W.), Uvigerina dorreeni. These and other forms common in Waitakian may extend down to Duntroonian; even the slight differences recorded here in the faunas may be due, not to time, but to the distinct facies involved, the Duntroonian being mostly much more glauconitic and coarser in sediment. Allan (1938) mentions several lithologies, however, and it will be necessary to collect micro-faunas from each of these for comparison, also systematic collections throughout the type Waitakian. First appearance of:— (M) *Divaricella v. Mart., *Uberella Fin., *Proterato Schild. (s.str.), *Eucominia Fin., *Neocola Fin., *Inglisella Fin., *Rugobela Fin., *Cryptomella Fin., *Pervicacia Ired. (B) *Pachymagas approaching parki series (similar types). (F) *Semivulvulina waitakia, Plectofrondicularia awamoana (rare till Awamoan), Uvigerina of canariensis d'Orb. line, Siphogenerina ongleyi, Bulimina miolaevis, Cassidulina cuneata, Cibicides mediocris. Last appearance of:— (M) *Athlopecten Marw., *Spirocolpus Fin. (B) *Pachymagas of the huttoni Th. series.