The Molluscan Fauna of Target Gully: Part 1. By H. J. Finlay, M.Sc., Edmond Fellow of Otago University. [Read before the Otago Institute, 8th August, 1922; received by Editor, 31st December, 1923; issued separately, 30th July, 1924.] Contents. Page Introduction 495 Additional species recorded since the appearance of the list in N.Z. Geol. Surv. Pal. Bull. No. 8 495 Necessary changes in the nomenclature introduced by previous workers 497 Discussion of some problems regarding errors in the list 499 General variation of species at Target Gully and notes on the localities 507 New records of existing species 508 Résumé of new points mentioned in the paper 512 Literature cited 513 Addendum 513 Since Target Gully is the richest fossil deposit in New Zealand, and in many ways is regarded as a type locality for the Awamoan horizon, it is necessary that its fauna should be thoroughly examined. Five visits have been paid to Oamaru localities, and some forty to fifty thousand specimens have been obtained. Examination of these has shown that the existing list of fossil shells from this locality (13a) * Numbers in brackets refer to the bibliography at the end of the paper. is far from complete, and needs much revision in its nomenclature. The present paper is a preliminary attempt to deal with this: it consists of lists of new records from four Oamaru localities, and a series of notes on the necessary nomenclatural changes. A complete list of the Mollusca from Target Gully will be presented on a future occasion. The following species, not previously obtained from this locality, may now be added to the list. Where a name has been corrected, the old name is placed in square brackets after it. To facilitate reference the lists are in alphabetical order. An asterisk denotes a Recent species. Probably it will prove, when actual specimens have been compared, that the “Recent” species in these and other lists are not in all cases con-specific with now-living forms, but for the present these names are in usage and can be adopted as tentative. Aethocola spinifera Finlay and McDowall. Alectrion latecostata Sut. Bela tenuilirata (Sut.). [Ptychatractus.] *Cadulus delicatulus Sut. (Recorded as fossil previously only from Pakaurangi Point.) Callanaitis speighti Sut. [Chione.] Chlamys chathamensis (Hutt.). [Pecten.] Cominella pulchra Sut. Crossea cf. cancellata (T.-Woods). (New as a fossil.) Cucullaea alta var. B Hutt. Cucullaea attenuata Hutt. Galeodea senex (Hutt.). *Hexaplex octogonus var. umbilicatus (T.-Woods). [Murex.] *Hexaplex octogonus var. espinosus (Hutt.). [Murex.]