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Volume 55, 1924
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– 510 –

Awamoa List.

There are several different kinds of matrix from which shells have been collected at this well-known locality, and lists from these will, if found necessary later, be given separately. In the meantime the new records made here are marked according to the matrix in which they were found—(1) Shelly boulders cast up on the beach; (2) blue clays forming the banks of the creek; (3) very hard and rather poorly fossiliferous mudstones apparently resting on the blue clays, and cropping out all along the beach at high-tide level. Fossils often as casts, but no records are here made on such.

The list specimens come chiefly from (1), as also did the bulk of the Geological Survey Awamoa specimens, which were not examined by Suter. Good collections have not previously been made from the far more important locality (2).

  • Actaeon praecursorius Sut. (1).

  • Aethocola spinifera Finlay and McDowall (1).

  • *Amphidesma subtriangulata Wood (3). [Mesodesma.] (New for the Miocene; the specimen is a young shell and may be referable to the subsp. pliocenica Oliver.)

  • Anomia trigonopsis Hutt. (1).

  • Bivetia brevirostris (Hutt.) (1). [Latirus.]

  • Brocchina pukeuriensis (Sut.) (2). [Ptychatractus.]

  • Bullinella soror (Sut.) (1 & 2). [Cylichnella.]

  • Corbula humerosa Hutt. (2).

  • *Crepidula monoxyla (Less.) (1).

  • Crossea cf. sublabiata Tate (2). (Probably same as the species recorded by Marshall as C. labiata T.-Woods from Pakaurangi Point.)

  • Cucullaea alta Sow. (2).

  • Cucullaea alta var. B Hutt. (1 & 3).

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  • Cucullaea australis (Hutt.) (1).

  • *Diplodonta globularis (Lamk.) (1).

  • *Divaricella cumingi (Ad. & Ang.) (1 & 2).

  • *Emarginula striatula Q. & G. (1).

  • Galeodea senex (Hutt.) (2 & 3).

  • Glycymeris huttoni Marwick (1). [G. globosa (Hutt.).]

  • Lima bullata Born (2).

  • Lucinida laminata (Hutt.) (1 & 2). [Loripes.]

  • *Macoma edgari Iredale (1 & 3). [Tellina glabrella.]

  • *Mactra cf. discors Gray (3).

  • *Mactra scalpellum Reeve (1).

  • *Malletia australis (Q. & G.) (1, 2, & 3).

  • Monia incisura (Hutt.) (1 & 2). [Placunanomia.]

  • Pecten huttoni Park (3).

  • *Protocardia pulchella (Gray) (1).

  • Pyrgulina pseudorugata (M. & M.) (2).

  • Rhizorus reflexus (Hutt.) (1). [Volvulella.]

  • *Serpulorbis sipho (Lamk.) (1).

  • Sinum miocaenicum Sut. (2).

  • *Spisula cf. aequilateralis (Desh.) (3). (New for the Miocene.)

  • Struthiolaria subspinosa Marwick (1 & 2).

  • Struthiolaria cf. obesa Hutt. (1).

  • *Tellina gaymardi Iredale (3). [T. alba Q. & G.] (Record confirmed.)

  • *Tellina liliana Iredale (1). [T. deltoidalis.]

  • Terebra orycta Sut. (3).

  • Teredo heaphyi Zitt. (1).

  • Ventricoloidea vellicata (Hutt.) (1 & 3). [Chione.]

  • Vexillum linctum (Hutt.) (2).

  • Vexillum rutidolomum Sut. (3).

  • Xymene lepidus (Sut.) (2). [Trophon.]

  • *Zenatia acinaces (Q. & G.) (1).

Add also the species Eulimella awamoaensis M. & M. (2) and Turbonilla awamoaensis M. & M. (2), recorded by Marshall and Murdoch (8c), but not Daphnella varicostata M. & M., which is a synonym of Bela canaliculata Sut. (see ante). Besides the above, the following forms have been recorded as occurring at Awamoa. They are not given in the list, but are mentioned in various places in Pal. Bull. 2, 3, and 5—in several cases as holotypes.

  • Aethocola costata (Hutt.) (2?). [Siphonalia.]

  • Bathytoma transenna (Sut.) (2). [Leucosyrinx.]

  • Corbula kaiparaensis Sut. (2).

  • *Crassatellites obesus (A. Ad.) (1, 2, & 3).

  • Drillia awamoaensis (Hutt.) (2).

  • Lima colorata Hutt. (1, 2, & 3).

  • Limopsis zealandica Hutt. (2). [L. aurita Brocchi; not of Brocchi.]

  • Rissoina vana Hutt. (2). (In another paper in this volume (p. 493) it is shown that this name should be omitted from these lists.)

  • Trigonia semiundulata Jenkins. [T. subundulata Jenkins.] (Mr. Marwick has shown that this record should be deleted, as it is based on an Australian specimen.)

  • Turricula huttoni (Sut.) (1 & 2). [Surcula.]

The above lists considerably reduce the number of species peculiar to any one of the localities, and it is very probable that more exhaustive collecting would still further reduce them.

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A résumé of new points in connection with nomenclature and range of species indicated in this paper would run as follows:—

(1.)

New generic placings:—

  • Latirus brevirostris (Hutt.) Bivetia. (?)†

  • Circulus helicoides (Hutt.) Elachoribis.

  • Circulus politus Sut.

  • Circulus cingulatus Bart.

  • Odostomia pseudorugata M. & M. Pyrgulina.

  • Cymatium suteri M. & M. Xymene.

  • Austrotriton neozelanica M. & M. Charonia.

  • Ptychatractus tenuiliratus Sut. Bela (provisional).†

  • Ptychatractus pukeuriensis Sut. Brocchina (provisional).†

  • Admete anomala M. & M. Brocchina (provisional).†

  • Borsonia cincta (Hutt.) Brocchina (provisional).†

  • Admete lacunosa Hutt. Bonellitia.

  • Leucosyrinx transenna Sut. Bathytoma (provisional).
(2.)

New synonyms advocated (correct name second):—

  • Protocardia sera Hutt. P. patula (Hutt.).

  • Corbula canaliculata Hutt. C. humerosa Hutt.

  • Daphnella varicostata M. & M. Bela canaliculata Sut.

  • Surcula fusiformis (Hutt.) Turricula oamarutica (Sut.).

  • Surcula huttoni Sut. Turricula oamarutica (Sut.) (?).

  • Tritonidea elatior Sut. Pollia compacta (Sut.).

  • Euthria subcallimorpha M. & M. Pollia compacta (Sut.).

  • Cytherea chariessa Sut. Antigona vellicata (Hutt.).
(3.)

Species wrongly recorded from the Awamoa stage:—

  • *Thoristella chathamensis (Hutt.).

  • *Trochus tiaratus Q. & G.

  • *Cantharidus tenebrosus A. Ad.

  • *Venericardia difficilis (Desh.).

  • *Crepidula costata (Sow.).

  • *Xymene quirindus Iredale.

  • Mitra armorica Sut.

  • *Nozeba emarginata (Hutt.).

  • *Fusinus spiralis (A. Ad.).

  • Cymatium minimum (Hutt.).

  • Turris regius Sut.

  • Borsonia (all species).

  • *Verconella caudata (Q. & G.).

  • *Verconella dilatata (Q. & G.).

  • *Turritella, *Ancilla, and *Alcithoe (all Recent species).

  • Glycymeris subglobosa Sut.

  • *Bathytoma albula, (Hutt.).

  • *Natica zelandica Q. & G.

  • *Natica maoria Finlay.

  • *Polinices vitreus (Hutt.).

  • *Antigona oblonga (Hanley).

  • Chione subsulcata Sut.

  • *Chione mesodesma (Q. & G.).

  • *Cassidea pyra (Lamk.).

[Footnote] † See addendum.

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