118 Transactions. 
This list does not convey much actual information to any but those 
who are quite familiar with the Tertiary fauna of New Zealand. The 
following summary of the occurrence of the species will make its nature 
clearer: 45 per cent. are at present restricted to the Hampden fauna ; 
11 per cent. have been found also in the Waihao beds but nowhere else ; 
29 per cent. occur among the seventy species that have been found at 
Waihao ; 20 per cent. occur ок се 215 species found at Target Gully ; 
6 per cent. are of Recent occurren 
These figures clearly show the Т facts :— 
(1.) The essential peculiarity of the molluscan fauna of Hampden. 
(2.) The close relationship with the Waihao fauna, for 44 per cent. 
of the fossils that have been found at McCullogh’s Bridge on 
the Waihao have also been found at Hampden. 
(3.) ree than 10 per cent. of the 215 fossils that have been found 
n the Target Gully beds have also been found at Hampden. 
Since these Target Gully beds rest directly on the limestone, 
and the Waihao beds lie immediately below it, the fact at 
once я clear that during we E of the lime- 
stone eat faunal change took 
(4.) The il percentage of Recent species cians that the Hampden 
beds are not older than the European Eocene (of which they 
are in all probability the equivalent); and, as stated else- 
_ Where, the Recent species are represented by very few 
specimens, and several of them have not been identified with 
absolute certainty. 
The following 1 is a list of the Waihao Mollusca, most of which (actually 
sixty-one species) were collected in January, 1921, by Marshall and Murdoc 
from the right bank of the river directly below McCullogh’s Bridge. The 
list includes also a few species that were collected by Uttley i in 1912 and 
by Thomson in 1917, but the three species of Verconella given in the list 
о Suter’s identifications of the latter collection are omitted, as the specimens 
are said to be juvenile, and in our opinion it is not satisfactory to identify 
species of that genus from juvenile specimens. The lists from which the 
mes of these additional species were taken will be found in the N.Z. 
Geol. Surv. Paleon. Rep. No. 8, pp. 66 and 67. 
Ampullina suturalis (Hutton). Dentalium mantelli Zittel. 
Ampullina waihaoensis Suter. Dentalium pareorense Pilsbry and 
Ancilla novae-zelandiae (Sowerby). Sharp. 
Ancilla waikopiroensis Suter. Dentalium solidum Hutton. 
Architectonica ngaparaensis Suter. Drillia laevis Canen 
Aturia Epitonium elatum Sut 
Войн eximia Suter. Epitonium rugulosum gait uot (Zittel) 
Borsonia brachyspira Suter. Erato antiqua Marshall. 
hin: cincta (Hutton). Euthria stirophora Suter. 
nia rudis (Hutton). Exilia crassicostata Suter. 
Cerithiella fidicula Suter. Exilia waihaoensis Suter. 
Corbula canaliculata Hutton. — - Fusinus climacotus Suter. 
Corbula pumila Hutton. Fusinus modestus Marshall and 
Cucullaea sp. Murdoch. 
Cylichnella enysi (Hutton). Fusinus solidus Врие, 
Cymatium minimum (Hutton). Galeodea senex (Hutton). 
Cytherea sp. Gilbertia tertiaria (Marshall). 
= Daphnella neozelanica Suter. Limopsis aurita (Brocchi). 
