COMPARED WITH THOSE OF AUSTRALIA, 75 
Fossils are plentiful, and divide the strata into distinct horizons, 
Ammonites being especially common ; fifteen species have been 
determined, but a large number of others are present whi 
have not yet been identified. 
present the same abnormal survival of older types, especially in 
the occurence of an Athyris-like shell belonging to a new sub-genus, 
Clavigera, which has a great development in the next lower forma- 
tion. 
Nothing which corresponds to this formation has yet been found 
in Australia. 
X.—TRIAS: 
a. Otapiri series. 
6. Wairoa series. 
c. Oreti series. 
on paleontological and stratigraphical grounds, and the 
clearly sate ddan character erg next underlying forma- 
tion, renders this classification absolutely necessary. 
The Otapiri series consists of a group of strata which I place in 
upper trias, or more properly as an equivalent of the Rheetic 
formation, and is remarkable for the mixed character of its fossils, 
which however contain many forms identical with those from the 
Rheetic formation of the European 
otapiriensis, which is near to B. elongatus of the English lias, 
along with Plewrotomaria ornata, and Taneredia truncata, which 
lite 
ta, 
rms, associated with a prepond triassic and 
even permian forms, fourteen species of which have been deter- 
mined, amongst which are Nautilus and Nautilus 
, The remarkable feature of the Otapiri series is the abundance 
- Brachiopoda, which are elsewhere so rare in formations of this 
ch has seven us 
Athyris ; dasub-genus of Spiriferina, which I name Aastel- 
ligera, with five i enti ly confined to this 
