144 Transactions. 
observed similar relations between the beds of the two series near Matakana 
North Head. Similarly, in a railway-cutting a short distance north of the 
cement-works at Portland, near Whangarei, pebbles of what appears cer- 
tainly to be Onerahi limestone are present in a fine conglomerate of the 
succeeding series. These conditions are so widespread as to suggest un- 
conformity rather than mere disconformity between the Waitemata and 
Onerahi series. This is in accord with conclusions reached by Ferrar 
(1922) as a result of recent field-work in the Whangarei and Bay of Islands 
Subdivision. Insufficient data are available to allow exact estimate of the 
nature of the surface of Onerahi rocks covered by the Waitemata series. 
n some localities it is obvious that it now is highly irregular, but it is 
impossible to be sure that such irregularity is not the result of diastrophic 
movements of more recent date than the period of deposition of the covering 
beds. 
In spite of the fact that the andesitic conglomerate formation is 
generally accepted as conformable to the Waitemata series, it seems ad- 
visable to keep in view the possibility of the truth of the second hypothesis, 
which is contrary to this belief. 
2. WAITEMATA SERIES. 
Petrography, Distribution, &c. 
When traced north-west from Auckland along the shores of Waitemata 
Harbour, the beds of the Waitemata series preserve for many miles à 
marked regularity of type, and are predominantly somewhat feldspathic 
EPC Tee MENTO, о ERANT 
