Park.^ — On the Waitemata Scries. 399 



long thin shell which at first I thouglit might be Scalpcllum 

 auddandicwn, Hector, of which I made a large collection at 

 Motutapu Island in 1887 ; but better examples will have to be 

 obtained before this can be definitely determined. 



The Cerithium, Pecten, and corals are the same as those 

 found in the breccia at Cheltenham Beach, thus proving con- 

 clusively that the Parnell grit is the southern extension of 

 that stratum, deposited at the same time and under the same 

 geological conditions. It also shows that the Calliope Dock 

 beds, if related to those at Fort Britomart, must be superior to 

 the breccia at Cheltenham Beach and Lake Takapuna. 



As bearing upon the relation of the Parnell grit to the 

 Orakei Bay beds, I may mention that during my last visit to 

 St. George's Bay I found a number of Orakei fossils in the 

 fiat, irregular, calcareous gritty cornstones at the foot of the 

 cliff on the west side of the bay. These cornstones are only 

 exposed at low water, and occupy a position some 15ft. or 20ft. 

 above the Parnell grit. Their exact position is shown in 

 Plate XXX., fig. 4:— 



A. St. George's Bay ; 



B. Parnell Point ; 



C. Mechanics' Point ; 



D. Fossiliferous cornstones ; 



1. Mechanics' Point beds ; 



2. Layer of cornstones ; 



3. Parnell grit. 



The fossils collected at point marked D in Plate XXX., 

 fig. 4, were Pecten fischcri, Vaginella, Orhitolitcs, and a num- 

 ber of small corals. 



The occurrence of Orakei Bay fossils in this position would 

 tend to show that the Parnell grit is inferior to the Orakei 

 Bay beds ; but, if the evidence is not sufficient to prove this, it 

 shows that these two horizons are at least not far separated 

 from each other. 



At the east side of Judge's Bay the Parnell grit rests on an 

 irregular thin layer of blue clay containing minute Foramini- 

 fera. An examination of these might throw some light on 

 this point. 



