part 3] jueassic eocks of new Zealand. 257 



include Phylloceras cf. mediterraneum (Neumayr) and Ino- 

 ceramus cf. galoi Boehm. 



. The brachiopods that we collected on the slopes of Flag Hill in 

 the Hokonui Hills, according to Mr. S. S. Buckman, present a 

 Callovian aspect. 



The beds at Kohai Point, Kawhia, containing Inoceramus 

 haasti and Aucella ■plicata have yielded no ammonites, so far 

 as I am aware ; but they cannot be far above those of Totara 

 Point, and I. haasti is evidently related to I. galoi. I collected 

 a Phylloceras on the shore not far below the I.-haasti Beds. 



The beds at the Mission Station of Te Ahu Ahu yield belemnites 

 very similar to those from the Oxfordian of the Sula Islands. 



Considering the absence in all the last-mentioned localities of 

 ammonites other than the relatively long-lived Phylloceratidse, 

 it seems possible to make only an approximate determination of 

 their age, and to conclude that they fall into the Bathonian- 

 Callovian -Oxfordian series of deposits. 



The highest Jurassic beds in which we collected, at Te Puti on 

 the northern shore of Kawhia Harbour, appear to be of Tithoniam 

 age. Probably more than one horizon is represented in the cliffs, 

 since all the ammonites were found washed out and lying on the- 

 shore. These include Uhligites hectori Spath and Aulaco- 

 sphinctoides brownei (Marshall), and their age is discussed by 

 Dr. Spath (p. 298). 



The evidence for the presence of still higher beds in the New 

 Zealand Jurassic sequence is chiefly founded on the occurrence of 

 Berriasella novoseelandica (Hauer), but the locality of this 

 specimen seems somewhat doubtful. 



The marine fossiliferous Jurassic series of New Zealand, there- 

 fore, commences with the lowest Lias and closes with beds 

 representing the Tithonian. The oldest marine Cretaceous beds of 

 the covering series of strata, according to Mr. Henry Woods, 1 

 are of Grault age, the equivalent of the Lower Utatur Beds of 

 Southern India. These occur in the Clarence Valley in the 

 north-eastern part of the South Island, and were found by Dr. J. 

 Allan Thomson. Further transgressions are represented by the 

 Conchothyra parasitica Beds of Upper Senonian age. 3 



The intervening epoch, Tithonian-Albian, may appear inadequate 

 to account for the great Mesozoic orogenic uplift and subsequent 

 denudation and planation that affected the New Zealand area ; but 

 the evidence points to the fact that it must have been accomplished 

 during this interval. Prof. Marshall writes 3 : — 



' The close of the Trias-Jura is on all sides regarded as the critical period 



1 ' The Cretaceous Faunas of the North-Eastern Part of the South Island ' 

 N.Z. Geol. Surv. Pal. Bull. No. 4 (1917) p. 2. 



2 C. T. Trechmann, Geol. Mag. 1917, p. 296. 



3 ' Haudbuch der Regionalen Geologie ' Heft 5, vol. vii, pt. 1 (1912) p. 36. 



