254 THE JUKASSIC KOCKS OF SEW ZEALAND. [vol. lxxix. 



apparently a Limea; Serpulid tubes, one recalling S. convoluta 

 Groldfuss attached hy the apex, and curled both dextrally and 

 sinistrally ; another resembling the genus Pyrgopolon. 



Kawhia Harbo 



-our. [By Prof. Patrick Marshall, 

 M.A., D.Sc, F.G.S.J 



Early in 1915 I paid a visit to Kawhia in company with Prof. 

 Marshall. Most of my time was spent in collecting the fossils of 

 the various outcrops, but Prof. Marshall (who had visited the 

 locality on previous occasions) has sent me the accompanying map 

 and description of the strata represented in the district. 



Near Te Arawi, where the Pseudomonotis Bed (Noric) is situated, 

 there is a large intrusion of porphyrite. This, however, does not 

 much aft'ect the sedimentaiy strata. The Pseudomonotis Bed is a 

 fine-grained grey sandstone. This type of rock is continued along 

 the cliff-face almost to Te Maika, though it varies somewhat in 

 coarseness. Occasionally, there are thin bands of a fine con- 

 glomerate. The stratification is quite regular, the strike gradually 

 swinging to the north. It is 312° at the Pseudomonotis Beds, 

 but has changed to 340° where the ammonite (Arcestes cf . rliceticus 

 W. B. Clark) was found. Thence it gradually becomes more 

 northerly, and at Te Maika, Z\ miles distant, it is 8°. Locally 

 small changes in the strike can be observed, though in all cases 

 the normal direction is soon regained. There are a few faults, but 

 these appear to be of no importance and of no great magnitude. 

 The small bands of conglomerate in this part of the section are 

 not of any consequence. 



Farther west towards Albatross Point, on the farther side of the 

 porphyrite intrusion, massive beds of conglomerate occur, and 

 the strike of the rocks becomes much more westerly. No fossils 

 were found in that part of the cliff-face. At Te Maika thick beds 

 of conglomerate occur. The pebbles are seldom more than 

 6 inches in diameter, and are well rolled : they consist mainly of 

 granophyre and other kinds of quartz-porphyry, and even granite- 

 porphyry. No rocks of this type occur at the present day in 

 situ in the North Island, and they are unusual in the South 

 Island. 



At Totara Point the strike is almost the same as at Te Maika. 

 The rocks at this point are only about 530 feet higher in the 

 section than those at Te Maika Point. The beds at Totara 

 Point are also conglomerates of the same nature as those at Te 

 Maika. Ammonite-beds and a bed of other mollusca occur 

 closely below the conglomerate. These beds are gritty, and in 

 places almost glauconitlc. On the other side of the small bay at 

 Kohai Point the rock becomes finer, and is in effect a mudstone. 

 The strike, however, is practically the same as at Te Maika, 

 and the clip remains about 45°. 



At Ohana Point another bed of conglomerate occurs, having the 

 same character and composition as those described before. 



