Trans. N.Z. Inst., Vol. LIII. 



Plate XX. 



3 Mfr " "< 



Fig. 1. — Showing the characteristic dune-bedding in the consolidated sands close to 

 the bed of lignite near the Fishing Rock, on the coast north-west of Waiuku. 



Fig. :3. 



Fig. 2. — Photomicrograph of alga] limestone north of Te Orairoa Point. The section 

 shows the structure of the algae very clearly, but on so fine a scale that the 

 photograph reproduces it poorly, a. an alga (? Lithothamnion) ; b, Polyzoa - T 

 c, a foraminifer, probably Amphistegina. X 24. 



Fig. 3. — Photomicrograph of fine Globigerina limestone, Koruahine Point. X 24. 



(Photomicrographs by J. A. Bartrum.) 



lace j 112.] 



