500 Transactions. 
turtle (Chelone mydas), leathery turtle (Dermochelys coriacea), common 
sea-snake (Hydrus platurus), and ringed sea-snak (Platurus colubrinus). 
(See Cheeseman, Trans. N.Z. Inst., vol. 40, p. 167.) 
ocal surface currents on the coast of New Zealand are determined 
mainly by tides. The flood tide runs eastward through Foveaux Strait 
and northward along the coast of New Zealand and through Cook Strait. 
In Hauraki Gulf, however, it flows south. On the west coast of the 
North Island the flood tide runs south as far as Cape Egmont, with a 
northerly diversion in Taranaki Bight. Past Cape Campbell it is westerly. 
Ebb tidal streams are the reverse of these. 
SEA-TEMPERATURE. 
_ There is a considerable difference between the temperature of the sea 
in the north and in the south of New Zealand. The annual range for 
each locality, however, is ‘about the same—namely, 8°-9° C. The depend- 
š ias 
that of the air, its amplitude is much less, and the maxima and min 
report mentioned below. While the curve of sea-temperature follows — 
d minima 
ев RE м of sen-temperature (thick line) on air-temperature — . 
in 
line), Portobello. 
I give herewith a table showing air- and period — 
- sea-temperatures for a perio 
of a year at Auckland, Ne nd Dunedin. The figures for Auckland 
M d f 
Mr. T. Anderton, and recorded in Trans. N.Z. Inst., vol. 38, P. = 
The Wellington records were made by myself. 
