Drummond. — On Introduced Birds : Dates. 503 



tiou of specimens which before examination by microscope 

 were thought to be marbles showed that these rocks were only 

 a further and more completely changed hartzbergite, for they 

 contained a large quantity of unchanged rounded grains of 

 olivine (Plate XXIII, fig. 1). These white rock-specimens were 

 found on the beach ; none have yet been found in situ. The 

 margins of crevices penetrating the hartzbergite showed, how- 

 ever, a far more complete carbonation than other parts of the 

 rock. 



EXPLANATION OF PLATES XXI-XXIIL 

 Plate XXI. 



of fiord region of Otago, showing localities from which rocks were 

 obtained. 



Plate XXII. 



Face of rock on east side of Thompson Sound, near Anita Bay, showing the 

 effects of glacial erosion on the rocks. 



Plate XXIII. 



Fig. 1. Altered hartzbergite. Anita Bay. Rounded grains of olivine are 

 surrounded by grains of magnesium-carbonate. 



Fig. 2. Gneiss. Bowen Falls. A large plate of triclinic feldspar — an- 

 desine — showing albite twinning and undulose extinction is pene- 

 trated by needles of epidote, with their long axes parallel to the basal 

 plane of the feldspar. To the left small grains of quartz and larger 

 ones of hornblende. 



Fig. 3. Gneiss. Anita Bay. On the right a large crystal of hornblende 

 penetrated by epidote crystals, which extend to the left of the figure. 

 Some of the crystals of epidote contain a central core of garnet. 



Fig. 4. Pyroxene gneiss. Duck Cove, Dusky Sound. The pyroxene 

 shown on the left of the figure is associated with much garnet, feldspar, 

 and a little qiiartz. 



Art. X L V. — Dates on which Introduced Birds have been 

 liberated, or have appeared, in different Districts of New 

 Zealand. 



By J. Drummond, F.L.S. 



[Read before the Philosophical Institute of Canterbury, 1st December, 1906.] 



The following list has been prepared mainly from informatior 

 supplied by means of a circular which I drafted two years ago, 

 and which Mr. T. W. Kirk, F.L.S., Government Biologist, 

 kindly issued for me through his Department. Copies of the 

 circular were sent throughout the whole of this colony. The 

 list of introduced birds, however, is not complete, as few records 

 in regard to the introduction of small birds into New Zealand 



