325 
map. Some occur as veins in the main granite. The first 
occurrence noted is in the first gully south of the Cape 
Willoughby Lighthouse. The dyke outcrops at the head of 
the gully, and has a width of eight yards. Its boundaries 
apparently not graphically intergrown. 
_ A second pegmatite with predominant felspar and show- 
ing strings of quartz is well developed on the northern side 
masses. 
The remaining occurrences of this rock are in the form 
of veins, which outcrop on both sides of Pink Bay, along 
the coast. They vary in width from 2 ft. downwards, and 
ary in composition from an aggregate of blue quartz and 
white felspar to veins of pure felspar. For the most part 
these veins run parallel to the trend of the joint planes in 
the granite. 
. The three types of minor intrusion occur as separate and 
distinct masses. In no case have they been observed in asso- 
ciation, to enable their order of intrusion to be determined. 
ese, too, were the only types of intrusions seen exposed in 
the granite mass. 
Minor intrusions into the neighbouring quartzites were 
not observed; about seven miles from Cape Willoughby a 
pegmatite dyke is developed in schist. Gem tourmaline has 
been derived from this area, and the dyke is most probably 
an offshoot from the Willoughby mass. The writer had not 
: ose fashion. Some of the 
albite shows twinning after both albite and pericline laws. 
r t the fabric approaches the type 
plites. . : 
Bay, related to this series, 
magnetite appear, and in addition 
