Cox. — On the Mineralogy of New Zealand. 399 



Heulanclite, '£\ Si 3 + Ca Si 3 + 5 H. — The occurrence of this mineral 

 in amygdaloidal traps associated with felsite porphyries in Canterbury, is 

 mentioned by Dr. v. Haast (Jurors' Eep. N.Z. Ex., 1865, p. 257). 



Apophyllite, 8 (Ca Si 2 + 2 H) + K F, is mentioned by Dr. v. Haast 

 (Jurors' Eep. N.Z. Ex., 1865, p. 267) occurring in arnygdaloids at Ban- 

 gitata, and ichthyophthahmte in felsite porphyries at Turnagain Point, 

 Eangitata. 



Stilbite, jy. Si 3 4- Ca Si 3 + 6 H, is mentioned as occurring at Turn- 

 again Point, Eangitata, by Dr. v. Haast (Jurors' Eep. N.Z. Ex., 1865, p. 

 257). It also occurs at Tokatoka on the Wairoa Elver, Auckland, as radi- 

 ating pearly crystals in a trachytic rock which forms Mts. Maungarahu and 

 Tokatoka, and it is again found in a similar rock which occurs at Puke- 

 korero, a mountain lying between the Kaiwaka arm of Kaipara Harbour 

 and Mangawhai. Prof. Liversidge (Trans. N.Z. Inst., vol. x., p. 500) also 

 alludes to its occurrence at Dunedin in amygdaloidal basalts as follows : — 

 " In the cavities of these specimens are minute detached crystals of one of 

 the zeolites. The form appears to be that of a rhombic prism capped with 

 the pyramid ; this is a combination often assumed by stilbite, and in addi- 

 tion the little crystals possess a very high lustre, not unlike that of stilbite; 

 moreover, they behave like that mineral before the blowpipe, hence they 

 probably belong to the same species. 



Prehnite, jy. Si + 2 Ca Si + H. — This mineral is mentioned by Dr. 

 Hector (Jurors' Eep. N.Z. Ex., 1865, pp. 266 and 437) as occurring in 

 the trap rocks of Moeraki and Otepopo, and E. Daintree, Esq., F.Of.S. 

 (Trans. N.Z. Inst., vol. vii., p. 458), in speaking of a granite rock from the 

 • Snowy Peak Eange, Canterbury, says : — " There is a yellowish mineral 

 with a fibrous radial structure seen both in the specimen and the section. 

 It is evidently a secondary formation, filling spaces between the constituents. 

 It is probably prehnite. 



Natrolite, .J^ Si 2 + Na Si + 2 H. — The occurrence of this mineral 

 in vesicular basalts near Dunedin is mentioned by Dr. Hector (Jurors' Eep. 

 N.Z. Ex., 1865, pp. 267 and 438), and in the volcanic rocks of Banks 

 Peninsula, by Dr. v. Haast (Jurors' Eep. N.Z. Ex., 1865, p. 257). It is 

 also mentioned in the old catalogues of the Otago Museum as specimens 

 from Oamaru in trachyte, from Mount Livingstone and from Look-out 

 Point. There are numerous specimens of this mineral in the collection of 

 the Colonial Museum, in cavities in the basalts from Dunedin. They are 

 arranged in beautiful little tufts of fine acicular crystals, sometimes alone, 

 and sometimes on chabasite ; in other specimens they are massive but 

 mammillated, and in others they are composed of short rhombic prisms with 

 pyramidal ends, but these also occur in tuft-like groups. There is also a 



