354 T. W. E. DAVID, F. B. GUTHRIE, AND W. G. WOOLNOUGH. 



with that of Kosciusko is quoted by us later on from Mr. Hogg's 

 paper. From " Cat's Ears " on the main island, Mr. Hogg has 

 described 1 a hornblende phonolite, (not unlike apachite, authors) 

 containing sanidine, hornblende, nepheline, augite, apatite and a 

 little sphene. 



In the presence of hornblende some of these phonolites approach 

 the apachite (Osann) of the Apache Mountains, and in the pre- 

 sence of olivine the phonolitic nephelenite, (bordering on the 

 nepheline-basalts) of the Katzenbuckel in the Odenwald, Baden. 

 In their low silica percentage, 51-15-52-30 they resemble the 

 Kosciusko tinguaite, as will presently appear. 



New Zealand. — The late Professor Ulrich of Dunedin, New 

 Zealand has described 2 a very interesting group of phonolites from 

 the neighbourhood of Dunedin at Portobello, and also at Pine Hill 

 and Parakanui Cliffs, the first locality twelve miles east of 

 Dunedin, and the second close to the town, and the third eighteen 

 miles north of it. Structurally, Professor Ulrich differentiates 

 them into (1) a coarsely porphyritic rock, and (2) a dense compact 

 rock ; and mineralogically into (a) nephelinitoid phonolites, and 

 (b) trachytoid phonolites. Through accession of plagioclase, and 

 either absence or presence of olivine, varieties of this rock graduate 

 respectively towards tephrite on the one hand and basanite 

 {Rosenbusch) on the other. 



A. Wichmann 3 has described a nepheline rock under the name 

 foyaite from Yiti Levu, Fiji. This was collected by Klein- 

 schmidt from Muanivatu and Koro Yalewa. This rock consists 

 of orthoclase, a little plagioclase, fresh nepheline largely converted 

 into zeolites, augite, apatite, biotite, magnetite, titanite, and 

 titaniferous iron. 



1 Op. cit., p. 212. 



8 On the occurrence of nepheline-bearing rocks in New Zealand, by 

 Professor George H. F. Ulrich, f.gls., Director of the School of Mines, 

 Dunedin. — Austr. Ass. Adv. Sci., Vol. in., pp. 127 - 150, pi. v. 



3 Tschermak's Min. u. petr. Mitth. v., 1882, 14. 



