Cox. — On the Mineralogy of New Zealand. 381 



Caleite. — Thames. The terminal end of a large scalenohedron on which 

 an incrustation of small rhomhohedral crystals has formed. 



Caleite with Aragonite. — Seacliff, near Waikouaiti. A number of small 

 obtuse rhombohedrons built up, one on the other, giving the whole crystal 

 the appearance of a hexagonal prism with serrated edges, and with terminal 

 rhombohedral planes. It is in a cavity in basalt. 



Caleite. — Seacliff. A similar specimen to the last, but less perfect. 



Caleite. — Cape Eodney. A block of white rhombohedral crystals of 

 large size. 



Smoky Caleite. — Cape Eodney. A slab of beautiful rhombohedral 

 crystals of caleite of a smoky colour. 



Caleite (Dogtooth Spar). — Tararu Creek, Thames. A large slab of 

 breccia with acute rhombohedral crystals of a pale yellow colour on the 

 face. 



Massive Crystalline Caleite. — In this form caleite is of common occur- 

 rence as veins traversing many different sorts of rocks. It notably occurs 

 in the slate of the Tokatea Eange at Coromandel, and in the mines of the 

 Thames, where, owing to its decomposition in contact with acids, the car- 

 bonic acid gas is formed which is found in such large quantities at the lower 

 levels of the mines, sometimes rendering futile all attempts at ventilation. 

 It is also frequently met with as large veins in the Maitai limestone of lower 

 carboniferous age both in Nelson and Otago, and again associated with the 

 crystalline marbles of the West Coast and Collingwood. It has also been 

 found, under most interesting circumstances, in some of the granites of the 

 West Coast Sounds, where it occurs as large rhombohedral masses entering 

 into the composition of the rock as an accessory mineral. 



Marble. — Some very fine deposits of marble occur in New Zealand, in 

 Caswell and Milford Sounds on the West Coast, as mentioned by Dr. 

 Hector (Eeport of Explorations of West Coast of Otago, "Provincial 

 Gazette" and Jurors' Eep. N.Z. Ex., 1865, p. 8), and in the former 

 locality a quarry has been opened out by a newly-formed company. The 

 better varieties are of a pure white colour and saccharine texture ; they are 

 reported by Mr. McKay to occur moderately free from joints, and to be 

 obtainable in large blocks (Geol. Eep., 1880-81, p. 115). There is also 

 a coarser crystalline variety, as well as a black-veined marble, which occurs 

 in considerable quantities. Marble of good quality again occurs at Colling- 

 wood and on the Eiwaka Eange between Takaka and Motueka, and 

 a crystalline limestone, frequently called marble, is also found associated 

 with the lower carboniferous rocks, and is met with in Nelson ; the 

 Blue Mountains, near Palmerston, Otago ; and in the Clent Hills, 

 Canterbury. 



