350 ArPENDix. 



dark olive-green aiigite crystals and grains, en- 

 closing iron pyrites. — Layers from Captain's 

 Harbour. 



27. Porphyry y weather-worn ; as are also the 

 felspar crystals, which are earthy and greenish- 

 grey. — On the western side of Captain's Har- 

 bour, with No. 18. 



28. Grey-green Porphyry y full of spots of green 

 earth and felspar crystals.. — Under No. 27. 



29. Amygdaloid, The mass by exposure is be- 

 come earthy and greenish-grey, contains cal- 

 careous spar, covered by stilbite. — Layers from 

 Illuluk. 



30. Stones resembling basalt. Brownish black, 

 fine-grained, tolerably hard, lustre glistening, 

 sprinkled in w^ith augite, and porphyrylike in 

 crystals, {Hauy's Pyroxene hemitrope.) Specific 

 gravity 2,701. — From the foot of the so called 

 great volcano on the w^est coast of the island. 



31. Compact liver-brown and bluish-black 

 spotted stone, with fine pointed crystals of a 

 brown-red, very soft, undefinable mineral, and 

 with a finely-sprinkled felspar, in incipient de- 

 composition. Fracture, straight lamellae. Blueish 

 earthy mould covers the surface of the clefts, and 

 red hematite penetrates into the mass from with- 

 out. Specific gravity 2,621. —Layers from the 

 west side of Captain's Harbour. 



32. Yellowish white Clay-stone, with red jasper 



