366 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Juiie 19, 



blende. From a small dyke, of which only a width of a few feet is 

 exposed on the ridge running east and west, about fifty yards west 

 of the trap-mass next mentioned. 



LXXIY. Prom an irregular mass, a quarter of a mile from the 

 cave, and to the north-east of it. It contains hornblende, yellowish 

 red orthoclase, and felspar with the iridescent appearance of labra- 

 dorite. G=2-935. 



LXXV. Trap hear the base of the large east buttress. TJncrys- 

 tallized, separates into rhomboidal fragments with smooth surfaces, 

 which are stained red in places by anhydrous peroxide of iron. 

 G=2-816. 



LXXYI. From the same place, in immediate contact with bedded 

 petrosiliceous rock. No distinct crystals. G =2-956. 



LXXYII. Trap south of the ravine below Wind's Point, north- 

 east of the keeper's lodge. Greenish black ; hornblende, greenish 

 felspar, and a little haematite. G= 2-939. 



LXXYIII. Felspathic portion of the rock last mentioned. Dull 

 green to greenish yellow, waxy or greasy lustre, softer than felspar, 

 contains water, analogous to labradorite. A green mineral of a 

 similar character is common in the trap- dykes throughout the chain, 

 especially in those of the Herefordshire Beacon. The labradorite 

 in basalt has a similar character. It could not be entirely separated 

 from the augitic parts of the rock. 



LXXIX. Smooth amygdaloidal trap or lava, containing epidote 

 in vesicular cavities, .from the oifstanding hill overlooking Little 

 Malvern. 



LXXX. Another rock from the same place, and of similar cha- 

 racter, except that the vesicular cavities were filled with carbo- 

 nate of lime, which was removed by diluted acid before the analysis 

 of the rock. 



LXXXI. Trap from the round eminence, midway between the 

 "Wych Cutting and the "Worcestershire Beacon. A confused mixture 

 of hornblende and felspar, the former predominating, and iron 

 pyrites. G=2-994, diminishing near the border to 2-905. 



LXXXII. Crystalhne trap from a dyke crossing the summit of 

 the "Worcestershire Beacon in a north-western and south-eastern 

 direction. Hornblende and yellowish brown felspar. G= 2-949. 



LXXXIII. Felspathic portion of the trap last mentioned, sepa- 

 rated by pounding and washing the rock. Its entire substance was 

 penetrated by the hornblende, with which it was so intimately com- 

 bined that separation from it, even in the smallest fragments, was 

 extremely difiicult. This felspar is partly massive and partly crys- 

 taUized. The angles were too small for measurement ; but the 

 cleavage resembles that of orthoclase. The chemical composition of 

 the portion analyzed does not correspond with the theoretical for- 

 mula of orthoclase, and is nearer that of andesine. 



LXXXIY. Trap from the north-west base of the "Worcestershire 

 Beacon, south of the small stream, part of the same mass as LXXXII. 

 Kot distinctly crystallized ; hornblende and a little white felspar and 

 pyrites. G=2-981, 



