ENGLISH UPPER SILURIAN OSTRACODA. 155 



Ostracoda, 12 species, including Primitia variolata, 

 Bythocypris concinna, and B. jmstulosa. 



37. Herefordshire Beacon, half a mile west 

 from base. — Bluish-green shale, with minute scales 

 of mica, angular quartz-grains, white and red aggre- 

 gates of crystalline calcite, hornblend, clear and 

 opaque calcite, some well-rounded quartz-grains, 

 felspar, obsidian or pitch-stone, and minute particles 

 of black scoriaceous lava. One small Brachiopod 

 was obtained. 



Ostracoda, 4 species. 



Silurian Shales and Limestones in which no 

 Ostracoda were detected. 



38. Dolyhir, near Old Radnor. — Dark-blue shale, 

 with minute mica-scales, small aggregates of crystal- 

 line calcite, minute crystals of carbonate of copper, 

 particles of mica-schist, small masses of dog-tooth 

 spar, spangles of pyrite, and very bright quartz- 

 grains. This was a very remarkable shale. There 

 was nothing organic found in it except one or two 

 species of Crinoids (large and frequent), and frag- 

 ments of a Trilobite. 



39. Nash, two miles south from Presteign, Rad- 

 norshire. — Decomposed yellowish shale, with some 

 transparent crystals of calcite, fragments of mica- 

 schist, white angular pieces of limestone, and angu- 

 lar bits of vitreous quartz. This gathering contained 

 nothing organic. 



40. View Edge, near Craven Arms, Shropshire. 

 — This locality is rather pictui'esque, being situated 

 at the end of the long valley that runs between the 

 Longmynd Hills and Wenlock Edge Escarpment. It 

 rises several hundred feet above the valley, and has 

 evidently been protected from denudation by the 

 thick beds of Aymestry Limestone that crown its 

 summit. The shale above this limestone was of a 

 yellowish colour, and from it were got clear crystal- 

 line calcite, small aggregates of calcite, some scales 

 of brown mica, and very minute scales of white 



