148 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



(common), six pearls, and one tooth of an Archceo- 

 cidaris. 



Ostracoda, 20 species. The rare Beyrichia tuber- 

 culata var. gibbosa, the scarce Primitia valida var. 

 breviata, and Cythere Hollii (the last-named in plenty), 

 were obtained from this gathering. 



17. Ridgend, Woolhope, Herefordshire. — In this 

 quarry there was a large quantity of the white 

 substance noticed as occurring in a thin bed at 

 Coalbrookdale Railway-cutting (No. 8). I collected 

 about 20 lbs. weight of it, and it washed almost 

 entirely away through a buckram bag. In the residue 

 that remained were clear and opaque crystals of 

 calcite, and a minute black coprolite. 



Ostracoda, 6 species, among which were the rare 

 Primitia ornata, the very rare Octonaria faradoxa^ 

 and the rather scarce Macrocypria siliquoides. 



18. Woolliope, Herefordshire (about a mile east 

 from the inn on the Ledbury Road). — This locality 

 was a very small opening in the Woolhope Lime- 

 stone, situated in a wood at a little distance from 

 the road, but I failed to find it on my last visit. 

 Had I succeeded in finding the spot, I have no doubt 

 that I would have increased considerably the list of 

 Ostracoda from it, as individuals were abundant in 

 it; and, when that is the case, a number of rarities 

 are sure to be found, as the Silurian Ostracoda as a 

 class appear to have been eminently social. One 

 never finds a single species abundant to the almost 

 total exclusion of others, as is sometimes the case 

 in the coal measures. The shale was fine-grained 

 and of a bluish colour. Small Brachiopoda were 

 common, Crinoids frequent, and Polyzoa frequent 

 and in beautiful preservation. 



Ostracoda, 35 species, among which were Beyrichia 

 Kloedeni var. intermedia, B, Klcedeni var. subtorosa 

 with big lobe (frequent), the scarce B. lacunata^ 

 Bollia bicollina, B. Vinei, Strepula concentrica, S. 

 irregularis, Primitia umbilicata, P. ornata, the rare 

 Octonaria octoforinis var. intorta, the scarce u^ch- 



