ENGLISH UPPER SILURIAN OSTRACODA. 151 



Ostracoda, 13 species, including the scarce Moorea 

 Smithii, j^chmina cuspidata (common), ^. bovina 

 (frequent), Maei'ocypris siliquoides, Bythocypris Hollii 

 (frequent), B. reniformis (frequent), B. acina (frequent). 



25. Ledbury, near the Town.— The minute mineral 

 particles and other matter in this shale consisted 

 of some scales of mica (white, brown, and brass- 

 coloured), prismatic calcite, some black scoriaceous 

 lava, a few well-rounded quartz-grains, some fine 

 dovible-pyraraid quartz-crystals, a few grains of 

 green serpentine, some clear and opaque calcite^ 

 three fine transparent pearls adhering together, a 

 small black coprolite, a minute fish-scale, a minute 

 fish-tooth, a Conodont, and Orhulina ? Polyzoa, 

 Crinoids, and small Brachiopoda were scarce. 



Ostracoda, 6 species. 



26. Dog Hill, near Ledbury.— This fine yellowish 

 shale was rich in Ostracoda. In it were some brown- 

 ish magnetic particles, rounded masses of crystalline 

 calcite, small crystals of opaque and transparent 

 calcite, minute scales of mica, and some minute 

 fragments of black scoriaceous lava. Small black 

 coprolites were frequent, and the other organic re- 

 mains consisted of one sea-urchin spine, one spicule 

 of Astrceospongia patina, Roem., and a minute smooth 

 cast of a Bellerophon. As far as my observations 

 have gone, whatever may be the character of the 

 exterior of a Bellerophon, whether grooved or orna- 

 mented, the interior is always uniformly smooth. 

 Small Brachiopoda were frequent, and one pearl 

 was obtained. 



Ostracoda, which were abundant as to individuals, 

 included 29 species. Amongst these we may notice 

 the scarce Beyrichia Klcedeni var. intermedia, B. Mac- 

 coy iana, B. adinixta, Primitia paucipunctata (frequent),. 

 P. obliquipunctata, Thlipsura corpulenta (common), 

 the ubiquitous Xestoleberis corbuloides (common), the 

 scarce Bythocypris phaseolus, and Cytherella Smithii 

 (frequent). 



