THE CARBONIFEROUS LIMESTONE OF BURRINGTON COMBE 19 
sp. and abundant Ostracods. Brachiopods, which are 
comparatively rare, include Eumetria sp., Ghonetes cf. 
hardrensis, Camarotoechia mitcheldeanensis and Orthotetes 
aff. crenistria. 
In the lowest series of thin limestones, Cliothyris Royssii 
var., and Ghonetes cf. hardrensis are abundant, and are 
associated with Orthotetes aff. crenistria, Spirifer aff. 
clathratus and Gamarotoechia mitcheldeanensis. 
The “ Bryozoa Bed,” about 150 feet above the top 
of the Old Red Sandstone, consists of red limestones 
crowded with Rhabdomeson sp., and containing Spirifer 
aff. clathratus, Orthotetes aff. crenistria and Ghonetes cf. 
hardrensis. 
Ghonetes ‘ Buchiana ’ and Productus cf. bassus have 
only teen found in the middle part of the zone. 
Orthotetes aff. crenistria and Ghonetes cf. hardrensis are 
abundant at various levels throughout the zone. 
Spiriferina octoplicata is apparently rare : only two 
specimens have been recorded, from the middle and upper 
parts of the zone respectively. 
Rhipidomella aff. Michelini first appears in the upper part 
of the zone, and increases in abundance as we approach 
the Zaphrentis Zone. 
Spirifer aff. clathratus and var. are comparatively rare 
in the lowest limestones ; become commoner as we ascend ; 
and are extremely common at the top of the zone. 
Syringothyris aff. cuspidata, Gliothyris glabristria and 
Productus cf. Martini appear near the top of the zone. 
Remarks and comparison with the Bristol Area. 
The exposure of the beds is unsatisfactory throughout 
the zone, particularly in the upper and middle parts. 
The passage into the Zaphrentis Zone is not exposed at 
all, and the fossils recorded from this level were obtained 
by excavating on the hillside. The knowledge of the 
