130 CARBONIFEROUS CORALS AND BRACHIOPODS 
collection, one being from the horizon of the ‘‘ Bryozoa 
Beds.” 
Ortliotetes {Streptorhynchus of Davidson’s Monograph) 
Orthotetes crenistria, Phill. 
Considering the enormous abundance of this form and 
its mutations in the Carboniferous Limestone series of the 
Bristol area, the number and variety of the specimens in 
the collection are extremely disappointing ; furthermore, 
the few specimens which are preserved in it are all from 
approximately the same horizon, namely, from the “ Lower 
Limestone Shales.” No purpose would be served by a 
detailed description, the only satisfactory specimens being 
examples of those with a strongly convex small valve and 
a markedly resupinate beak- value. 
Orthids. 
Schizophoria : 
Schizophoria resupinata, Martin. 
A single, small but perfect, specimen is in so complete a 
state of preservation as to render the locality “ Clifton ” a 
little doubtful (all the specimens I have seen from the dis- 
trict, where they often occur in thousands, are impossible 
of complete extraction). 
Khipidomella : 
Rhipidomella Michelini, L’Eveille. 
A single valve, and a partially buried example from 
Lower Limestone Shales, Cook’s Folly,” are the only 
specimens in the collection. 
Productids. 
Productus : 
Productus sp. 
This small species has affinities both to Productus acu- 
