Notes on Bryozoa, 1. Cupuladria canariensis from the British Pliocene Coralline Crag

British Coralline Crag Cupuladria specimens referred to C. biporosa Canu & Bassler, 1923 are similar to European Continental Mio-Pliocene Cupuladria specimens described as C. canariensis cavernosa 1979. This Mio-Pliocene Cupuladria is in many aspects an intermediate form between C. biporosa and C. canariensis. The application of a name is therefore somewhat arbitrary. Measurements of the area enclosed within the frontal outline of a zooecium give hardly more consistent data for description of this Cupuladria material than conventional length and width measurements.