STUDIES ON MARINE BRYOZOA. XIII. TWO NEW GENERA AND NEW SPECIES FROM ANTARCTICA

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Abstract
1. Two new genera, Toretocheilum and Isoschizoporella, of the family Hippoporinidae (Bryozoa, Cheilostomata) have been erected on the basis of their orifices and areolated frontal walls. 2. One new species, Toretocheilum absidatum, was described. Another, Schizoporella tumida var. tricuspis Calvet 1909, was elevated to species rank and transferred to a new genus: Isoschizoporella tricuspis. 3. Both species are amply illustrated, measurements given and the description for I. tricuspis has been amplified. Attention is given to the range of variation of each species. 4. Each species is designated as the genotype of its new genus. Both species are from Marguerite Bay, Antarctica.

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