Abstract

CORYNOTRYPA FROM THE UPPER PENNSYLVANIAN OF NEBRASKA

BY G. E. CONDRA AND M. K. ELIAS

A new species of Corynotrypa is found adnate on Pinna from the Shawnee and Wabaunsee groups in Nebraska. Previous range of the genus from the lower Ordovician to the Devonian is thus extended to the top of the Pennsylvanian, but it remains unknown in the Mississippian.

DOUBLEBASKET-LIKE BRYOZOAN-ALGAL CONSORTIUM OF PERMIAN AGE

BY G. E. CONDRA AND M. K. ELIAS

A new bryozoan-algal symbiotic consortium is recorded from the Kaibab limestone at Grand Canyon, Arizona. It consists of a basket of Polypora type thickly encrusted from behind by algal tissue and interconnected with an inner, less regular, basket built by the same algal tissue and parallel to the outer basket. The algal meshwork resembles that of the living red algae Liagora and, particularly, Marchesettia spongiodes, which lives in a consortium with a sponge.

HEDERELLA FROM . . .

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