PROF. DENDY'S memoir (in Acta Zoologica, 1921, pp. 95-152, 50 figures) on the evolution of the tetraxonid sponge-spicule will appeal equally to those interested in problems of evolution or in ...
All adult specimens of Anheteromeyenia ryderi sampled from May to August possessed spermatic cysts; no female reproductive elements were observed. The presence of numerous post-larval specimens on ...
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