Title
XLIX.—On the Calcispongiæ, their position in the animal kingdom, and their relation to the theory of descendence
By
Haeckel, Ernst, 1834-1919
Original Publication
The Annals and magazine of natural history; zoology, botany, and geology
Published by
London Taylor and Francis, Ltd
Identifiers
BioStor:
https://biostor.org/reference/92506
DOI:
https://doi.org/10.1080/00222937308696846