by Maynard Mayo Metcalf
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An outline of the theory of organic evol...
Contributions to the biology of the Phil...
Opalina
The opalinid ciliate infusorians
The Salpidae
The Salpidae collected by the United Sta...
Salpae
Extrait d'un mémoire sur l'organisation ...
Cyclomyaria et Pyrosomida
Etudes anatomiques et embryogéniques sur...
Pyrosomes et appendiculaires provenant d...