The phyla Sipuncula and Echiura,

Stephen, Alexander Charles, 1893-1966.

The phyla Sipuncula and Echiura, by A. C. Stephen and S. J. Edmonds. - London, British Museum (Natural History), 1972. - vii, 528 p. illus. 26 cm. - [British Museum (Natural History)] Publication no. 717 . - Publication (British Museum (Natural History)) no. 717. .

Includes index.

Bibliography: p. 474-508.

0565007173

74176631

GB73-05714


Sipuncula.--Zoology
Echiura.--Zoology

QL391.S5 / S8 1972

595/.17