00948cam a22002651 4500 agr41000229 DLC 20260227110959.0 751124s1940 xx ca 000 0 eng agr41000229 (OCoLC)1850378 DLC OAkU DLC premarc QL517.1 .B42 Betten, Cornelius, 1877- The Francis Walker types of Trichoptera in the British museum, re-described and figured by Cornelius Betten ... and Martin E. Mosely. London, Printed by order of the Trustees of the British museum, 1940. ix, 248 p. front. (port.) illus. 26 cm. At head of title: British museum (Natural history) Includes bibliographies. Caddisflies. Walker, Francis, 1809-1874. Mosley, Martin Ephriam, joint author. British Museum (Natural History) 10098 10098