Bryozoa of the Pacific coast of America

Partial contents: pt. 3. Cyclostomata, Ctenostomata, Entoprocta, and addenda; Pt. 3 "reports on the collections obtained by Allan Hancock Pacific Expeditions of Velero III off the coast of Mexico, Central America, South America, and Galapagos Islands in 1932, in 1933, in 1935, in 1936, in 1937, in 1938, in 1939, in 1940, and in 1941, and Velero IV in 1949-1952 off the the coast of Mexico and southern California" -- On cover.