Polychaetous annelids

Pt. 2 "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, and in 1938" -- On cover.

AHFPUB03016AHFPUBPE0703AHFPUBPE0703016PolychaetaRV Velero III Cruiser