Quantitative and qualitative analysis of the family Bolivinidae

This paper is part one of a study of Recent foraminiferal faunas collected off the coast of El Salvador. The study is based primarily on 22 core samples taken on two traverses, from depths of 20 to 3,200 meters. Additional data (temperature, pH, oxygen, and salinity) were obtained from bottom-water samples and hydrographic-station samples. Nitrogen values were obtained for the bottom samples and comparative values are taken from unpublished data on cores taken by the U.S. Navy vessel Hannibal off Nicaragua in 1935.