Abstract
Mysids were collected on the coast of Departamento del Magdalena, Colombia, in May-July 1973 with a light detritus sledge, by diving and using a small hand net, or by washing corah etc.
The following new species are described and figured: Amathimysis cherados, A. polita, Mysidopsis bispinulata, M. robusta, M. virgulala, Heteromysis elegans, and Heteromysis sp. A.
A revised diagnosis of Amathimysis Brattegard, 1969 is given.
Bowmaniella cf. dissimilis (Coifmann), and B. sewelli Brattegard, are recorded for the first time from the area.
Supplementary information on ecology and biology is given for the following species: Siriella chierchiae Coifmann, Anchialina typica typica (Kröyer), Erythrops parva Brattegard, Amathimysis gibba Brattegard, Brasilomysis castroi Băcescu, Cubanomysis jimenezi Băcescu, Metamysidopsis swifti Băcescu, Mysidopsis ankeli Brattegard, M. cultrata Brattegard, M. cf. mortenseni W.M. Tattersall, M. taironana Brattegard, M. tortonesei Băcescu, M. velifera Brattegard, Promysis atlantica W.M. Tattersall, Parvimysis bahamensis Brattegard, Mysidium columbiae (Zimmer), M. integrum W.M. Tattersall, Heteromysis moyana Brattegard, and Mysidella minuta Brattegard.