Fourteen species of erect, reticulate bryozoans are described and illustrated with SEM micrographs. Nine species introduced by P. H. MacGillivray and two by T. Hincks are included; their taxonomic status is stabilized by the selection of type specimens. A new species is described in each of the genera Triphyllozoon and Reteporellina. Dictyochasma gen. nov. is introduced for D. janus sp. nov.