Planktology on the Pacific Coast

Abstract

THE school of marine planktologists at the University of California and the biological station of La Jolla (San Diego) is doing notable work on the Pacific under the expert guidance of Profs. Ritter and Kofoid. We now welcome a recent contribution on the classification and vertical distribution of the Chætognatha of the San Diego region, by Ellis L. Michael (University of California Publications in Zoology, vol. viii., no. 3). To begin with, the material is evidently very abundant. The locality in question shows seven out of the eighteen valid species of Sagitta, two of the three species of Eukrohnia, and one of the two species of Spadella. The author has done good work in redescribing and elucidating those species, and is to be congratulated on having failed to discover any new ones. The work has been confined to a comparatively small area, but it is evident that no pains have been spared to make it complete.