R.  Hartmeyer, ?Ascidien (continuation of work by Seeliger)?, in: Bronn, H.G. Klassen und Ordnungen des Tierreichs. Leipzig. C.F. Winter (Abstract, repeating lists of species by Schepotieff, A. 1911, in Archives de Zoologie Experimentale et Generale, vol. 6:3-27, vol. 3, supplement, pp. 1281-1772, 1910.