H. L.  Kesteven, ?Studies on Tunicata no. 1?, Proceedings of the Linnean Society of New South Wales, vol. 34, 1909.

C. P.  Sluiter, ?Die Tunicaten der Siboga-Expedition. Part 2. Die merosomen Ascidien. Siboga-Expeditie?, Siboga-Expeditie, vol. 56B, pp. 1-112, 1909.

R.  Hartmeyer, ?Ascidien (continuation of work by Seeliger)?, In Klassen und Ordnungen des Tier-reichs (H.G. Bronn). Leipzig, vol. 81-98, pp. 1281-1773, 1909.