B. I.  Brewin, ?Ascidians of New Zealand.  Part VI  Ascidians of the Hauraki Gulf.  Part II?, Transactions of the Royal Society of New Zealand, vol. 79, no. 1, pp. 104-113, 1951.

T.  Tokioka, ?Contributions to Japanese ascidian fauna IV. Notes on some ascidians collected in Osaka Bay?, Publications of the Seto Marine Biological Laboratory, vol. 1, no. 4, pp. 11-24, 1951.