The Tunicata of the Scottish area: their classification, distribution and ecology: Part II. Sedentary Tunicata (contd.) Order Ptychobranchia (part) (Families Styelidae and Botryllidae)
Thompson, H. (1931). The Tunicata of the Scottish area: their classification, distribution and ecology: Part II. Sedentary Tunicata (contd.) Order Ptychobranchia (part) (Families Styelidae and Botryllidae). Fisheries, Scotland, Sci. Invest. 1: 1-46 + plts. 9-16
In: Fishery Board for Scotland. Scientific Investigations. Her Majesty's Stationery Office: Edinburgh, more
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