physa Bristovii, Middle Purbeck.
"The Student's Elements of Geology"
Sir Charles Lyell
The shells in these cases belong to freshwater genera, such as Limnaea, physa, Planorbis, Cyclas, and others, differing from European species, but the same as those now proper to ponds and lakes in the same parts of America.
"The Antiquity of Man"
Charles Lyell
The northernmost find of such animals now known was made by Von Middendorff, who found a species of physa on the Taimur Peninsula.
"The Voyage of the Vega round Asia and Europe, Volume I and Volume II"
A.E. Nordenskieold