POSTSCRIPT.
While the last sheets of this work were going through the press, I received a letter from Mr.
Nils Odhner informing me that he had been able to compare specimens of Cumanotus beavmonti from
Plymouth and of Gv/mcmotus laticeps from Norway, with the result that he regards the two species as
identical.
AD LARD SON, 1MPB., LONDON
