There are some pleasing passages in Arnobius, but on the whole he is a tumid and a tedious author.
The leaves, which are borne in pairs at the tumid nodes, are oval in form and have a Dicotyledonous type of venation.
So high as heaved the tumid hills, so low Down sunk a hollow bottom broad and deep, Capacious bed of waters.
In some species certain of the legs bear on their ventral sides furrows with tumid lips and lined by smooth non-tuberculate epithelium; they are called coxal organs, and it appears that they can be everted.
The tentacles surround an area known as the peristome, in the middle of which there is an elongated mouth-opening surrounded by tumid lips.