FIG. 40.--Astacus fluviatilis.--The opthalmic and antennulary somites ( x 3). I, opthalmic, and II, antennulary sternum; 1, articular surface for eyestalk; 2, for antennule; epm, epimeral plate; pcp, procephalic process; r, base of rostrum; t, tubercle.
[Editor's note: illustration is reproduced here approximately twice the size of the woodcut in the book.]
Next> | ^Top