Graff and Wheeler).
von Graff, Monographie der Turbellarien (1882); A.
Loven (after Graff).
A second guard lies slumped behind Graff's chair, and the designer himself lies back against the leather headrest of his chair.
Hubrecht, Jenaische Zeitschrift fir Naturwissenschaft (1905), pp. 151-176; (6) Von Graff, Die Acoela, p. 519 (Leipzig, 1891).