TO 



PROFESSOR R. E. GRANT, M.D., 



r.R.s., r.E.s.E., r.L.s., p.g.s., p.z.s., etc., 



PROFESSOE OV COMPAKATIVE ANATOMY AND ZOOLOGY IN UHIVEESITI! COLLEGE, LONDON, 



ETC., ETC., 



%\h Mmt is §t)imttis, 



WITH THE MOST SINCEEB RESPECT 



EOR HIS PBOEOTJND KNOWLEDGE OP NATURAL HISTORY IN GENERAL, 



AND ESPECIALLY POR THE LUCID AND ABLE MANNER 



IN WHICH HE LED THE WAY IN THE SAME PIELD OP INVESTIGATION AS THAT 



OP THE PRESENT WORK, 



AND WITH MUCH GRATITUDE POR THE KIND ADVICE 



AND LIBERAL ASSISTANCE THE AUTHOR HAS RECEIVED PROM HIM 



DURING THE COURSE OP ITS PREPARATION. 



