MONOCJTJAFH OF THE 



OKAPI 



^^.^,7--?,'r^ 



8iR E. EAY LANKESTEPv, K.C.B., M.A., D.Sc, F.R.S., 



IKlNoIiAUY FKI,l,<i\V 01'' EXKTHU COJ.LKGK, OXKOIIli ; .MEMlllJi'; ]>K 1,'lNHTITr'i' VF. FIIANCK (aSSOCIE ETRANGEIi 



UK l/ArAM'MIK DES SCIKNCES); EMERITUS I'|;o|.m;SSI>|; iiF /,(Ii)L(1iIV 1\ INIVEltSlTV Crir.LEGE, LONDON; 



I.ATK mUECTOU OF 'I'HE NATl'ltAL IIIS'I'OKV DKI'AUTMENTS OF THE BRITISH MUSEUM; 



I.ATIC I'RESIDEN'J' OF THE lllMTISir ASSOt'IATIOX FOR THE ADVANCEMENT OF SCIENCK ; 



I.ATE FUM.ERIAN PROFESSOR OF PHYSIOLOGY IN THE ROYAL INS'l'lTUTION 



OF GREAT DRITAIN; LATE LINACRE PliOFESSOR OP COMPARATIVE 



ANATDMV AXIi FELLOW OF MKRTOX COLLEGE, OXFORD. 



A ^V T A ^ f 



r\. _L J^j ^^ O (()o-\e^.-^ - see y-^A^J 



(OP 48 TLATES) 



iMPir.ED wnir u'iie assistancf of 



AV. (i. mDKWOOl). 1).S( 



LONDON : 



PRINTED BY ORDER OF THE TRUSTEES 

 OF THE BRITISH MUSEUM. 



sold by LONGMANS & CO., 39, PATERNOSTER ROW, EC; B. QUARITCH, 11. GRAFTON STREET, 

 NEW BOND BTHKKT, W. ; DULAU & CO., LTD., :t7, SOHO SQUARE, \\ . ; 



THE BRITISH MUSEUM (NATURAL HISTORY), CIIOMWELL ROAD, S.W. 



1910. 



[all K ICi H T S R E S E It V e d J 



