p. Z.S. 1891 Plate X1.IV 



Fiq-1. 



h.. / 



\ / 



c . 





C?"Q^*<^^.-rv..^o; 





^^r.^^'^'^^-^o"^# 



/ 



Fag 2 



MPHi-'kerTith. 



West,lfevvnia:n imii. 



Structure of Ornithorhynchus 



