XIV 



ILLUSTRATIONS 



Fii>iire 



20. The Warty Newt, Malge cristata 



From Gadow. 



21. The Texas Rattlesnake, Cro/a/ws a/roa; 



From Stejneger. 



22. The Duckbill, Ornilhorhynchus anatinus . . . . 



23. The Rock Wallaby with young in pouch, Petrogale xanthopus 

 After Vogt and Specht. 



24. Tamandua Ant-eater, Tamandua teiradactyla 

 From Proc. Zool. Soc. 1871. 



25. The Six-banded Armadillo, Dasypus sexcinctus 

 After Vogt and Specht. 



20. Indian Rhinoceros, Rhinoceros unicornis 

 From Wolf. 



27. The Musk-Ox, Ovibos moschatus . 



28. The Musquash, Fiber zibethicus 



29. The Common Skunk, Mephitis mephitica 



30. Russian Desman, Myogale moschata 



31. Female and young of Xaniharpyia collaris 

 From Sclater. 



32. The Orang-utan, Simia satyrus 

 From a specimen in the Cambridge Museum. 



33. Diagram of digestive and excretory system of the Liver-fluke, 

 Distomum hepaticum ........ 



From Leuckart. 



34. A Sea-lily, Antedon acoela ....... 



After Carpenter. 



35. Horizontal underground stem, or rhizome of Pteris 

 Darwin's Elements of Botany. 



30. Horizontal underground stem, or rhizome of a sedge . 

 From Le Maout and Decaisne. 



37. Stages in the collapse of a cell when immersed in a strong 

 solution •••....... 



After De Vries, modified. 



38. A, Hop twining with the sun; B, Convolvulus twining again-t 

 the sun ........... 



After Payer. 



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