LIST OF ILLUSTRATIONS 



97. 

 98. 

 99. 

 00. 

 01. 

 02. 



03- 



04. 



05. 

 06. 



II. 

 12. 



13- 



14. 



IS- 

 16. 



17- 

 18. 



19. 



20. 

 21. 



22. 



23- 

 24. 



25. 



26. 



27. 

 28. 

 29. 

 30. 

 31. 



FIGURE 



96. A Planarian cut transversely into nine pieces .... 



A Planarian which has been divided into two by a longitudinal cut 



The leg of a Crab, adapted for self-mutilation or autotomy 



Regeneration of the lens in a Newt's eye .... 



Regenei-ation of Planarians ...... 



A Starfish arm ......... 



Brush and comb on the leg of a Bee 



Claw on the leg of a 'Beach-fly' 



Digging leg of the Mole-cricket 



Ovary of a fertile Queen-Ant and ovaries of a Worker 



Three Workers of the same species of Indian Ant 



07 A, B. Larvaof a Caddis-fly 



07 C. Leptocephalus stage of an American Eel 



08. Nauplius larva of one of the lower Crustaceans . 



09 A, B. Metamorphosis of one of the higher Crustacea, a Shrimp 



09 C. Second Zoaea stage 



09 D, E. Mysis-stage and fully-formed Shrimp 

 10. The largest of the Daphnids (Leptodora hycdina), with summer ova 

 beneath the shell 



Nauplius larva from the winter egg of Leptodora hijalina . 



Development of the parasitic Crustacean SaccuUna carcini 



The two sexes of the parasitic Crustacean CJiondracanthus gibhosus 



Zosea-larva of a Crab 



Caterpillar of the Humming-bird Hawk-moth Macroglossa steUataruni 



Development of the eye-spots in the caterpillar of the Elephant 

 Hawk-moth Ch<erocampa elpenor 



Caterpillar of the Bed-straw Hawk-moth DeilepMla gain . 



Two stages in the life-history of the Spurge Hawk-moth Deilephila 

 euphorbicB 



Caterpillar of the Poplar Hawk-moth Smerinthiis popiiU . 



A, Symmetrical, and B, asymmetrical curve of frequency . 



Life-cycle of Coccidium Jithohii 



Conjugation of a Coccidium {Adelea orafa) 



Conjugation of Coccidium pro2)rinm 



Alternation of generations in a Gall-wasp .... 



The two kinds of galls formed by the species . 



Ovipositor and ovum of the two generations of the same species 

 of Gall-wasp 



Life-cycle of the Vine-pest {FhyUoxera vafttatrix) 



Heterostylism ......... 



Aberration of Arciia caja, produced by low temperature . 



Skeleton of a Greenland Whale, with the contour of the body 



Peridineae : species of Cerathtm 



168, 



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182 

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 825 



