LIST OF ILLUSTRATIONS 



nSUKE 



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



97. A Planarian wliicli has been divided into two by a longitudinal cut 



98. The leg of a Crab, adapted for self-niutiktion or autotomy 



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



100. Regeneration of Planarians 



loi. A Starfish arm 



102. Brush and comb on the leg of a Bee ..... 



103. Claw on the leg of a ' Beach-fly ' 



104. Digging leg of the Mole-cricket 



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



106. Three '^^'orkei-s of the same species of Indian Ant 



107 A, B. Larva of a Caddis-fly 



107 C. Leptocephalus stage of an American Eel 



108. Nauplius larva of one of the lower Crustaceans . 



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



109 C. Second Zosea stage 



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



no. The largest of the Daphnids (Leptodora hi/aliiia), with summer ova 



beneath the shell 



111. Nauplius larva from the winter egg of iyejj^o(7o)-a 7i(/aZiHO . 



112. Development of the parasitic Crustacean Saccub'iKi carelni 



113. The two sexes of the parasitic Crustacean CJiondmcrmthus gibhosiis 



114. Zosea-larva of a Crab 



115. Caterpillar of the Humming-bird Hawk-moth Macroglossa stellatarum 

 n6. Development of the eye-spots in the caterpillar of the Elephant 



Hawk-moth Chwrocampa elpenor 



117. Caterpillar of the Bed-straw Hawk-moth Z)ei7ep'i'7ff (/«Z/i . 



118. Two stages in the life-history of the Spurge Hawk-moth DeUephila 



euphorhicE ........... 



119. Caterpillar of the Poplar Hawk-moth &»«•/«*/»»« jjojjff?/ . 



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



121. Life-cycle of Cocddium lithdbii .....■• 



122. Conjugation of a Coccidium {Adelea oi'ota) 



123. Conjugation of Coccirf/wOT^ro^jrfKMj 



124. Alternation of generations in a Gall- wasp 



125. The two kinds of galls formed by the species 



126. Ovipositor and ovum of the two generations of the same species 



of Gall-wasp 



127. Life-cycle of the Vine-pest (PliyUoxera rcistatrix) . . . . 



128. Heterostylism 



129. Aberration of .4ic^'a co/fl', produced by low tempei-ature . 



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



131. Peridinese: species of Cwa/f^w 



168, 



6 



14 



17 



21 



25 



27 



s4 



S.5 



S6 



91 



97 



105 



13.3 



161 



162 



163 



164 



166 

 167 

 242 

 170 

 171 

 178 



180 

 ISl 



182 

 184 

 207 

 214 

 216 

 218 

 245 

 246 



247 

 249 

 254 

 276 

 313 

 325 



Digitized by Microsoft® 



