XVI LIST OF ILLUSTRATIONS. 



PAGE 



91. Section through a calcareous Sponge, showing the simple 



central Cavity ; b, the Sponge in an uninjured State 



(after Haeckel) , 342 



92. Spongia cartilagineet, Esper, half nat. size . . . 343 



93. Spottffia cartilaginea, Esper ... ... 344 



94. Entoconclia mirabilis, Miiller 348 



95. Two undescribed Species of Eulima 351 



96. Cladognatlms dorsalis, Erichson 366 



97. Chalcosoma Atlas, from the Philippines ..... 367 



98. Section of Eyes 370 



99. Section of the Dorsal Eyes of Onchidinm rcrruculatuni . 371 



100. Pcrio2)hthalmusKoelreiiteri,&~P\s\i which pursues the Onckidiiim 373 



101. Development of the Eyes of Onclddium .... 378 



102. Grasshoppers protected by their likeness to Leaves . . . 383 



103. a, Dollops sp., mimics b, Pachyrhynckus orbifcr ; r, Doliops 



eurcitlionides, mimics d, PuchyrhyncJiussp. ; c, Sccpastus 

 pachyrhynchoidcs(& Grasshopper), mimics/", Apocyrtus; 

 ff, Doliops sp., mimics k, Pachyrliynchns sp. ; ?', Phor- 



asjris sp. (a Grasshopper), mimics k, a Coccinella . 390 



104. Spiders which mimic Ants 391 



105. a, .nhysota Antonii, mimicked by b, Xesta mindttnacHsis ; c, 



Hclicarion tignnus, mimicked by d, Xcsta Ctimingi 395 



106. Myxu'ola infuiidibuliim (after Claparede) . . ... 401 



