XVI LLST OF ILLUSTKATIO^S. 



PAGE 



91. Section through a calcareous Sponge, showing the simple 



central Cavity ; J, the Sponge in an uninj ured State 



(after Haeckel) , . . . 342 



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



93. S/M/iffia caHilaginea, Esper ... ... 344 



94. Enioconclia mirahilis, Miiller . ..... 348 



95. Two undesoribed Species of Eulima . . . . 351 



96. Cladog aathus dorsalis, Brichson ... . . 366 



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



98. Section of Eyes .... 370 



99. Section of the Dorsal Eyes of Onchidiitm verrucnlatiim . 371 



100. Periophthalnms A'tf(?J;««i(;?'i, aFish which pursues the Onchidium 373 



101. Development of the Eyes of OiicJiidium .... 378 



102. Grasshoppers protected by their lil^eness to Leaves . . . 383 



103. a, Doliops sp., mimics h, Paohyrhynchus arbifcr \ r, Doliiips 



curcidionidcs, mimics d, Pachyr/iyiichussp. ; c, Scepastns 

 ]>nc7njr/iyncJwides (a, Grasshopper}, mimics/", Apocyrtiis; 

 g, DoUops sp., mimics li, Pachyrhynchns sp. ; i, Pkvr- 



aspis sp. (a Grasshopper), mimics It, a Coccinella . 390 



104. Spiders which mimic Ants . 391 



105. u, Jthysota Antonii, mimicked by h, Xesta miiidanaemis ; c, 



Helicarioii tigrimis, miinicked by d, Xosta Oiimingi 395 



106. Myxicwla iiifuiidibuliim (after ClaparMe) . .... 401 



