LIST OF ILLUSTRATIONS 



144. 

 145. 

 146. 

 147. 

 148. 

 149. 

 150. 

 151. 

 152. 



'S3- 

 154. 



'55- 

 156. 



'57- 

 158. 



'59- 

 160, 

 161. 

 162. 

 '63. 

 164. 

 165. 

 166. 

 167. 

 168. 

 169. 

 170. 

 171. 

 172. 



'73- 

 174. 



'75- 

 176. 

 177. 

 178. 

 179. 

 180. 

 181. 



Carpet beetle, larva, and pupa 



Culex and larva 



Internal organs of cockroach 



Periplaneta, its tracheal system 



Periplaneta, nervous system 



Honey bee, queen, worker, and drone 



Red ant, male, worker, and female 



Euscorpio .... 



Scorpion, ventral side . 



Scorpion, internal organs 



Epeira diadema . 



Cattle tick .... 



Itch mite .... 



Limulus, ventral view 



Anodonta cygnea, entire animal 



Anodonta cygnea, right valve, and animal 



Anodonta, section of shell and mantle 



Anodonta cygnea, animal . 



Anodonta cygnea, dissection from left side 



Anodonta cygnea, sections of gills 



Anodonta, diagram of circulatory system 



Anodonta, embryo and glochidium 



Mytilus edulis 



Teredo navalis 



Chiton spinosus ..... 



Chiton^ ventral view .... 



Chiton, nephridial and genital systems 



Helix nemoralis ..... 



Triton nodiferus, shell 



Triton nodiferus, median section of shell 



Solarium perspectivum, under side 



Terebra oculata, shell 



Cypraea moneta, animal expanded, in its shell 



Doris tuberculata 



Shell-bearing Pteropoda 



Patella vulgata, animal, ventral view 



Limax, lung-cavity, etc. 



Triton nodiferus .... 



