CONTENTS. xiii 



CHAPTER XXXVII. 



Divisions of the Arachnida Podosomata Acarina A delarthroso- 



mata Pedipalpi Araneida, ...... 224-230 



CHAPTER XXXVIII. 



Myriapoda General characters of the class Chilopoda Chilog- 



natha Distribution of Myriapoda in time, .... 230-233 



CHAPTER XXXIX. 



General characters of the Insecta Metamorphoses of Insects Sexes 



of Insects, . .. ./.',; 233-241 



CHAPTER XL. 



Divisions of the Insecta Anoplura Mallophaga Thysanura 

 Hemiptera Orthoptera Neuroptera Aphaniptera Diptera . 

 Lepidoptera Hymenoptera Strepsiptera Coleoptera, . 241-252 



CHAPTER XLI. 



General characters of the Mollusca Digestive system Circulatory 

 system Respiratory system Nervous system Reproduction 

 Shell, . 253-257 



CHAPTER XLII. 



Molluscoida Polyzoa Distinctions between the Polyzoa and Hy- 

 drozoa Polypide of the Polyzoa Anatomy of the Polyzoa 

 Reproduction and development Divisions of the Polyzoa. . 258-265 



CHAPTER XLIII. 



Tunicata General characters Development Types of Homolo- 



gies Divisions, ......... 265-270 



CHAPTER XLIV. 

 Brachiopoda General characters Shell Arms Atrial system 



Divisions, . . .' ' ' ; , , 270-275 



CHAPTER XLV. 



Distribution of Molluscoida in space Distribution of Molluscoida in 



time, . . . .- 275-277 



CHAPTER XLVI. 



General characters and divisions of the Mollusca Proper Lamelli- 

 branchiata General characters and anatomy Divisions Fami- 

 lies of the Lamellibranchiata, ...... 278-286 



CHAPTER XLVII. 



Encephala Gasteropoda General characters Development Shell 



of Gasteropoda, 286-290 



