92 



NATURAL HISTORY 



Class T 



Arc>2ia]f7r?elicCa 



Polygordlius 



cMass "K 

 Cl2aetopocCa 



Nsreis Chaetoptert£5 



c\ccro..^»/'or-m. tube vorm. (^3) 



ANNELIDA 



segmentecC "^orms 



KirucCo 

 •■medicinal leech 



Class HL 



Hirudinaa 



Lambricud 



Garthvorm 1 



fhaecolosoTQa 



arrow vorm 



Class sr 



Csrephyrea 



Cla&S"y 



Chaetognatha 



