Xviii LIST OF ILLUSTRATIONS. 



MAY. — Chapter YI. 



Melicerta ringexs 91 



Epistylis 95 



Carchesium 96 



JUNE AND JULY.— Chapter YII. 



(ECISTES CETSTALLINUS 102 



Philodina 104-5 



AUGUST.— Chapter VIII. 



Crypto MONADS 117-18 



Teiarthra 120 



Brachions 122 



SEPTEMBEE.— Chapter IX. 



scaridtum longicaudum 133 



Stephanoceros eichornii 135 



OCTOBER.— Chapter X. 

 Stentors 145 



LiMNIAS ceratophylli 149 



Yaginicola 152 



NOYEMBER.— Chapter XL 



Pluiiatella eepens 159 



" " (Single Polypide enlarged) . . . 163 



DECEMBER.— Chapter XII. 



Water-Bear 173 



Trachelius ovum 180, 183 



