18 EXPLANATION OF THE PLATES. 



PLATE LXXX. 



Fig. 1. Hcematococcus cryptophylla. — Fig. 2. Protococcus 

 nivalis. — Fig. 3. Hcematococcus Allmanni. — Fig. 4. Hce- 

 matococcus Hookeriana. — Fig. 5. Palmella cruenta. — 

 Fig. 6. (a) (b) Hcematococcus insiynis. — Fig. 7. Sorospora ? 

 yrumosa. 



PLATE LXXXI. 



Fig. 1. Hcematococcus frustulosus. — Fig. 2. Botrydina vul- 

 yaris. — Fig. 3. Hcematococcus alpestris. — Fig. 4. Hcema- 

 tococcus murorum. — Fig. 5. Hcematococcus vulyaris. — 

 Fig. 6. Hcematococcus yranosus. 



PLATE LXXXII. 



Fig. 1. Hcematococcus rupestris. — Fig. 2. Hcematococcus bi- 

 nalis. — Fig. 3. Hcematococcus ceruyinosus. — Fig. 4. Hce- 

 matococcus furfuraceus. — Fig. 5. Hcematococcus lividus. 



— Fig. 6. Coccochloris protvberans of the natural size. 

 Figs. 7, 8, 9, 10. The same magnified in different degrees. 



PLATE LXXXIII. 

 Fig. 1. Desmidium cylindricum. Fig. 2. End view of a cell 

 of the same. — Fig. 3. Glceoprium dissiliens. Fig. 4. End 

 view of a cell of the same. — Fig. 5. Glceoprium mucosum. 

 Fig. 6. End view of a cell of the same. — Fig. 7. Des- 

 midium Swartzii. Fig. 8. End view of a cell of the same. — 

 Fig. 9. Desmidium Borreri. Fig. 10. End view of the 

 same. — Figs. Hand 12. Sphcerozosma eleyans. (Very bad.) 



PLATE LXXXI V. 



Fig. 3. Desmidium quadranyidatum : a, front view ; b, end 

 view ; c, two frustules of D. Swartzii for comparison. 



— Fig. 1. Sphcerozosma eleyans. — Fig. 2. Sphcerozosma 

 excavation. — Fig. 4. Closterium Lunida. — Fig. 5. Clos- 

 terium Diance. — Fig. 6. Merismopedia punctata. — Fig. 7. 

 Triyonocystis orbicularis : a, front view ; b, end view ; 



