18 EXPLANATION OF THE PLATES. 



PLATE LXXX. 



Fig. 1. HcBmatococcus cryptopliylla. Fig. 2. Protococcus 

 nivalis. Fig. 3. HcBmatococcus Allmanni. Fig. 4. Hce- 

 matococcus Hookeriana. Fig. 5. Palmella cruenta. 

 Fig. 6. (a) (b) HcBmatococcus insicjnis. Fig. 7. Sorospora? 

 grumosa. 



PLATE LXXXI. 



Fig. 1. HcBmatococcus frustulosus. Fig. 2. Botrydina vul- 

 garis. Fig. 3. HcBmatococcus alpestris. Fig. 4. Hcema- 

 tococcus murorum. Fig. 5. HcBmatococcus vulgaris. 

 Fig. 6. Hcematococcus granosus. 



PLATE LXXXIL 



Fig. 1. HcBmatococcus rupestris. Fig. 2. HcBmatococcus bi- 

 nalis. Fig. 3. HcBmatococcus csruginosus. Fig. 4. Hce- 

 matococcus furfuraceus. Fig. 5. Hcematococcus lividus. 



Fig. 6. Coccochloris protuberans 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. GlcBoprium dissiliens. Fig. 4. End 

 view of a cell of the same. Fig. 5. GlcBoprium mucosum. 

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

 midium SwartziL Fig. 8. End view of a cell of the same. 

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

 same. Figs. Hand 12. Sphcsrozosma elegans. (Very bad.) 



PLATE LXXXIV. 



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

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



Fig, 1. SphcBrozosma elegans. Fig. 2. Sphcsrozosma 

 excavatum. Fig. 4. Closterium Lunula. Fig. 5. Clos- 

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

 Trigonocystis orbicularis ; a, front view ; b, end view ; 



