EXPLANATION OF PLATES. 89 



Plate XIX. 



Fig. 1. Verrucaria lavata, Ach. (p. 44.) 



A. Vertical section of thallus and apothecium. b. Sporidia. 

 c. Ascus with enclosed sporidia. . Apothecia. 



2. Verrucaria lavata, Ach. (p. 44.) 



A. Vertical section of thallus and apothecium. b. b. Sporidia. 



3. Verrucaria murina. (p. 44.) 



A. Vertical section of thallus and apothecium. b. Sporidia. 



4. Verrucaria Harrimamii, Ach. (p. 45.) 



A. Vertical section of thallus and apothecium. 



5. Verrucaria plumheay Ach. (p. 45.) 



A. Vertical section of thallus and apothecium. b. Sporidia. 



Plate XX. 



Fig. 1. Verrucaria muralis, Ach. (p. 46.) 



a. Vertical section of thallus and apothecium. b. Sporidia. 



2. Verrucaria litoralis, Tayl. M.S. (p. 46.) 



A. A. Vertical section of thallus and apothecium. b. Apothe- 

 cium. c. Sporidia. 



3. Verrucaria gemmif era, Tayl. (p. 47.) 



A. Vertical section of thallus and apothecium. b. Sporidia. 

 c. Asci with enclosed sporidia. 



4. Verrucaria gemmif era ^ Tayl. (p. 47.) 



A. Vertical section of thallus and apothecium. n Sporidia. 



