236 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XX. 



Figs. 1-6, and 11-14, drawn with Abba's camera lucida, obj. Leitz ^, 



ocular No. 3. 

 Figs. 7-10 drawn with Abbe's camera lucida, obj. Leitz \, ocular No. i. 



Porphyra leucosticta. 



Fig. irt. Surface view of vegetative part of frond. 



Fig. \b. Cross-section of vegetative part of frond. 



Fig. ia. Surface view of sporocarpic part of frond. 



Fig. lb. Cross-section of sporocarpic part of frond . 



Fig. 3«. Surface view of antheridial part of frond. 



Fig. },b. Cross-section of antheridial part of frond. 



Porphyra perforata. 



Fig. 4«. Surface view of vegetative part of frond. 

 Fig. 4(^. Cross-section of vegetative part of frond. 

 Fig. 5«. Surface view of sporocarpic part of frond. 

 Fig. ^b. Cross-section of sporocarpic part of frond. 

 Fig. 6. Cross-section of antheridial part of frond. 



Figs. 7-10. Cells of the base, showing hypha-like projections; after treatment 

 with Schulze's Macerating Fluid. 



Porphyra nereocystis. 



Fig. ii«. Surface view of cells of vegetative and sporocarpic part of frond. 



Fig. lib. Cross-section of vegetative part of frond. 



Fig. 11c. Cross-section of sporocarpic part of frond. 



Fig. 12. Cross-section of antheridial part of frond. 



Porphyra amplissima. 



Fig. 13a. Surface view of antheridial and sporocarpic part of frond. 

 Fig. 136. Cross-section of antheridial and sporocarpic part of frond. 



Porphyra miniata f. cuneiformis. 

 Fig. 14. Cross-section of antheridial and sporocarpic part of frond. 



