200 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



PLATE V. 

 J. H. Blake and W. G. Farlow. 



Fig. 1. Leathesia difformis, (L.) Aresch. ; dissection showing a portion of cortical layer: 

 a, a, unilocular sporangia ; b, b, hairs. 400 diani. 



2. Chordaria flagelliformis, Ag. ; longitudinal section of outer part of frond show- 



ing cortical filaments with unilocular sporangia, a, and a few cells of inter- 

 nal layer. 500 diam. 



3. Asperococcus cchinatus, Grev. ; transverse section of frond: a, unilocular sporan- 



gia ; b, hairs. 150 diam. 



4. Stilophora rhizodes, Ag. ; longitudinal section of outer part of frond showing 



sorus with paraphyses and unilocular sporangia. 400 diam. 

 6. Balfsia verrucosa, Aresch. ; vertical section of frond with a sorus containing 



unilocular sporangia. 

 6. Sphacelaria cirrhosa, (Roth) Ag. ; a portion of frond with propagulum. 200 



diam. 



PLATE VI. 

 J. H. Blake and W. G. Farlow. 



Fig. 1. Chorda fllwm, L. ; transverse section of portion of a frond showing paraphyses, 

 6, and unilocular sporangia, a. 200 diam. 



2. Stilophora rhizodes, Ag. ; portion of sorus taken from PI. V, Fig. 4, more highly 



magnified to show unilocular sporangia, a, a', and paraphyses, b. 600 diam. 



3. Ectocarpus littoralis, Lyngb., var. robustus, Farlow; plurilocular sporangia. 



200 diam. 



4. The same with unilocular sporangia. 



5. Myrlonema Leclancherii, (Chauv. ) Harv. ; vertical section showing plurilocular 



sporangia. 400 diam. 



PLATE VII. 

 J. H. Blake and W. G. Farlow. 



Fig. 1. Castagnea virescens, (Carm.) Thuret; unilocular sporangium and hair, b. 400 

 diam. 



2. Castagnea Zosterw, (Mohr.) Thuret ; transverse section of outer portion of frond 



showing plurilocular sporangia, a, a', and hair, b. 400 diam. 



3. Flachistea fueicola, Fries ; dissection of superficial part of frond, showing uni- 



locular sporangia, a, a', and colored exserted filaments, b. 300 diam. 



PLATE VIII. 



J. H. Blake and W. G. Farlow. 



Fig. 1. Fucus vesiculosus, L. ; fructifying tip of frond : a, air-bladder; b, conceptacles. 

 Natural size. 

 2. Laminaria longicruris, De la Pyl. ; section through fructiferous portion of frond 

 showing unilocular sporangia, a, and paraphyses, b. 400 diam. 



PLATE IX. 



J. H. Blake and W. G. Farlow. 



Fig. 1. Fucus vesiculosus, L. ; section through a female conceptacle showing oospores 

 and paraphyses. 200 diam. 

 2. The same ; section through male conceptacle showing antheridia. 200 diam. 



