200 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



PLATE V. 



J. H. Blake and TV. G. Farlow. 



Fig. 1. Leatlusia difformis, (L.) Arescli. ; dissection showing a portion of corticallayer: 

 a, a, unilocular sporangia ; h, h, hairs. 400 diam. 



2. Cliordaria JlagclUformls, 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. Asjyei'ococcns cchinatiis, Grev. ; transverse section of frond: a, unilocular sporan- 



gia ; J), hairs. 150 diam. 



4. Stilo2)1iora rhizodes, Ag. ; longitudinal section of outer part of frond showing 



sorus with paraphyses and unilocular sj)orangia. 400 diam. 

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



unilocular sporangia. 

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



diam. 



PLATE VL 

 J. H. Blal-e and W. G. Farlow. 



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

 h, and unilocular sporangia, a. 200 diam. 



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



magnified to show unilocular sporangia, a, a', and parax)hyses, h. GOO diam. 



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



200 diam. 



4. The same with unilocular sporangia. 



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



sporangia. 400 diam. 



PLATE VII. 

 J. R. Blalc and W. G. Farlow. 



Fig. 1. Castagnea vircscens, (Carm.) Thuret ; unilocular sporangium and hair, h. 400 

 diam. 



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



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



3. Elachistea fucicola, Fries; dissection of superficial part of frond, showing uni- 



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



PLATE VIII. 



J. H. Blalc and W. G. Farlow. 



Fig. 1. Fucus resicnlosus, 1j.; fructifying tip of frond: a, air-hladdcr; &, conceptacles. 

 Natural size. 

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

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



PLATE IX. 



J. U. Blalce and TV. 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. 



