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200 THE MARINE ALGÆ OF NEW ENGLAND. PLATE V. J. H. Blake and W. G. Farlow. Fig. 1. Leathcsia difformis, (L.) Aresch.; dissection showing a portion of cortical layer: a, a, unilocular sporangia; b, b, hairs. 400 diain. 2. Chordaria flagelliformis, Ag.; longitudinal section of outer part of frond showing cortical filaments with unilocular sporangia, a, and a few cells of internal layer. 500 diam. 3. Asperococcus echinatus, Grev.; transverse section of frond: a, unilocular sporangia; 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. [sic] Ralfsia 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 filum, L.; transverse section of portion of a frond showing paraphyses, b, and unilocular sporangia, a. 200 diam. 2. Stilophora rhizodes, Ag.; portion of sorus taken from Pl. 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. Myrionenia Leclancheri, (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 Zosteræ, (Mohr.) Thuret; transverse section of outer portion of frond showing plurilocular sporangia, a, a', and hair, b. 400 diam. 3. Elachistea fucicola, Fries; dissection of superficial part of frond, showing unilocular 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.
REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 201 PLATE X. J. H. Blake and W. G. Farlow. Fig. 1. Spyridia filamentosa, Harv.; axis with branch bearing antheridia, a, 200 diam.; 2. Callithamnion corymbosum, Lyngb.; branch with antheridia. 200 diam. 3. Trentepohlia virgatula, Harv.; showing the undivided spores, a, a. 200 diam. 4. Griffithsia Bornetiana, Farlow; tip of male plant with antheridia. 400 diam. 5. The same; portion of tetrasporic plant with tetraspores, a, and involucre, b. 200 diam. PLATE XI J. H. Blake and W. G. Farlow. Fig. 1. Callithamnion Baileyii, Harv.; plant with tetraspores: a, before separation from the mother-cell; a', free from the mother-cell. 200 diam. 2. The same; plant bearing binate cystocarp. 3. Griffithsia Bornetiana, Farlow; plant bearing cystocarp (favella). 200 diam. PLATE XII. J. H. Blake and W. G. Farlow. Fig. 1. Nemalion multifidum, Ag.; dissection of outer part of the plant to show the cystocarp. 400 diam. 2. Spyridia filamentosa, Harv.; tip of female plant with a double cystocarp, the right-hand portion of figure representing the cystocarp and branch in section; the left-hand cystocarp being seen superficially. 400 diam. PLATE XIII. J. H. Blake and W. G. Farlow. Fig. 1. Polysiphonia Olneyi, Harv.; branch with antheridium, a. 200 diam. 2, 3, and 4. Grinnellia Americana, Harv.: Figs. 3 and 4 represent the antheridia seen from above and in section, a; Fig. 2, section through a cystocarp. 400 diam. PLATE XIV. J. H. Blake and W. G. Farlow. Fig. 1. Petrocelis cruenta J. Ag.; dissection of frond showing the tetraspores, a, a'. 400 diam. 2. Rhabdonia tenera, J. Ag.; transverse section of frond showing cystocarp and carpostome. 200 diam. PLATE XV. J. H. Blake and W. G. Farlow. Fig. 1. Dasya elegans, Ag.; branch with stichidium bearing tetraspores. 300 diam. 2 and 5. Champia parvula, Harv.: Fig. 5, portion of frond bearing a cystocarp, a; slightly enlarged; Fig. 2, section through a, showing arrangement of spores, carpogenic cell, and carpostome. 400 diam. 3 and 4. Polysiphonia Harveyi, Bail.: Fig. 4, branch with cystocarp; Fig. 3, section through the same, showing spores and carpogenic cell. 400 diam.
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I.-THE MARINE ALGÆ OF NEW ENGLAND.
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REPORT OF THE COMMISSIONER OF FISH
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