EXPLANATION OF PLATES. 
Praté LXXXIV: 1. Cladophora crystallinaXt1/1. 2. Udotea cyathiformisX1 1/10. 3. Udotea cyathi- 
formisX4/5 circ. 4. Bryopsis plumosaX 60/67. 
Pirate LXXXV: 1. Codium tomentosumX1/6. 2. Codium decorticatum 8/27 circ. 
Pirate LXXXVI: 1. Petalonia fasciaX37/socirc.. 2. Rosenvingea orientalis 3/8 cire. 
PLaTE LXXXVII: 1. Castagnea zostereX71/100. 2. Stilophora rhizodesX 13/35 circ. 
Piate LXXXVIII: 1 and 2. Leathesia difformisX1/1 circ. 3. Sporochnus pedunculatusX t/t. 
Pirate LXXXIX: Fucus vesiculosus X 2/5. 
PLATE XC: 1. Sargassum natansX1/4 cire. 2. Sargassum filipendulaX 1/3 circ. 
Piate XCI: 1. Zonaria flava, bearing Spermothamnion investiens 2/3 circ. 2. Zonaria variegataX 
5/8 circ. 
PLATE XCII: 1. Padina vickersie (type) X1/4 circ. 2. Padina vickersieXt/2. 
Puate XCIII: 1. Spatoglossum schrederiX1/3 circ. 2. Dictyopteris polypodiodesX 1/3 circ. 3.Dictyop- 
teris serrata Xa/5 circ. 
Piate XCIV: 1x. Dictyota dichotoma, usual form from Fort Macon jetty, a, male; 6, femaleX2/5. 2. a 
and 6, Spatoglossum schrederiX38/87; c and d, Dictyota dichotoma, narrow form from coral 
reefX38/87. 3. Dictyota dichotoma, male, bearing proliferations from apices 1/3. 
Piate XCV: 1. Gelidium coerulescensX3/5 circ. 2. Gelidium crinaleXx 3/5. 3. Gymnogongrus griffith- 
si@X1/2 cire. 
Piate XCVI: 1. Agardhiella tenera, usual form X15/29. 2. Agardhiella tenera, slender form from coral 
reef X1/3 circ. 
Piate XCVII: 1. Meristotheca duchassaingii; a, cystocarpic; b, tetrasporic, bearing Streblonema invis- 
ibileX11/28 cire. 2. Meristotheca duchassingit X 11/36 circ. 
Prats XCVIII: 1. Rhabdonia ramosissimaXg/16 circ. 2. Eucheuma gelidiumX2/7 circ. 
Prats XCIX: 1. Gracilaria confervoides, cystocarpicX2/5 circ. 2. Gracilaria multipartita, from harbor; 
aand 3, sterile; c, cystocarpic X 16/35 circ. 
Puate C: 1. Hypnea musciformis, type 1, tetrasporicX2/5 circ. 2. Hypnea musciformis, type 2, cysto- 
carpic X 2/5 circ. 
Prats Cl: 1. Hypnea musciformis, type 3, cystocarpicX 9/26. 2. Hypnea musciformis, winter condition 
4/5. 3. Rhodymenia palmettaX25/39. 4. Rhodymenia palmettaX 9/28 circ. 
Puate CII: 1. Agardhinula brownee, cystocarpicX7/12. 2. Chrysymenia agardhii x 1/2. 
Piare CIII: 1. Chrysymenia enteromorpha, from Bogue Beach X1/2 cire. 2. Chrysymenia enteromorpha 
from coral reef X2/5 circ. 
Piate CIV: 1. Chrysymenia uvariaX7/12 circ. 2. Lomentaria uncinataX3/4. 3. Lomentaria roseaX1/3 
circ. 4. Champia parvulaX6/7. 
Puate CV: Nitophyllum medium; x. Sterile, densely branched X3/7 circ. 2. Type, veins evident, 
tetrasporangial sori in rather irregular lines<1/3 circ. 3. Veins conspicuous, tetrasporangial sori 
in unusually regular lines or very irregular 3/7 circ. 
PLate CVI: 1. Grinnellia americana, tetrasporicX3/7 circ. 2. Laurencia tuberculosa var. gemmiferaX 3/5 
circ. 
Piate CVII: 1. Chondria littoralis1/3 circ. 2. Chondria dasyphylla, winter conditionX1/1t. 3. Chon- 
dria tenuissima var. baileyanaX5/8. 4. Chondria dasyphyllaX 3/8 circ. 
Puate CVIII: 1. Chondria sedifolia, cystocarpicX3/5 circ. 2. Chondria sedifolia, tetrasporic X 9/20 circ. 
3. PolysiphoniahavanensisX7/15. 4. aand b, Polysiphoniadenudata; c, Polysiphonia harveyi X 10/11. 
Pirate CIX: 3. Polysiphonia denudataX4/11 circ. 2. Polysiphonia denudataX14/17. 3. Polysiphonia 
nigrescens X15/16. 4. Brongniartella mucronata X 19/30. 
Puare CX: 1. Herposiphonia tenella on Gracilaria multipartitaX1/2. 2. Dasya pedicellataX29/56. 
Piate CXI: 1. Spyridia filamentosaXt10/21. 2. Ceramium rubrumXt/2 circ. 3. Ceramium strictumX 
7/T5. 
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