A L G M. 163 



appendiculato, disco utrinque spinulis simplicibus rcumosisve dense con- 

 sperso ; coccidiis pedicdlatis in spinulis marginalibm et e disco ortis 

 immersis. 



Hab. Puget Sound, opposite Fort Nisqually. 



Frond 2 or 3 feet long, 6 to 10 inches wide, rising with a short 

 stem; which soon dilates into a single lanceolate lamina, jagged, and 

 irregularly dentate at the margin, and roughened all over both sur- 

 faces with short spinules, which are either simple or forked. Sub- 

 stance thin (much thinner than that of Q. Eadula), but leathery when 

 dry. Color a fine purple. Fruit pedicellate, borne toward the base 

 of the frond, in the marginal or discal spines. 



Gigartina mollis, Harv. & Bail. (Tab. 6, f. 3, 4.) 



G. fronde cartilaginea plano-compressa lineari disticJia pinnatim ramosa 

 purpurea, rarnis ramidisque alternis vel oppositis erectis basi angulatis 

 attenuatis integris vel denticulatis apice pinnatis, 7*amulis ultimis an- 

 gustis subfiliform ibus. 



Hab. Puget Sound. 



-*o 



Frond 3 or 4 inches high, a line or a line and a half wide, distich- 

 ously branched, from once to thrice pinnated ; the pinnse (and pin- 

 nules) all very erect, naked below, closely set with pinnules above, 

 narrowed toward the base and apex, sometimes forked, and then each 

 division pinnulated. Color purple. Substance cartilaginous, soon 

 decomposing, if moistened after having been once dried, and then 

 closely adherent to paper. 



Irid^ea Mertensiana, Post. & Ruppyr. Fl. t. 23. 



Ptilota asplenioides, J. Ag. Sp. 2, p. 98 ; Post. & Rappr. I. c. t. 29. 



Ptilota plumosa, J. Ag. I. c. Harv. Plxyc. Brit. £. 80. 



Ceramium rubrum, Ag. ; Harv. Ner. Bor. Am. I. c. 



Porphyra vulgaris, var. Harv. Ner. Bor. Am I. c. 



Ulva latissima, Linn. ; Harv. I. c. 



Enteromorpha compressa, Grev. ; Kiitz. I. c. p. 4 SO. 



