46 VALONIACE^. 



they are many times as long as broad ; but now and then a short, globose articulus is 

 interposed between the two long ones. Colour, a pale green. 



Plate XLIII. B. Figs. 1, 2, 3. Penicillus capitatus, different varieties ; the 

 natural size. Fig. 4. Portion of a dichotomous filament from the capitulum. Fig. 5. 

 Small portion of the same, after the lime has been removed ; the latter figures more or 

 less highly magnified. 



Sect. 2. Halipsygma, Endl. (Rhipocephalus, Kiitz.) ; branches of the capitulum 

 cohering in flabelliform laminae. 



3. Peniciixus Phoenix, Lamk. ; stipes elongate, terete, incrusted, smooth ; capitu- 

 lum ovoid or oblong, its filaments incrusted, very slender, dichotomous, cohering by 

 their edges into many distinct, flat, cuneate, level-topi)ed, spreading lamina3. Dne. 

 Cor. p. 98. Lamk. An. Mus. 20, jo. 299. Corallina Phoenix, Ell. and Sol. p. 126, 

 t. 25, fig. 2-3. Nescea Phoenix, Lamour, I. c. p. 256. Bhipocephalus Phoenix, Kiitz. 

 Sp. Alg. p. 506. (Tab. XLIII. C.) 



Hab. Key West, W. H. H. Dredged in 3^ fathoms off Soldier's Key, Prof. 

 Tuomey. (v. v.) 



Root somewhat fusiform, dense, descending. Stipes cylindrical, 1-3 inches long, a 

 quarter inch in diameter, thickly incrusted with calcareous matter, the surface smooth, 

 composed as in the rest of the genus of many slender longitudinal branching and 

 ramelliferous threads. The filaments of the capitulum are thickly incrusted with 

 calcareous matter, and disposed in many flat, cuneate, flabelliform laminae ; their 

 ramifications lying close together, and cohering laterally by means of the incrustation. 

 On removing the carbonate of lime the cohesion of the filaments is destroyed. The 

 articulations are many times longer than broad, cylindrical, and much constricted at 

 the nodes. 



Plate XLIII. C. Fig. 1. Penicillus Phoenix, the natural size. Fig. 2. Portion 

 of one of the fanlike laminae of the capitulum. Fig. 3. Cells from the same, after the 

 removal of the lime ; the latter figures more or less magnified. 



III. BLODGETTIA, Harv. (n. gm.) 



Frond csespitose, branching, confervoid, articulate. Articulations unicellular, filled 

 with grumous, viscid endochrome ; the cell-wall formed of separable membranes, 



