SYNOPSIS OF THE SPECIES. XXXV 



tufts ; branches virgate, erect, subdistant, straight, alternate ; ramuli few, 

 scattered ; axils very acute ; lower articulations twice, upper six times as 

 long as broad. (Tab. VI.) 



306. uncialisj tufts short, spongy, divided; filaments flexuous, sparingly 

 branched, interwoven and rooting ; ramuli secund, distant ; articulations 

 twice as long as broad. (Tab. CCVII.) 



307. arcta; tufts very dense, starry, bright green; filaments matted at the base, 

 much branched ; branches straight, crowded, very erect ; ramuli appressed ; 

 articulations in the older parts once or twice as long as broad, in the 

 younger many times longer. (Tab. CXXXV.) 



308. glaucescensj tufts dense, glaucous green; filaments very slender, zigzag, 

 much branched ; branches erect, lesser ones pectinate, with very erect, close- 

 set, straight, elongated ramuli; articulations thrice as long as broad. 

 (Tab. CXCYI.) 



309. falcata; densely tufted, dark green; filaments rigid, curved, irregularly 

 divided ; branches zigzag, decompound, the lesser branches arched, or in- 

 curved and falcate, ramulose on their inner faces ; ramuli blunt; articulations 

 3-4 times as long as broad, with a dense endochrome and pellucid dissepi- 

 ments. (Tab. CCXVI.) 



310. Magdal^ise ; filaments capillary, blackish -green, short, decumbent, 

 matted together, slightly branched, angularly bent; branches divaricate, 

 dichotomous ; ramuli few, falcate ; articulations three to four times as long 

 as broad. (Tab. CCCLV. A.) 



311. Gattysej filaments short, dingy green, capillary, matted together, densely 

 tufted, dichotomous, flexuous, with few ramuli ; articulations once and half 

 as long as broad. (Tab. CCCLV. B.) 



312. fiavescensj forming pale yellowish strata; filaments slender, sparingly 

 divided, subdichotomous, flexuous ; ramuli long, alternate or secund ; ar- 

 ticulations 8-9 times as long as broad. (Tab. CCXCVIII.) 



313. fractaj tufts entangled, often floating, dull green; filaments rigid, dis- 

 tantly branched, subdichotomous, with wide axils ; ramuli few, alternate or 

 secund; articulations 3-6 times as long as broad, at length elliptical. 

 (Tab. CCXCIV.) 



XCII. RHIZOCLONIUM. 



314. ripariumj slender, pale green, flaccid, angularly bent ; articulations about 

 twice as long as broad. (Tab. CCXXXVIII.) 



315. Casparyi; filaments extremely slender, pale, interwoven, curved and bent; 

 angles emitting root-like branches ; articulations 2-6 times longer than 

 broad; endochrome granular. (Tab. CCCLIV. B.) 



XCIIT. CONFERVA. 

 * Decumbent, stratified. 



316. arenicolaj threads soft, extremely line, matted, very pale green; articula- 

 tions once and half as long as broad. (Tab. CCCLIV. J.) 



317. arenosaj filaments slender, straightish, rigid, forming wide strata; joints 



3-5 times as long as broad. (Tab. LIV. C.) 



318. litoreaj filaments thick, rigid, crisped, Loosely bundled, dull green; arti- 

 culations once and half as Long as broad, here and there swollen in pairs 

 and discoloured. (Ta b. CCCXXXIII.) 



