Scylonemal xvu. scYTONEMACEyE (West). 371 



The following may be a larger form of this species : — 

 GoLUXGO Alto. — Filaments forming somewhut irregular peuicillate 



tufts of a brown colour. Crass, fil. 23-25 fj. ; crass, trich. 14-5-17 yi.. 



The specimens were not in a condition for satisfactory identification. 



Ad fontem prope Banza de Bango, socialis cum Anthocero, etc. ; 



Sept. 1865. No. 158. 



4. S. Millei Born, in Born, et Thiir. Notes Algolog. 147 (1880) ; 

 Born et Flah., I.e., 93 (1887); W. et G. S. West in Journ. Bot. 

 1897, p. 265. 



Hetei'ocysts sometimes subquadrate. 



PuNGO Andongo. — Ad rupes vulc. humectatas prope Cacella ips. 

 Prsesidii, inter Dichotricliem oJiriiceaui ; Feb. 1857. No. 7. 



5. S. ambiguum Kiitz. Spec. Algav. 894 (1849) ; Tab. Phyc. ii. 

 (1850-2), 7, t. 26, f. ii. ; Born, et Flah., I.e., 100 (1887) ; W. et 

 G. S. West in Journ. Bot. 1897, p. 265. 



Puxtio AxDOXGO. — Inter S. Mynchrous var. cliorographkum ; Feb. 

 1857. No. 6. 



The heterocysts are about three times longer than broad, and 

 sometimes as many as three together. 



6. S. figuratum Ag. Syst. Algar. 38 (1824) ; Born. etFlah., I.e., 

 101-3 (1887) ; W. et G. S. We.st, I.e. 



HriLLA. — In uliginosis editioribus prope Humpata, Empalanca et 

 Lopollo ; May 1860. No. 15. In graminosis paludibus juxta rivulum 

 de Lopollo ; April 1860. No. 180. 



7. S. Myochrous Ag. Dispos. Algar. Suec. 38 (1812) ; Born, et 

 Flah., I.e., 104-6 (1887). 



Conferva Myoehrous Dilhv. Brit. Oonferv. 37, t. 19 (1802). 



Var. chorographicum W. et G. S. West in Journ. Bot. 1897, 

 p. 265. 



PuNGO Andoxgo. — Freq. et temp. pluv. (Dec. usque Apr.) Isete 

 vegetans, in summis rupibus Prtesidii ; Feb. 1857. No. 6- Alga 

 erecta vel decumbens, csespitose crescens, filamentis oculo nudo nigris, 

 penicillatim e centro adh. radiantibus, mox latas rupium gigant. 

 plagas, imprimis verticales, colore atro tingens, qua ex causa = Pedrax 

 neijras de Pungo Andongo. 



Etiam ad latera boreal, et occid. de Pedra Songue ; April 1857. No. 

 12. Alga terrestris vel potius rupestris, eximie gregaria, incrementi 

 rapidissimi, juventute et tempore per dies nebuloso atrovirens, solis 

 luce et nidore cito nigrescens, latissimas rupium plagas perpendiculares 

 colore aterrimo tingens. 



This agrees in every particular with «S. Myochrous, with the exception 

 that the filaments are never ocreate. From S. figuratum it differs in 

 being of larger dimensions, and in having a relatively thicker sheath. 



8. S. insigne W. et G. S. West in Journ. Bot. 1897, p. 266. 

 Goi.uxGO Alto. — Ad rupes madidas in umbrosis juxta rivum 



Coango inter Sange et Undelle, nunc violaceo-viridis, nunc intensius 

 violacea ; May 1856. No. 5. Etiam ad rupes rivul. Coango humect, 

 pulvinula livido-cinerea spongiosa formans ; June 1856. No. 140. 

 This plant is noticeable for the variability of its filaments, some 



