Oscillatoria] xxi. LYNGBYEiE (West). 379 



The specimens of this species are very fine ; it is a totally distinct 

 plant from Phormidium angustlsslmum, though it is of the same thick- 

 ness. It possesses no sheath, and the trichomes are much firmer and 

 not so tortuose as those of the latter ; its cells also are shorter and 

 more indistinct. 



XXII. CHAMiESIPHONE^. 

 1. SPH^ROGONIUM Kostaf. (1883). 



1. S. incrustans Rostaf. in Rosprawy Sprawozd. Posiedz. Akad. 

 Umiej. X. 282, 304-5, t. v. f. 1-7 (1883) ; W. et G. S. West in 

 Journ. Bot. 1897, p. 301. 



Chamctisiflion incrustans Grim, in Rabenh. Flor. Europ. Alg. 

 ii. 149. 



PuNGO Andongo. — Epiphyticum supra Zygnema ericetovum ad 

 Podostemaceas (Tristicha trifaria Tul.) in riv. de Cabondo ; Feb, 1857. 

 No. 108. 



XXIII. CYSTOGONEJ^:. 

 1. DERMOCARPA Crouan (1858). 

 1. D. depressa W. et G. S. West in Journ. Bot. 1897, p. 301. 

 LoANDA. — Epiphytica supra PHhoj^horam radlantcm in aquariis aquae 

 subdulcis insulse Cassanga pr. Morro da Cruz ; April 1854. No. 197- 



XXIY. CHROOCOCCAGE^. 



1. GLffiOTHECE Nag. (1849). 



1. G. confluens Nag. Gatt. einz. Alg. 58, t. i. o, f. 1 (1849) ; 

 W. et G. S. West, I.e. 



GoLUNGO Alto. — Cum Chroococco sckizodermatico var. hadio-pvi-- 

 jmreo, ad rupes juxta riv. Coango ; June 1856. No. 139. 



2. MERISMOPEDIA Meyen (1839). 



1. M. glauca Nag., I.e., 55, t. i. d, f. 1 (1849) ; W. et G. S. 

 West, I.e. 



Gonium glaucimi Ehrenb. 



HuiLLA. — Inter Utriculariam, Morro de LopoUo ; April 1860. 

 No. 179. 



2. M. hyalina Kiitz. Phyc. Germ. 142 (1845) ; Tab. Phyc. v. 12, 

 t. 38, f. i. (1855) ; W. et G. S. West, I.e. 



HufLLA. — In paludibus exsiccandis ; April 1860. No, 176. 



3. TETRAPEDIA Reinsch (1867). 



1. T. aversa W. et G. S. West in Journ. Bot. 1897, p. 301. 

 PuNGO AxuoxGO. — In stagnis prope Anbilla (Condo) ; March 1857. 

 No. 177. 



4. GLffiOCAPSA Kiitz. (1843) ; em. Niig. (1849). 



1. G. gelatinosa Kiitz. Phyc. Gener. 174 (1843) ; Tab. Phyc. i. 

 (1845-9), 15-16, t. 20, f. vi. b ; Rabenh. Flor. Europ. Alg. ii. 39, 

 W, et G, S. West, I.e. 



