394 DiATOMACE^ (Comber). [Eunotia 



3. E. pectinalis Rabenh. Fl. Eur. Alg. I. p. 73 (1864). 

 Confertia jjectinalis Dillw. Brit. Conferv, t. 24 (1809). 



PuNGO Andongo. — On roots of Pistia Stratiofes in the Cuige river 

 near Quibinda ; March 1857. No. 130. 



4. E. minor V. Heurck Syn. Atlas p. 36, t. xxxiii. f. 20, 21 

 (1880). 



Himantidlum minus Kuetz. Bacillar. p. 39. t. xvi. f. 10 (1844). 

 GoLUNGO Alto.— Eio Muio ; 5 Feb. 1855. No. 147- 



5. E. Eulensteinii Comber, sp. n. 

 Diatoma Eulensteinii Welw. in sched. 



It may possibly be identical with Desmogonium (juianense 

 Ehrenb. [in Schomb. Reisen in Brit. Guian. III. p. 539 (1848)], 

 but it has not the distinctive character upon which that genus 

 was founded. 



I find no Biatoma in the material ; and, as this species is the 

 most characteristic form present, I take it to be what is meant. 

 There are two forms : — 



f. hiconstricta, with a central inflation, 



/, constricta, without a central inflation. 



PuNGO Andoxgo. — On roots of Pistia Stratiotes in the Cuige river 

 near Quibinda ; March 1857. No. 130. 



23. TABELLARIA Ehrenb. in Berlin, Ber, K. Pr. Ak. 1840. 

 p. 217. 



1. T. flocculosa Kuetz. Bacillar. p, 127, t. xvii, f. 21 (1844). 

 Conferva Jiocculosa Both. Catalect. Botan. I. p. 192. t, iv, f, 4, 

 V. f. 6 (1797). 

 GoLUNCiO Alto.— Rio Muio ; 5 Feb. 1855. No. 147- 



24. CERATAULUS Ehrenb. in Berlin, Ber. K, Pr. Akad. 

 1843. p. 270; Ralfs in Pritch. Infus. p. 846 (1861). 



1. C. laevis Ralfs in op. cit, p. 847 (1861). 

 Biddulphia Icevis Ehrenb. Verbreit. in Berlin, Abhandh K. Pr. 

 Ak, 1843. p, 410 (122), 

 GoLUNGO Alto.— Rio Muio ; 5 Feb. 1855. No. 147- 



25. MELOSEIRA Ag, Syst, Alg, pp. xiv. 8 (1824); Kuetz. 

 Bacillar. p. 52 (1844) {Melosira). 



1. M. varians Ag, in Flora x. p. 628 (1827); Consp, Crit. 

 Diat. p. 64 (1832). 



PuNGO Andongo. — On roots of Pistia Stratiotes in the Cuige river 

 near Quibinda ; March 1857. No. 130. 



The following numbers represent material which is insufficient 

 for examination, or in which no Diatoms have been detected : — 



HuiLLA. — No notes. However, the presence of Eriocuulun. hiiillense 

 suggests that the gathering came from elevated swamps near Humpata. 

 etc., and should be compared with Alga No. 15. No. 16. 



LiBONGO. — In company with Woljfi" in a disused petroleum mine, 

 full of pure water, above Banza de Libongo ; Sept. 1858. No. 129- 



