394 diatomace*: (Comber). [Euvotia 
3. E. pectinalis Rabenh. Fl. Eur. Alg. I. p. 73 (1864). 
Conferva pectinalis Dillw. Brit. Conferv. t. 24 (1809). 
PuNGO Andongo. — On roots of Pistia StraUoies in the Cuige river 
near Quibinda : March 1857. No. 130. 
4. E. minor V. Henrck Syn. Atlas p. 36. t. xxxiii. f. 20, 21 
(1880). 
Himantidiwm minus Kuetz. Bacillar. p. 39. t. xvi. f. 10 (1844). 
GOMJNGO Alto.— Rio Muio ; 5 Feb. 1855. No. 147- 
5. E. Eulensteinii Comber, sp. n. 
Diatoma Eulensteinii Wehv. in sched. 
It may possibly be identical with Desmogonium guianense 
Ehrenb. [in Schomb. Pteisen in Brit. Guian. III. p. 539 (1848)], 
but it has not the distinctive character upon which that genus 
was founded. 
I find no Diatoma 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 : — 
/'. biconstricta, with a central inflation. 
/. constricta, without a central inflation. 
PUNGO ANDONGO.— On roots of Pistia Stratiotes in the Cuige river 
near Quibinda ; March 1857. Xo. 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 flocculosa Roth. Catalect. Botan. I. p. 192. t. iv. f. 4, 
v. f. 6 (1797). 
Golungo Alto.— Rio Muio ; 5 Feb. 1855. Xo. 147. 
24. CERATAULUS Ehrenb. in Berlin, Ber. K. Pr. Akad. 
1843. p. 270; Rails in Pritch. Infus. p. 846 (1861). 
1. C. lsevis Ralfs in op. tit., p. 847 (1861). 
BhldulpMa Icevis Ehrenb. Verbreit. in Berlin, Abhandl. 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. Xo. 130. 
The following numbers represent material which is insufficient 
for examination, or in which no Diatoms have been detected : — 
Huilla. — Xo notes. However, the presence of E/riocaulwi huillensi 
suggests that the gathering came from elevated swamps near Humpata. 
etc., and should be compared with Alga No. 15. Xo. 16. 
LlBONGO.— In company with Wolffia in a disused petroleum mine, 
full of pure water, above Banza de Libongo : Sept. 1858. No. 129- 
