Gomp/wnema] diatomace.t; (Comber). 387 



GoLUNGO Alto. — In company with the variety figured in V. 

 Heurck's Synops. t. xxv. f. 7 ; Rio Muio ; 5 Feb. 1855. No. 147. A 

 rather broad form ; on small shells in ponds near Sange ; Dec. 1854. 

 No. 146. 



Var. lata Comber, var. nov. 



Much broader and shorter than the typical form, and so nearly 

 symmetrical that it might at first sight be mistaken for a 2^avi- 

 cukt. Many may regard it as a distinct species ; in which case it 

 might be named G. Welwitschii Comber. 



LiP.(iX(;o. — Very plentiful, in company with Wo[p(i, in an unfinished 

 shaft of a coal mine above Banza de Libongo ; Sept. 1858. No. 137. 



3. G. intricatum Kuetz. Bacillar, p. 87. t. ix. f. 4 (1844). 

 Var. pumila Grun. in V. Heurck Syn. t. xxiv. f. 35, 36 (1880). 

 GoLUNtiO Alto.— Rio Muio ; 5 Feb. 1855. No. 147. 



4. G. dichotomum Kuetz. Syn. in Linnsea viii. p. 569. t. xv. 

 f. 48 (1833). 



GoLUNCio Alto. — On small shells in ponds near Sange ; Dec. 1854. 

 No. 146. 



5. G. Vibrio Ehrenb. Verbreit. in Berlin, Abhandl. K. Pr. Ak. 

 1843. p. 416 (128). t. II. i. f. 40. 



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

 near Quibinda ; March 1857. No. 130. 



6. G. gracile Ehrenb. Infusionsth. p. 217. t. xviii. f. 3 (1838). 

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



near Quibinda ; March 1857. No. 130. 



G0LU.\(i0 Alto. — On small shells in ponds near Sange ; Dec. 1854. 

 No. 146. 



Var. naviculoides Grun. in V. Heurck Syn. t. xxiv. f. 13 (1880). 



Gomphonema naviculoides W. Sm. Brit. Diat. II. p. 98 (1856). 

 G. gracile var. naviculacecc Cleve, loc. cit., I. p. 183 (1894). 



GoLUNGO Alto. — On small shells in ponds near Sange ; Dec. 1854. 

 No. 146. 



7. G. commutatum Grun. in V. Heurck Syn. t. xxiv. f. 2 (1880). 

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



near Quibinda ; March 1857. No. 130. 



8. G. oxycephalum Cleve, loc. cit., I. p. 187. t. v. f. 10 (1894). 

 GoLUNGO Alt(J.— Rio Muio ; 5 Feb. 1855. No. 147. 



9. G. olivaceum Kuetz. Bacillar. p. 85. t. vii. f. 13, 14 (1844). 

 Echinella olivacea Lyngb. Tent. Hydr. Dan. p. 209. t. 70. f. C, 1-3. 

 PuNGO Andongo. — On roots of Pit^tia Stratiotes in the Cuige river 



near Quibinda ; March 1857. No. 130. 



GoLUNGO Alto. — On small shells in ponds near Sange ; Dec. 1854. 

 No. 146. 



10. G. tenellum Kuetz. Bacillar. p. 84. t. viii. f. 8, b (1844). 

 G. olivaceum var. tenellum Cleve, loc. cit., I. p. 188 (1894). 

 PiJNGo Andongo. — On roots of Pixtia St7'atioteH in the Cuige river 



near Quibinda ; March 1857. No. 130. 



