Gomphonema] diatomacejt: (Comber). 387 



GoLUXGO Ai/ro. — In company with the variety figured in V 

 Heurok's Synops. t. xxv. f. 7 ; Rio Mftio ; 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 JVavi- 

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

 might be named G. Welwitschii Comber. 



LiBONUO.— Very plentiful, in company with Wolffia, in an unfinished 

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



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

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

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



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

 f. 48 (1833). 



GoLUXGO Alto.— On small shells in ponds near Sanee : Dec. 1864. 

 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 Pistia Stratiotea in the Cuige river 



near Quibinda ; March 1857. No. 130. 



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

 No. 146. 



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



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

 G. gracile var. naviculacea 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 Pistia Stratiotes in the Cuige river 



near Quibinda ; March 1857. No. 130. 



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

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



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

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

 Pungo Andongo. — On roots of Pistia 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). 

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



near Quibinda ; March 1857. No. 130. 



