598 



Annals of the Smith African Museum. 



Var. paleacea, Grun. ; Van Heurck, op. cit., p. 183, PI. LXVIII, 



figs. 9, 10. 



Samples 14, 15. 



Fig. 41.— a. Nitzschia sigma, var. sigmatella, Grun. b. N. sigma, var. rt.?i- 

 chiia Grun forma (?'). c. Nitzschia lorenziana, Grun. J. tf. hunganca, 

 Grun. e. IV. tryllionella,v&r. levidensis, W. Sm. /. A', sijwa, var. aubcap*- 

 tata, Itabenh. a, x 750 ; b, and d-/, x 1350 ; c, x 600. 



2. Nitzschia amphibia, Grun.; Van Heurck, op. o7., p. 184, PL 

 LXVIII, figs. 15-17. 

 Sample 32. 



Long., 27-36 /x ; lat., 6/x. 

 Kecorded from Little Namaqualand by G. S. West, 



