Marine Diatoms 23 P 
Navicula Schultzii Kain. 
Sch. Atlas, Pl. 244, fig. 5. 
The type was found fossil in an artesian well boring at Atlantic City, New 
Jersey. I found specimens at the Philippine Islands. The form here discovered 
Heiden has designated as var. mexicana in the above reference. Found at Station 
20b-c. 
Navicula scintillans A. Sch. 
Sch. Atlas, Pl. 70, fig. 61. 
The general appearance of this diatom suggests the genus Mastogloia. 
Found at Station 23. It is rather close to varieties of N. glacialis Cl. 
Navicula sibirica Grun. 
Pl. I, fig. 10. Cl. Nav. Diat., II, p. 29; Cl. Vega Diat., Pl. 37, fig. 38. 
In the figure here given, a variety of this species, the apparent border is 
due to the vertical curve of the sides. Found at Station 23. 
Navicula Smithii Breb. 
Sch. Atlas, Pl. 7, figs. 16, 19; Grun. Diat. F. Jos. Land, Pl. 1, fig. 40. 
Several forms of this prolific and variable diatom were found; the type 
form at Stations 23 and 4l1c, varieties at 20b-c, 43b and 48c, and what Grunow 
calls var. borealis in the second reference above at Station 23. 
Navicula splendida Greg. 
Sch. Atlas, Pl. 13, fig. 31; Pl. 69, fig. 22. 
This species is quite abundant; Stations 23, 48a, 43g, and very large and 
brilliantly marked specimens at Station 43c. 
Navicula subcincta A. Sch., teste Grunow; see N. controversa Mann, nom. 
nov. 
Navicula suborbicularis Greg. 
Sch. Atlas, Pl. 8, figs. 1-6. 
Found at Station 430. 
Navicula subsalina Donk. 
Donk. Brit. Diat., Pl. 4, fig. 2; Van Heurck Syn., Pl. 11, fig. 6. 
Found at Station 41. Hardly to be kept separate from N. amphisbaena 
Bory. : 
Navicula superba Cl. 
Cl. Vega Diat., Pl. 36, figs. 23-24. 
Found at Stations 23, 41 and 41c, and the var. elliptica (fig. 24 above) 
in a plankton haul at Station 40d; my specimen of the last had length 0-058 mm. 
See Cl. Nav. Diat., II, p. 29. 
Navicula transitans Cl., var. incudiformis Cl. 
Cl. Vega Diat., p. 467, Pl. 36, fig. 26. 
Found at Stations 20b-c, 23 and 438b. 
Navicula trigonocephala Cl. (name pre-empted). 
Cl. Vega Diat., Pl. 36, fig. 27; Sch. Atlas, Pl. 259, figs. 17-18. 
The name is pre- -empted by (Ehr. ) Ralfs in Prit. Infus. ., p. 909. Found at 
Station 29g, plankton haul. 
Navicula valida Cl. and Grun. 
-Cl. and Grun., Arct. Diat., Pl. 2, fig. 29. 
Found at Station 43a. 
