14 P. T. CLEVE, ON SOME NEW DIATOMS 
Length 0,093 mm. Breadth 0,024 mm. 
PLL, fe. oe 
Gallapagos Islands rare (Eugenie Exp.). 
Gruxow has found in the Campeche Bay gathering a closely allied form, Am- 
phiprora Campechiana Grun. (Arct. Diat. pag. 66), which has 127/, strie in 0,01 mm. 
and another species swith 15 strie in 0,01 mm. and obtuse ends. 
22. Navicula Pensacole Cu. N. Sp. 
Lanceolate, with undulate margins and prominent apices. Strie indistinct, pun- 
ctate, 15 in 0,01 mm., parallel. The portion of the valve between the keels is very 
indistinctly striate. 
Length 0,054 mm. Breadth 0,015 mm. 
Pl. IE, fig. 83, 2)... 
Florida near the Harbour of Pensacola in a gathering sent by Mr. Frsicsr. 
The following species is perhaps related to the species of this section: 
23. Navicula Gallapagensis Cu. N. Sp. 
Panduriform, with cuneate ends. Striz transverse, parallel, 15 in 0,01 mm., in- 
distinctly punctate, reaching the median line and interrupted by a line or keel. The 
median part of the valve around the median line is striate. 
Length 0,067—0,092 mm. Breadth 0,025 mm. 
Pl, Ul, fiz. 40, *"/, @ SV. 6. F. YV. 
Gallapagos Islands rare (Eugenie Exp.). 
Stauroneis Exs. 
1. Stauroneis Balearica Cu. N. Sp. 
Elongated, with acute ends. Stauros very short. Strie transverse, 26 in 0,01 
mm., and longitudinal 23 in 0,01 mm., crossing each other in right angles. 
Length 0,11 mm. Breadth 0,013 mm. 
Pi, Ill, fig. 41, 2. */,, b. structure 7°"; 
Balearic Islets rare (F. SODERLUND). 
This species is nearly akin to St. Quarnerensis (GruN. in litt.) from the Adriatic 
Sea, which has also a short stauros and 18 longitudinal stria in 0,01 mm. 
2. Stauroneis sulcata Cu. N. Sp. 
Linear, with cuneate ends, stauros reaching the margin. Structure: strong, lon- 
gitudinal lines or furrows, parallel with the median line, and transverse parallel strie, 
21 in 0,01 mm. 
