bo 
or 
oO 
ww 
bo 
Levistriate Cl. Syn. Il, p. 66. 
20. N. Yarrensis Grun. A.S. Atl. tab. XLVI, fig. 2. tab. nostr. fig. 6. 
Lem Dan (5 samples). 
Only in one of the samples a single specimen of this species agreeing 
with the figure by A.S. (1.c.) has been met with. Smaller forms agreeing 
tolerably well with those from V. Heurck’s types No. 542 (from Yarra-Yarra, 
fossil) only with their apices a little more attenuated and thus reminding 
of the variety ,simbirskiana* (Pant. II, tab. XII, fig 16) are much more 
common in the collection. 
Area: Europe (Kiel), Hungary (fossil). America, Africa, Asia, Australia. 
21. N. bicontracta Ost. sp. nov. tab. nostr. fig. 7. 
L. 0,028 mm., B. in the middle 0,0085 mm., at the constriction 
0,0055 mm. Strie 12—13 in 0,01 mm. 
Valve biconstricted, with greatest breadth in the middle and 
with cuneate apices. Strie radiate in the middle with a single 
short stria inserted, towards the apices at right angle to and nearly 
reaching the apical axis. Central area narrow, apices slightly curved. 
The systematical place of this small species is doubtful. Perhaps it 
is related to a ,fragliche Form* from New Yersey in A.S. Atl. tab. CCXIL, 
fig. 2, which seems to approach to Caloneis Egena A.S. (CI. Syi. I, p. 66). 
As I think I have seen a slight trace of a transversal lineation of the 
strie, I dare not refer it to ,Pinnularia*. 
Lem Ngob. Only one specimen met with. 
Pinnularia Ehr. (1843), Cl. Syn. Il, p.71. 
Capitate Cl. 1. c¢. p.75. 
22. P. Braunii Grun. V.H. Syn. tab. VI, fig. 21. A.S. Atl tab. XLV, 
figs. 77 —78. 
Naval station, Lem Dan, Lem Ngob. (9 samples). 
Rather variable, especially in size. The greatest length observed by 
me is 0,086 mm. 
Area: Europe, America, Bengal, Australia. 
23. P. interrupta W.Sm. A.S. Atl. tab. XLV, fig. 70. 
Klong Munsé. 
Area: Europe, America, Asia, Australia. 
24, P. microstauron Ehr. V.H. Syn. tab. VI, fig. 9. A. S. Atl. 
tab. XLIV, fig. 35, 
Lem Dan, Lem Ngob. 
Area: Spitzbergen, Greenland, Kamtschatka, Kurope, N. America, Australia. 
