460 CLEVE, DIA TOMS. 
var. stauroneiformis, Spitsb., Finm., Mushr. P., Cape Desch- 
new (East Cape). 
forma parva, — Cape Deschnew (East Cape). 
f. minutissima Grun. — F. J. L. 
C. distans Greg. (D. of Cl. Pl. IX, fig. 23, A. Schm. N. Sea 
Diat. III, fig. 22—23) Mushroom Point, Kara. 
C. pseudomarginata Greg. (D. of C1. P1. IX, fig. 27, C. pellu- 
cida Grun. Verh 1863 Clev. D. of the A. S. pag. 14) Greenl., 
Spitsb., Finm., Kara. 
C. dirupta Greg. (Van Heurck Syn. P1. XXIX, fig. 13—14) 
Greenl. 
C. decipiens Ol. (D. of the A. S. pag. 14, Pl. I, fig. 6, lower 
valve, P1. II, fig. 11 a, upper valve) strie on the upper valve 
19 in 0,01 mm. — Greenl., Bessel's Bay, Finm. 
C. arctica C1. (D. of the A. S. pag. 14, Pl. II, fig. 11 b., upper 
valve). Length 0,03 mm. Br. 0,018 mm. Lower valve with sig- 
moid median line and coarse strix, composed of distinct puncta, 
12 in 0,01 mm. Central nodule, surrounded by a small area. 
Upper valve without distinet median line and central nodule. 
Strie interrupted, marginal and axial 11 in 0,01 mm. 
Pl. 35, fig. 4 a, lower, b, upper valve. ; 
Greenl., Bessel's Bay, Finm. 
C.- costata Greg. (Van Heurck Syn. Pl: XXX, fig. 11—12)y 
Greenl., Mushroom Point, Spitsb., Finm. 
C. fimnarchica Grun. (Arcet. Diat. p. 16 Pl. I, fig. 1) Bes- 
sel's Bay, Finm. 
C. quarnerensis (Grun.) A. Schm. (N. Sea Diat. P1. III, fig. 
15—16) Greenl., Spitsb., Finm. 
2. Mastogloiacez. 
Mastogloia ovata Grun. (A. Diat. P1. I, fig. 2) Finm., Kara. 
M. kariana Grun. (A. Diat. pag. 17, Pl. I, fig. 3) Kara. 
3. Achnanthez. 
Achnanthes subsessilis Kätz. (Achnanthidium areticum Cl. 
D. of the A. S. p. 25, Pl. IV, fig. 22, A. brevipes Ag.) Greenl., 
Mushroom Point, Spitsb., Finm. 
ÅA. coarctata (Bréb) Grun. Mushroom Point. 
A. grönlandiea (C1.) Grun. (Achnanthid. CI. D. of the Arct. 
Sea, pag. 25, Pl. IV, fig. 23) Greenl., Bessel's Bay (common), 
Spitsb., Finmark. 
