VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 503 
Cyclotella striata Kätz var. stylorum Btw. (Van Heurck Syn. 
P1. XOII, fig. 2—5). 
Coscinodiscus (Hauckii Grun. var. ?) mesoleius Cl. — Very thin 
and transparent. Strige marginal, composed of fine puncta, 
28 in 0,01 mm., surrounding a large structure-less centre. Diam. 
0,03 mm. — PI. 38, fig. 82. 
This form differs from Cos. Hauckii Grun. (Van Heurck 
Syn. P1. XCIV, fig. 29) by its structure-less central area, which 
in the Grunowian species is covered with large scattered puncta. 
C. excentricus Ehb. (A. Schm. Atl. Pl. LVTIII, fig. 46, 47, 48). 
C. mitidulus Grun. (A. Schm. 1. c. fig. 20). 
J. lineatus Ehb. (A. Schm. Atl. Pl. LIX, fig. 29—30). 
C. radiatus Ehb. (A. Schm. Atl. Pl. LX). 
Biddulphia reticulata RBoper var. A. Schm. Atl. P1. LXX VIII, 
fig: 21 : 
var.? dubia (Btw.) — Triceratium dub. Btw. M. J. VII, pag. 
180 PINRSNfS IT Picorne Ok 
B. Roperiana Grev. (Van Heurck. Syn. Pl. XCIX, fig. 6). 
Triceratium punctatum Btw. (Pritch. Inf. Pl. VI, fig. 20). 
T. parvulum Jan. & Rab. (Hond: pag. 4, Pl. I, fig. 4, Am- 
phitetras). 
T. Favus Ehb. a small form. 
Euwnotogramma tlevis Grun. (Cl. & Möll. Diat. No 257 —? 
Leudug. Fortm. Diat. Ceyl. "Pl. IX, fig. 93, 94, 95, Biddulphia 
lunaris Ehb.?) 
Anaulus minutus Grun. (Van Heurck P1. CIII, fig. 4—5). 
Cerataulus labuensis Cl. N. Sp. — Hyaline; valve broadly 
ovale with rounded ends. Surface covered with extremely fine 
strige, 28 in 0,01 mm., almost parallel, near the ends radiating, 
passing from the longitudinal axis of the valve to the margin. 
Both valves of the frustle at an angle to each other. F. W. 
trapeziform or irregularly quadratic; in the corners of the val- 
ves are ocelli visible. Connecting membrane o shaped. Length 
of the valve 0,025—0,04 mm. — PI. 38, fig. 80. 
Both valves are not opposite to each other, for which reason 
the connecting membrane forms a somewhat twisted tubus. 
Auliscus celatus Bal (A. 5. Atl. P1. XXXII, fig. 13). 
ÅA. Stöckhardtii Jan. (Guan. PI. I, fig. 4). 
Aulacodiscus margaritaceus BRalfs (A. Schm. Atl. P1. XXXVII, 
för 
Actinoptychus hexagonus Grun. (A. Schm. Ail. PI. IT, fig. 15). 
ÅA. splendens Shadb. (Halionyx undenarius Jan. Guan. Pl. 
I DE 
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