VEGA-EXPBDITIONENS V ET EN S K A PL IG A ARBETE.\. 



503 



Gyclotella striata Kutz var. stylorum Btw. (Van Heurck Syn. 

 PL XCII, fig. 2—5). 



Coscinodiscus (Eauchii Grun. var.?) mesoleius CI. — Very thin 

 and transparent. Striae 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. PL 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 LVIII, fig. 46, 47, 48). 



C. nitiduhis Grun. (A. Schm. 1. c. fig. 20). 



C. Imeatus Ehb. (A. Schm. Atl. PL LIX, fig. 29—30). 



C. radiatus Ehb. (A. Schm. Atl. PL LX). 



Biddulphia reticidata Roper var. A. Schm. Atl. PL LXXVIII, 

 iig. 21. 



var. ? dubia (Btw.) — Triceratium dub. Btw. M. J. VII, pag. 

 180, PL IX, fig. 12 T. bicorne CI. 



B. Roperiana Grev. (Van Heurck. Syn. PL XCIX, fig. 6). 



Triceratium punctatum Btw. (Pritch. Inf. PL VI, fig. 20). 



T. parvnluni Jan. & Rab. (Hond. pag. 4, PL I, fig. 4, Am- 

 phitetras). 



T. Faviis Ehb. a small form. 



Eunotogramma Icevis Grun. (CI. & Moll. Diat. No 257 — ? 

 Leudug. Fortm. Diat. Ceyl. PL IX, fig. 93, 94, 95, Biddulphia 

 lunaris Ehb.?) 



Anaulus minutus Grun. (Van Heurck PL GUI, fig. 4 — 5). 

 Cerataulus lahuensis CI. N. Sp. — Hyaline; valve broadly 

 ovale with rounded ends. Surface covered with extremely, fine 

 striae, 28 in 0,oi 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 co shaped. Length 

 •of the valve 0,o25— 0,o4 mm. — PL 38, fig. 80. 



Both valves are not opposite to each other, for which reason 

 the connecting membrane forms a somewhat twisted tubus. 



Aulisms cwlatus Bail (A. S. Atl. PL XXXII, fig. 13). 



A. StocMiardfii Jan. (Guan. PL I, fig. 4). 



Aulacodiscus margaritaceus Ralfs (A. Schm. Atl. PL XXXVII, 

 Hg. 7). 



Adinoptychus hexagonus Grun. (A. Schm. Atl. PL I, fig. 15). 



A. splendens Shadb. (Halionyx undenarius Jan. Guan. PL 

 I, fig. 1). 



