VEG A-EXPEDITIOSENS V ET EN S K A I' L IG A ARDETE.S. 



503 



Cyclotella striata Ktitz var. sttjlorum Btw. (Van Heurck Syn. 

 PI. XCII, fig. 2—5). 



Coscinodiscus (Hanckii Grun. var.?) mesoleiusQX. — Very thin 

 and transparent. Strice 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. PI. 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. PI. LVIII, fig. 46, 47, 48). 



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



C. lineatns Ehh. (A. Schm. Atl. PL LIX, fig. 29—30). 



C. radiatiis Ehb. (A. Schm. Atl. PI. LX). 



Biddidphia reticidata Roper var. A. Schm. Atl. PI. LXXVIII, 

 fig. 21. 



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

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



B. Fioperiana Grev. (Van Heurck. Syn. PI. XCIX, fig. 6). 



Triceratium xoimctatnm Btw. (Pritch. Inf. PI. VI, fig. 20). 



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

 phitetras). 



T. Favus Ehb. a small form. 



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

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

 lunaris Ehb.?) 



Aiiaidiis mimdiis Grun. (Van Heurck PL CIII, fig. 4 — 5). 



Cerataidus Jahuensis CI. N. Sp. — Hyaline; valve broadly 

 ovale with rounded ends. Surface covered with extremelv fine 

 stride, 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 oc shaped. Length 

 of the valve 0,025-0,04 mm. — PL 38, fig. 80. 



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

 the connecting membrane forms a somewhat twisted tubus. 



Aidiscus ccelatus Bail (A. S. Atl. PL XXXII, fig. 13). 



A. Stdcl'hardtii Jan. (Guan. PL I, fig. 4). 



Anlacodisciis margaritacens Ralfs (A. Schm. Atl. PL XXXVII, 

 fig. 7). 



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



A. sx)Jendens Shadb. (Halionvx undenarius Jan. Guan. PL 



I, fig. 1). 



