Fig. 12. Xitischia hijhrlda Grux. b— e from Brettcsnes, ^4 1899. The sti-iæ of the eoiinecting zone are in reality much tiner tlian 

 in the figures. 



a. The Skjerstad Fiord XII (outer part), -'4 1900, 0—50 m.; "■"1. 44 |i. h)ng, s m. broad; about 9 l^eel puneta on 10 ;>.. 

 Transverse striæ (of the valve) were not visible. 



b. N. (hyJyrida var.?) jÆiicida Grun.? One valve, in side view, "'-"/i. 38 ]). long, about 10 — 11 keel puneta on 10 n. 



e, d. Cells in side view, c "'"'/), d ^^"/i- In the figure d the keel puneta ai'e a little too lon<;-. They were, however, some- 

 what, but only slightly, elongated, 

 e. 2 valves belonging to one cell, one of them in valvar view, showint;- a veiy excentric keel; ''■'"/ 1. The valve is, however, 

 perhaps lying somewhat obliquely. 

 - f. A twin cell of a different foi'm, perhaps not belonging to X. lu/brida: "'^"/i- The Skjerstad Fiord XII, -^/t 1900. 0— .50 m. 

 .57 ;• long, the bi'eadth (of the cell! 7 <<.; 12 — 14 keel puneta on 10 \>.. About 27 striæ on 10 n. 

 ., 13. A', lanceohdn no: jii/gmæa Cl. Valve (in valvar view), ''■'"'1. Lille Molla, "A 1899. 30 [i- long, 4 |). broad. Keel puneta 

 small, about 14 on 10 \>., in the middle of the valve wanting; there is a trace of a central nodule. Hardly belongs to AT. 

 Innceolata W. Sm. 

 ., r4. A', angularis var. Åariana Gkun., ^°7i. 



a. Cell in side view, from Seivaagen (Salten), ^V 1900, 0— 20 m. 54 \>- long, 8 |i broad; 5-(; keel puneta on 10 [j-, much 

 closer at the ends, scarcely more distant in the middle. No transverse striæ were seen. 



b. Valvar view. Lille Molla, V4 1899, m. 30 ij. long, 4 |). broad; 4V3 keel puneta on 10 m.. The longitudinal lines which 

 accompany the keel, are badly reproduced. 



