a AA 
Diam. 10 - 46, immagines 5, 7, 8, 9, 10, 11, 12, 13, 14; 15, 
16, 17, 18, 19, 22, 24, 26, 28, 30, circa 1% in ½100 in, 
striae marginales 38, striae disci 19 in ½900 Lin. 
Act. semiocellatus m. Imagines segmentis circuli similes, 
radii simplices praevalentes, striae interradiales lineae mediae 
secloris parallelae, polus cellulis plerumque nudatus, cellulae 
rotundae alternantes; frustula in balsamo canadensi parum 
irisans. Diam, 12—15, imagines 6, 7, 8, circa 15/o ia !/1oo 
Lin, striae marginales 41, striae disci 201/2 in / Lin. 
Act. clavifer m. Imagines clavis tumidis similes, radii 
simplices mediocriter praevalentes, striae interradiales lineae 
mediae sectoris parallelae, polus cellulis carens, cellulae alter- 
nantes; frustula in balsamo canadensi plus minusve irisans. 
Diam. 8—30, imagines 4, 6, 7, 8, 10, 11, 12, 13, 17, 20, 
circa 1*/5 in ½100 Lin., striae. marginales 41, striae disci 20%/2 
in !/oo Lin. 
Aci. ancorifer m. Imago ad instar ancorae, cujus dentes 
tumidi sunt et rotundati, formata; 1adii simplices vix praeva- 
lenies, striae interradiales lineae sectoris mediae vel alteri 
radio vel ambobus radiis parallelae; polus cellulis plerumque 
tectus, cellulae ellipticae alternantes; frustula in balsamo cana- 
densi parum irisans. Diam. 10—40, imagines 4— 30, circa 
1°/ in ¼100 Lin., striae marginales 41, striae disci 20!/, in 
t/o Lin. ; t 
Act: arcuatus m. Imago baculo duplici similis, supra 
quem falx angusta pendere videtur, radii simplices mon prae- 
valentes; striae interradiales partim lineae mediae sectoris, 
partim radiis parallelae; polus cellulis carens, cellulae ellipticae 
alternantes; frustula in balsamo canadensi parum irisans. Diam. 
14— 42, imagines 6, 8, 9, 11, 12, 13, 15, 16, 18, 20, 23, 
24, 25, 26, 28, 32, cirea 2 in ½100 Lin., striae marginales 
39, striae disci 191/2 in */ıoo Lin. 
Act. cruciatus m. Imago baculo brevissimo obtuso si- 
milis, supra quem arcus in globulos transiens pendere videtur ; 
annulus angustus, radii duplices, polus interdum cellulis carens, 
cellulae rotundae vel subquadratae ita dispositae, ut simul series 
radiis subparallelae simul series lineae mediae sectoris parallelae 
existant; frustula in balsamo canadensi parum irisans. Diam. 
8— 12, imagines 4, circa 1 in !/ioo Lin.; striae marginales 
40, striae disci 20 in t/100 Lin. 
Dictyocha tripartita m. D. e tribus magnis hexagonis 
et tribus parvis cellulis non apertis composita. Diam. 11—12, 
granula marginis 16, striae zu. 31 in ½00 Lin. Aehnlich 
ift Dict” triommata Ehg. Mik. XXXIII. xv. 11, die indef nur 
3 große, keine kleinen Zellen hat, auch mit längeren Stachelfort⸗ 
ſätzen verſehen ift, die hier kaum angedeutet find. i 
