Translation 2816
Translation 2816
Translation 2816
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24<br />
consists of dissimilar polygonal plees (panels).<br />
Order II..Peridiniales 8a (P.155)<br />
Division of the family . (101)<br />
A. Transverse groove•lies near the anterior end of the cell,<br />
so that the anterior portion of the cell is very small in<br />
comparison with the posterior portion. 1.Amphidinium (P.101)<br />
B. Transverse groove lies more within the middle portion of<br />
the cell, and is circular or helical.<br />
1. Transverse groove is circular or helical. In the latter .<br />
case, the helical interval is less than one fifth of<br />
the length of the body..<br />
2. Gymnodinium (P.107)<br />
2. Transverse groove is always helical; helical interval<br />
is more than one fifth of the body length; the helix<br />
turns from one to less than 34 times. 3. Gyrodinium (P.146)<br />
C. Transverse groove lies near the posterior end of the cell, •<br />
and is hardly helical, usually circular. Longitudinal'<br />
groove is deVeloped only on the short posterior part of<br />
the body<br />
4. Massartia (P.152)<br />
Lindemann „(in ENGLER'S Nat. Pflanzenf., 1928) assigned to<br />
this group his "class" "KolkwitziellaIes", a concept which is<br />
based upon the genus "Kolkwitziella". However, since this<br />
genus cannot be maintained (it represents the encysted phase<br />
of Diplopsalis acuta), the higher units based upon it<br />
Kolkwitziellaceae" and "class: Kolkwitziellales"<br />
sensu Lindemann) must also be discarded.
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