Translation 2816

41
II. Transverse groove lies open.
(a)*Transverse groove is not distinctly helical.. The longitudinal
groove does not extend, or extends only -very little, onto the
apical portion.
1. Anterior part of body is semicircular s?r.hemispherical.
M. stigmatica 2.
2. Anterior part of body is cassideous, _sonewhat tapered.
M. yorticella 3.
3. The anterior part : is conical; the apex is cuspidate..
M. Schilleri 4.
(b) Transverse groove is distinctly helical; longitudinal groove
extends îar onto the apical portion. M. Woloss,ynsr.ae 5-
t^i.
l+ _ l J l _ ^ 7 X- 1 • 1 l .. .L .1• ... ... ._ 1 C J. .`. .,,
^rirt^ma'^vpriores ^xéSéil'^ . ^.bls .i. are uoâu.i. LY° y o'va âriu .1.1d til G11Cü • uva^Tila
not observed. . . . . . . + . . . . . . . M. plana 6
Division of thé order Reridiniales into familiesb (157)
In order'to avoid repetitions in the text, no detailed treatment of
1)A.tte_r71s
in which the plates are arranized is included here. The reader is
advised to peruse at this point the introduction to the Renus Peridinium, where
the structure of the armor is discussed, since acquaintance with the
panelling,patterns is assumed in connection with the folloti•ring classification.
A. Coverings consisting of a solid membrane, rarely delicate, often
panelled uniformly or with large, dissimilar polygons (hardly visible
without prior processing); some species exhibit markedly varying panelling
patterns. . . . . . . . . . . k'amily:.3lenodiniaceac
(partially)
(p. l651)•