Translation 2816
Translation 2816
Translation 2816
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47<br />
Panelling formula: 3 1 1a7"5"2".<br />
Cells are oval, somewhat flattened, valves both the same size,<br />
hemispherical. Apical aperture is on the line of separation<br />
between 2 1 and 3 1 . Panelling pattern varies greatly. Covering<br />
is smooth. Length 23 9.<br />
Stigma small, bacilliform. Often surrounded by a considerable<br />
gelatinous corona.<br />
Gl. oculatum<br />
Two genera: Peridinium, Ditlousalis<br />
A. Cell body is not compressed between the poles; its shape is<br />
spherical, ellipsoidal, ovoid, or elongatedly oonical. Number of<br />
plates 21-20, of which 14 or 13 are borne on<br />
the epivalve<br />
and 7 on the hypovalve. Plate formula: 4 1 3-0a7"5" 1 2".<br />
Peridinium (P. 180)<br />
B. Cell body is compressed between the poles, so that it is lenticular<br />
to turbinate. Number of plates 19(18); epivalve 13(12), hypovalve<br />
6(7). Plate formula: 4 1 1(-2)a6(7)"5" 1 1(2)". Diploosalis (P.248)<br />
1. Cells are oval to spherical; rhomboid plate is very large,<br />
and longitudinal groove is distinctly displaced towards the right,<br />
fitting obliquely; hyaline crests of variable<br />
size occur<br />
on the apical and antapical plates. P. Willei 1.
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