LISTE

Per. tripos ÉHRENBERG.

Per tristylum ? BROCH. .

Per tuberosum sp. nov.

Per. umbonatum STEIN . . .

Per. umbonatum var. inae-

quale LEMMERMANN Per. Willei HUITFELD-KaAS

Per. Yserense sp nov..

PERIDINIOPSIS LEMMERMANN .

Perid. assymetrica MANGIN. POLYKRIKCS.

Poly. species .

POROCERATIUM .

PROPERIDINIUM gen. nov. .

Prop. aspinum (PAULSEN)nobis.

Prop. apiculatum (EHR.) nobis.

Prop. avellana sp. nov.

Prop. Heterocapsa(STEiN)nobis Prop. inaequale (LEMM.) nobis .

Prop. Thorianum (PAULSEN) nobis .

Pages. Planches.