Zhou Zuren, Zhu De-shou, Li Fuyu & Hu Yao-hua:

       Depositional agent and biological action in the east part of the South China epiconti-
   nental sea are chiefly controlled by the land uplifting of its southeastern edge since the
  Maokouan Stage.  The facies zones of the deposits along the seashore are arranged from
  land to shallow sea in a regular genetic series- I . Continental coal-bearing deposit;
   II . Transitional coal- bearing deposit; III . Restricted sea ammonoid-bearing (siliceous)
   muddy deposit, IV. Restricted plattform -fusulinid-bearing carbonate deposit and V .
   Open-platform fusulinid-bearing carbonate deposit.  In addition, Zone VI. occurs beyond
   the reef or beach on the slope of the continental margin, but it is not the subject of this pa-
   per.  The facies zones migrate with tlie Middle-Late Permian regression process north-
   westward in accordance with each other.  The Shouchangeceras fauna was exclusively
   found in the (siliceous) mudstone near the coal series on the east side and the fusulinid-
   bearing limestone on the west side.  Its obviously endemic character in taxonomy suggests
   the restricted living environment.  In contrast, the contemporaneous ammonoids and de-
   posits developed in the slope of the continental marginal sea in southwestern Guizhou and
   northwestern Guangxi (zone VI), are completely different from those of the Zone III.
   Zhou (1986) named the latter the "open sea of  Nandan pattern" and the former the "re-
   stricted sea pattern".
        This paper is composed of five parts: 1). Preface; 2). South China Permian sea and
   setting of its nearshore sea; 3). Subdivision and correlation of  Maokouan strata in the
   near shore sea; 4). Background of paleogeography and analysis of paleoenvironment; 5).
   Restudy of Shouchangoceras-fauna, with four plates attached to show some topotypes of
   the Shouchangoceras-fauna newly collected from western Zhejiang by the authors in 1993.