GIGANTOCYPRIS MOLLERI 



197 



Fig. 2. Parasaggital section (a) and transverse section (b) of Gigantocypris embryo to show origin of circular 

 muscle from dorso-lateral trunk ectoderm ( x 195). Corresponding sections (c) and (d) of adult for com- 

 parison ( X65). cm. circular muscle; d.l.m. dorsal longitudinal muscle; ex. ectoderm cells. 



