46 DISCOVERY REPORTS 



Gut. In uncontracted zooids the stomach (Text-fig. 7E) has a narrow anterior end, is widest 

 just behind the middle and somewhat narrowed posteriorly. The anteroventral margin is slightly 

 concave. In the ' Discovery ' specimens the stomach is quite sharply marked off from both the oeso- 

 phagus and the intestine, although Kott (1954) did not find this in her material. The anus is situated 

 opposite the 13th or 14th row of stigmata and has two lips which are usually reflected. 



Remarks. The synonymy of this species is still obscure. According to van Name (1945), S. georgi- 

 anum Sluiter and S. kohli Sluiter should probably both be referred to S. adareanum, but I believe that 



1.0 cm 



Text-fig. 7. Synoicum georgianum Sluiter (St. 149): A, colony; B, zooid; C, fully developed larva; D, larva showing 

 break-up of papillae and ampullae. Synoicum adareanum (Herdman) (St. 1660): E, gut 



