42 DISCOVERY REPORTS 



Gut. The oesophagus is short in all zooids examined, and the stomach (st.) barrel-shaped with 

 from twenty to twenty-four narrow close longitudinal folds. The intestinal loop is usually rather 

 short. The anus has two shallow lobes and is situated opposite the 5 th or 6th row of stigmata in zooids 

 with twelve rows. 



Post-abdomen. In some zooids the post-abdomen is short but when fully grown it is very long and 

 narrow, extending far down into the basal sand-covered test. It is typically very slender, being only half 

 the width of the abdomen. 



0.5 mm 



Text-fig. 6. Aplidium stanleyi sp.n. (St. WS 229): A, colony; B, zooid; C, transverse section of stomach. 

 Aplidium quadrisulcatum sp.n. (St. 939): D, colony; E, zooid. 



