PLATE 4 



Enteric valve armature. Some valves are mounted whole and viewed from side or end on, 

 others slit and opened out. 



Figs i & 2, Apagoterm.es stolidus; 3 & 4, ' Atenchotermes' undescribed species with all cushions 

 equally developed; 5, Ateuchotermes tranquillus; 6 & 7, Atenchotermes pectinatus. 



