TUNICATA 



3. Ciona. Pharynx and buccal cavity opened and viscera further exposed. Tentacular ring ; 

 peripharyngeal groove; dorsal tubercle; subneural gland; endostyle; languets and hyperpharyngeal 

 groove ; aperture from pharynx to oesophagus ; ovary ; testicular follicles on intestine. 



4. Portion of pharyngeal wall stained and mounted. Transverse bars ; longitudinal bars ; internal 

 longitudinal bars from inner side of which project the papillae; stigmata. 



D 



93 



