PLATE 6. 



Fig. 1. Roronstruction of posterior end of Ichthyoinenia porosa. 



Fig. 2. Same of Dondersia oalifornica. 



Fig. 3. Siwiie of Drepanomenia vampyrella. 



Fig. 4. Same of Dorymenia acuta. 



Fig. .'). Same of anterior end of Lopliomenia spiralis. 



Fig. 6. .Junction of pharynx and stomach-intestine in Strophonienia scandens, showing opening 

 of the ventral salivary gland and a portion of the labio-buccal system. 



Fig. 7. Reconstruction of posterior end of Strophoinenia scandens. 



Fig. 8. Same of Chaetoderma hawaiiensis. dso dorso-terminal groove; gn suprarectal com- 

 missure; nd, coelomoduct; rpo reno-pericardial opening. 



