PLATE IV. 



1. Stephanoccros Eichhornii, side view ........ H 



8. Young female just hatched, adhering to the glass cover head downwards . G 



9 & 10. the same a little later G 



11, 12, & 13. 3, 8, and 11 hours after being hatched G 



14 & 15. 18 and 30 hours after being hatched ....... G 



Details of Stc2)hanoceros Eichhornii. 



2. Head, dorsal view ............ H 



3. ventral view ........... H 



4. side view ............ II 



5. seen dorsally in the plane passing through the knobs of the ciliary 



wreath ............ H 



6. Trophi H 



7. Ovary (after Dr. Leydig) 



16. A budding tentacle (after Mr. Rossiter) 



17. The same a little more developed (after Mr. Rossiter) 



