PLATE IV. 



I. Stephanoceros Eichhornii, side view ........ H 



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



!) & 10. the same a little later G 



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



14 & 15. 18 and 30 horn's after being hatched G 



Details of Stephanoceros Eichhornii. 



2. Head, dorsal view H 



3. „ ventral view H 



4. „ side view H 



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



w reath ............ H 



0. Tropin H 



7. Ovary (after Dr. Leydig) 



10. A budding tentacle (after Mr. Bossiter) 



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



