MUSEUM OF COMPARATIVE ZOOLOGY. 289 



Fig. 26. Nectocalyx {Galeo/aria aurantiaca). 

 " 27. VaiAW-i. horn. t\\Q WitctotaXys. {A. papillosum). 



a. Apex. 



h. Lateral filaments. 



c. Terminal vesicle. 



d. Sacculus. 



c. Appendage to the float (undeveloped polypite ?). 



/. Circular plates. 



(J. Thickened walls of the air-sac. 



p. Polypite. 



s. Sexual organs. 



PLATE Vn. 



Fig. 1. Glossocodon temiirostris. 



" 2. Larva of the same (fourth period, Haeckel). 



" 3. The same more developed (fifth period, Haeckel). 



" 4. Larva in fifth period. 



" 5. Larva in sixth period. 



" 6. Same, more developed. 



" 7. Fig. 1 from aboral pole. 



" 8. Base of the adult tentacle. 



" 9. Everted stomach walls and protruded gastrostyle. 



" 10. Aglaura vilrea. 



" 11. Eucliaris midticornis (one half body of the young). 



" 12. Same at right angles to fig. 11. 



" 13. Tiaropsis diadcmata (young). 



" 14. Quadrant of the same (oral view). 



" 15. Halicalyx tenuis (only four of the twelve marginal tentacles are drawn). 



" 16. Stauropihora laciniata. 



" 17. Tentacular knobs and " spur " of the same. 



a. Embryonic tentacles from bell walls. 



h. Ribs connecting the embryonic tentacles with the bell rim. 



c. Club-shaped tentacular bodies. 



e. Tentacular spur. 

 /. Auricle. 



Cambridge, April 1, 1882. 



