MUSEUM OF COMPARATIVE ZOOLOGY. 287 



c. Sne (suluinibi'al). 



/. Margin of the bell. 



gf. Gastial tilaineiits. 



h. Patclies of pigment. 



i. Sul)stance of the bell. 



k. Pouches. 



Is. Row of |)igineiit-spots on the walls of the stomnch. 



0. Ovary. 



p. Chyniiferous reservoirs. 



p'. Oral tentacles. 



oL Otocyst. 



so. Sexual openings through which the ova are discharged. 



PLATE IV. 



Fig. 1. " Sense area " (i)croc oi-«te). 



2. Hcditiara formosa. 



3. Ephyra (?) of Lincrgcs Mcrcurius. (Quadrant of disk from below.) 



4. E[)hyra {L. Mcrcurius) younger tlian fig. 3. 



5. Ovaries and subunibral jiouches (X. Mcrcurius). 



6. Subumbral pouch (Z. Mcrcurius adult). 



7. 8, r», 10, n, 12. Eggs and stages of their segmentation {L. Mcrcurius), 



13. Planula (Z. Mcrcurius). 



14. Ephyra (?), (Z. Mcrcurius). 



15. Ephyra more develojied than fig. 3. (Octant.) 



16. ]\Iarginal sense body of e[)hyra (Z. Mcrcurius). 



17. The same (side view). 

 IS, 19. Marginal sense body (Z. Mcrcurius adult). 



20. G astral filaments (Z. Mcrcurius). 



21. Tentacle and bell margin (Z. Mcrcurius). 



22. Single mai-ginal tentacle (Z. Mcrcurius). 



P'.ATE V. 



Fig. 1. Stcphmiomia Atlantica. 



2. Agalmo'psis frc(gile. 



3. Athoryhia formosa. 



4. A. formosa. (From above.) 



5. Agalma papiJIosum. 



6. A. papillosuvi. (From above.) 



