MEDUSAE. 1<>5 



PLATE II. 



Tentacle of Dipwrma sp. 1 (p. 133). Lateral view, x 35. 



Manubrium of Dipwrena, showing the gonads and stomach. (Slightly contracted.) x 20. 



Tentacle of I'rolmscidnrtyln minium, n. sp. (p. 13G). Inner view, x 60. 



Tentacle of Gonionemus hornclli, n. sp., showing the position of the adhesive disc (A.) Outer 



view. Enlarged. 

 Mqwrea parva, n. sp. (p. 1-tG). Oral view, x 10. 

 Portion of the sub-umbrella of Mqwrea parra, showing the oral lips (Or.), the lower wall of the 



stomach (St.), the gonad (<?.), and a tentacle, x 20. 

 Sense-organ of Mqwrea parva. Optical section, x 400. 

 Odocanna polynema (Haeckei.) (p. 144). Oral view, x 5. 



Tentacle of Odocanna polynema, and also marginal bulbs and sense-organs. Outer view, x 40. 

 Sense-organ of Odocanna polynema. Optical section, x 400. 

 11 to 15. Mesonema pensile, Modeer (p. 147). 

 Sense-organ. Optical section, x 400. 

 Tentacle and marginal bulbs. Outer view, x 10. 

 Clusters of neniatocysts on the tentacle, x 80. 

 Portion of the stomach and sub-umbrella, showing the oral lips (Or.), the lower wall of the 



stomach (St.), the radial canals (li.) and gonads (67.). 



R and E" are radial canals at an early-stage development, x 5. 

 Marginal bulbs and sense-organs, x 16. 

 Portion of the sub-umbrella of Mqwrea arnica, showing the oral lips (Or.), the lower wall of the 



stomach (St.), the gonads (G.) and tentacles, x 10. 

 Gonad (female) of Mqwrea arnica. Lateral view, x 15. 

 Sense-organ of Mqwrea conica.. Optical section, x 400. 



PLATE III. 



Fig. 1. Manubrium of Eutima currn, n. sp. (p. 138), showing the peduncle with gonads and stomach, x 9. 

 2. Portion of the margin of the umbrella of Eutima curva, showing the basal bulb of a tentacle, the 



marginal bulbs and cirri. Outer view, x 50. 

 ,, 3. Sense-organ, marginal bulbs and cirri of Eutima currn. Oral view, x 100. 

 ,, 4. Manubrium of Octorchis orientalis, n. sp. (p. 139), showing the peduncle with gonads and stomach. 

 xlO. 

 Figs. 5 to 8. Irenopsis hexanemalis. 



Fig. 5. Tentacles and marginal bulbs, showing the excretory papilla? fully expanded. Outer view, x 30. 

 6. Tentacles, marginal bulbs, and sense-organs (papillae contracted), x 30. 

 7. Sense-organ. Optical section, x 400. 

 ,, 8. The stomach and its peduncle. Lateral view, x 10. 

 9. Irene ceylonensis, n. sp. (p. 140). Oral view of the umbrella, showing the stomach and its peduncle, 



the position of the gonads, and the tentacles in one quadrant of the umbrella, x 3. 

 ,, 10. Sense-organ of Irene ceylonensis. Optical section, x 400. 

 ,, 11. Tentacles and sense-organs of Irene ceylonensis. Outer view, x 30. 

 ,, 12. Irene palkensis, n. sp. (p. 141). Oral view of the umbrella, showing the stomach and its peduncle, 



the position of the gonads, and the tentacles in one quadrant of the umbrella, x 4. 

 13. Tentacles, marginal bulbs, and sense-organs of Irene palkensis. x 40. 

 Figs. 14 to 16. Sense organs of Irene palkensis. x 400. 



