MEDUSA. 175 



PLATE 10. 



Fig. 41. Erscea angustata, sp. nov. The monogastric sexual generation of Diphy- 



opsis angustata. 



'•' 42. Diphyopsis angustata Haeckel. Enlarged view of one of the units upon the 



siphosome. (b) Immature swimming-bell ; 

 (c) covering-scale; (/>) polypite ; (ss) sipho- 

 some; (f) tentacle. 



; ' 43. Physalia utriculus Eschscholtz. Young individual 2 mm. in length ; with pri- 

 mary polypite and tentacle. 



" 44. . " " " Young individual 4 mm. in length; with sec- 



ondary tentacle and polypite. 



" 45. Aglaisma quincunx Mayer. The monogastric sexual generation of Abyla 



quincunx. 



PLATE 11. 



Fig. 46. Abyla quincunx Chun. Specimen obtained at Suva, Fiji. 



" 47. " " " Terminal nematocyst-battery of a tentacle. 



" 48. Abyla Huxleyi = Calpe Huxleyi 



Haeckel. 



PLATE 12. 



Anthemodes 3Ioseri, sp. nov. The entire animal. 



" " Side view of the fioat. 



" " Side view of a swimming-bell. 



" " A gonostyle. <J male, 9 female gonophores. 



" '•' A feeding polypite. 



" " Side view of one of the terminal nematocyst- 



batteries of the tentacles. 



" " Side view of an immature bract. 



" " View looking down on a mature bract, show- 



ing the upper surface. 

 57. " " Lower surface of a mature bract. 



PLATE 13. 



Fig. 58. Pleurobmchia ochracea, sp. nov. 

 " 59. Lampetia fusiformis, sp. nov. 

 " 60. " " Side view of apical sense organ. 



PLATE 14. 



Track of the " Albatross." 



