Fig. 6. — The entire Medusa in profile, ten times the natural size ; crawling on the 

 ground like an Eehinoderm, with sucking tentacles, which partly adhered by suction 

 like anibulacral feet, partly move about as if groping. (Drawn by me from life in Pola.) 



Fig. 7. — The entire Medusa, in profile, ten times the natural size, anchored on its 

 back. The long oesophagus, surrounded at the base by the corona of genitalia, projects 

 and moves tentatively from the narrow opening of the strongly contracted velum. 

 Tentacles as in fig. 10. (Drawn by me from life in Pola.) 



Fig. 8. — A piece of the umbrella margin, greatly enlarged, seen from below and 

 inside, wn Urticatino; knobs of the subumbrella. wr Distal end of the mesogonia. 

 g Chordal ring of the endodermal cells, above the circular canals (?). xp Black 

 pigmented, waved ring of cilia below the circular canal, xo Olfactory depression (?). 

 td Tactile tentacles, tc Sucking tentacles, ok Auditory club. 



Fig. 9. — Perradial section through the umbrella ; the front half of the umbrella is 

 removed leaving intact the central oesophagus with the corona of genitalia ; thirty times 

 the natural size. u Gelatinous substance of the umbrella. wr Mesogonia. s Sperm- 

 arium. miv Muscular plate of the subumbrella. wn Urticating knobs of the sub- 

 umbrella, zt (Esophagus, al Oral lobes, y Chordal ring on the subumbral wall 

 of the circular canal (?) xo Sense body with ciliated depression (olfactory depression ?). 

 oh Auditory club. Of the eight mesogonia (wr) three are cut away and five are 

 preserved. 



Fig. 10. — The entire Medusa in profile, twenty times the natural size. Whilst the 

 sucking tentacles adhere below to the ground, the tactile tentacles are directed upwards 

 and grope freely about. (Drawn by me from life in Pola.) 



