Plate 37. 



All figures are from unretouched photographs. 

 Eirene medusifera, sp. nov. 



Fig. 1. One quadrant of bell margin. The positions of the otocysts are indicated by the 

 white arrows ; and the otocysts themselves (etc) can be seen on careful exam- 

 ination ; (t.ra) radial tentacle. X about 20. 



Fig. 2. Base of tentacle flanked by lateral cirri (ci). X 45. 



Fig. 3. Rudimentary tentacle, flanked by lateral cirri (ci). X 45. 



Fig. 4. Otocyst, containing two otoliths. X about 250. 



Fig. 5. Distal portion of radial canal, along which no gonad is yet developed, but which 

 bears medusa buds, b*, b^, in various stages of development, x about 50. 



Fig. 6. Lateral view of medusa with one side of the bell dissected away so as to show the 

 form of the peduncle (pd), and of the manubrium (mn). X 10. 



Fig. 7. Radial canal (era), bearing medusa buds nearly ready to be liberated ; (mn) man- 

 ubrium, and (t) tentacle, of medusa bud. X about 50. 



Fig. 8. Oral view of a portion of the bell, showing radial canal with gonad (go) bearing 

 medusa buds, x about 30. 



Fig. 9. Phialucium comata, sp. nov., tentacle base and otocyst (etc). X about 30. 



Fig. 10. Phialucium comata. Tentacle base showing lateral cirri (ci). X about 30. 



Fig. 11. Eutimalphes scintillans, sp. nov. One quadrant of bell margin. The positions 

 of the two otocysts are indicated by the white arrows. The otocysts themselves 

 can be seen on careful examination ; (era) radial canal ; (t.ra) radial tentacle ; 

 (go) gonad ; (v) velum. X 10. 



Fig. 12. Phialucium comata. Portion of bell margin showing marginal organs. The 

 positions of two otocysts, which are plainly visible, are indicated by white 

 arrows ; (t.ra) radial tentacle ; (era) radial canal ; (go) gonad. X 15. 



