PLATE XVII 



Fig. I. Cosmetirella daviii (Brovfne). Lateral view of an adult. 



Figs. 2-4. Phialella falklandica Browne. 

 Fig. 2. Lateral view of an adult. 

 Fig. 3. An intermediate stage. 

 Fig. 4. A statocyst. 



Figs. 5-9. Phialidium simplex Browne. 

 Fig. 5. Intermediate stage, oral view. 

 Fig. 6. An adult, lateral view. 

 Fig. 7. Margin of the umbrella, showing tentacles and statocysts, outer 



(abaxial) view. 

 Fig. 8. The mouth of an adult. 

 Fig. 9. Diagrams showing the growth of the ovaries. A, umbrella 



3 mm. in diameter; B, 4 mm.; C, 6 mm.; D, 10 mm.; 



E, 15 mm. ; F, 20 mm. 



Figs. 10-12. Witlia mutabilis Browne. 



Fig. 10. The clusters of nematocysts on the exumbrella, near the 



margin. 

 Fig. II. The mouth expanded, of an early stage, showing the lips, and 



commencement of the folds. 

 Fig. 12. Transverse section of ovary. 



