Plate III. 



2, 3, 7, II, 12, 18, 20 23 Brissopsis lyrifera. 5, 8, 9, 13, 16 Br. alta. 6. 10, 17 Br, allantica. I Brissopsis sp. 



4, 14, 15, 19 Br. elongata. 



Fig. i. Brissopsis sp. (Talistnan), abactinal side. '/,. 



2. lyrifera, abnormal specimen, actinal side. I / I . 



3. (Thor), abactinal side. */ t . 



4. elongata, young specimen, side view. 1 / I . 



5. alta (Blake, St 49), abactinal side. 1 / l . 



6. atlantica (Albatross, St. 2378), abactinal side, '/i- 



7. lyrifera, abnormal specimen, actinal side. */,. 



8. alta (Blake, St 49), actinal side. I / I . 



9. (Albatross, St. 2401), actinal side. I / I . 



10. atlantica ( Albatross , St 2378), actinal side. I / s . 



n. lyrifera, abnormal specimen, actinal side. I / 1 . 



12. (Mediterranean), abactinal side. I / l . 



13. alta (Albatross, St 2401), abactinal side. '/V 



14. elongata, side view, '/i- 



15. abactinal side. 1 / I . 



16. alta (Albatross, St 2401), side view. I / I . 



17. atlantica (Albatross, St. 2748); abactinal side. T / t . 



18. lyrifera (Bergen), side view. J /f 



19. elongata, actinal side, '/i- 



20. lyrifera (Mediterranean), actinal side. I / l . 



21. (Bergen), abactinal side. 1 / 1 . 



22. actinal side. Vi- 



23. (Mediterranean), abactinal side. t / I . 



