Plate III. 



2, 3, 7, ii, 12, iS, 20—23 Brissopsis lyrifera. 5, S, 9, 13, 16 Br. alia. 6. 10, 17 Br. allanlica. 1 Brissopsis sp. 



4, 14, 15, 19 Br. elongala. 



Fig. i. Brissopsis sp. (« Talismans), abactinal side. Vi- 



_ 2. — lyrifera, abnormal specimen, aetinal side. I / I . 



— 3. — — («Thor»), abactinal side. l / z . 



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



— 5. — a/fa («Blake», St 49), abactinal side. l / x . 



_ 6. — atlantica («Albatross», St. 2378), abactinal side, '/i- 

 7. — lyrifera, abnormal specimen, aetinal side. 1 j 1 . 



— 8. — alia ( Blake», St 49), aetinal side. I / I . 



_ 9 . — — («Albatross», St. 2401), aetinal side. I / I . 



— io . allanlica (« Albatross », St. 2378), aetinal side. I / I . 



— 11, — lyrifera, abnormal specimen, aetinal side. I / I . 

 _ 12. — — (Mediterranean), abactinal side. I / 1 . 

 _ 13. — alia (<sAlbatross», St. 2401), abactinal side. l / T . 



— 14. — elongata, side view. 1 / I . 



— 15. — — abactinal side. x /i- 



_ 16. — alia (Albatross», St. 2401), side view. 1 / I . 



— 17. — atlantica (« Albatross*, St. 2748); abactinal side. Vj. 



— !§. _ lyrifera (Bergen), side view. 1 j 1 . 

 ig. — elongata, aetinal side. I / I . 



— 20. — lyrifera (Mediterranean), aetinal side. 1 j 1 . 

 _ 21. — — (Bergen), abactinal side. 1 j 1 . 



22. — — aetinal side. 1 / I . 



23. — — (Mediterranean), abactinal side. I / 1 . 



