Plate XVIII. 



I, 6, 12, 18, 25, 26 Brissopsis lyrifera. 3, 23 var. capensis. 7, 8, 14 nBr. lyrifera,*, Simon's Bay, Challenger. 4, n, 22, 27, 29 

 .Sr. a/to. 5, 9, 10, 13, 19, 20, 24 Br. atlanlica. 2, 1517, 21, 28 -Sr. elongata. 



Fig. i. Brissopsis lyrifera, valve of globiferous pedicellaria, side view. (Comp. Fig. 25). 5 /i. 



2. elongata, - ophicephalous ^s/,. 



3. lyrifera, var. capensis, valve of globiferous pedicellaria. so/,. 



4. a/to, valve of triphyllous pedicellaria. '7S/,. 



5. atlantica, globiferous pedicellaria, short form. 37/,. 



6. lyrifera (Mediterranean), valve of globiferous pedicellaria. ?%. 



7. <s.lyrifera (Simon's Bay, Challenger), valve of ophicephalous pedicellaria. (Comp. 

 Figs. 8, 14). '75/,. 



8. <i.lyrifera ( side view. 

 (Comp. Figs. 7, 14). '75/,. 



9. atlantica, valve of globiferous pedicellaria, short form. (Comp. Fig. 19). 5<y iP 



10. - ophicephalous I75 /i- 



- ii. alia, - triphyllous (Comp. Fig. 4). ^s/,. 



- 12. lyrifera, ^s/,. 



13. atlantica (?, young specimen, Gulf Stream), valve of ophicephalous pedicellaria. ^s/^ 



14. <ilyriferai> (Simon's Bay, Challenger), valve of ophicephalous pedicellaria. (Comp. 



Figs. 7, 8). '75/,. 



- 15. elongata, valve of globiferous pedicellaria. (Comp. Fig. 21). 5/j. 



16. spicules from tube-foot ^s/j. 



17. rosette-plate of frontal tube-foot. I2 s/ t . 



- 18. lyrifera, spicules from tube-foot. '75/j. 



19. atlantica, valve of globiferous pedicellaria, short form. (Comp. Fig. 9). so/j. 



20. globiferous pedicellaria, slender form. 4%. 



- 21. elongata, valve of globiferous pedicellaria. (Comp. Fig. 15). so/,. 



- 22. //, sphseridia. w/,. 



23. lyrifera, var. capensis, upper end of stalk of globiferous pedicellaria. 3?/,. 



24. atlantica, valve of globiferous pedicellaria, elongate form. so/,. 



- 25. lyrifera, (Comp. Fig. i). so/,. 



- 26. globiferous pedicellaria. 2 %. 



27. tf/AZ, 3 ?/!.' 



28, elongata, 37/,. 



29. <#, valve of globiferous pedicellaria. 7/,. 



