Plate XVIII. 



i, 6, 12, 18, 25, 26 Brissopsis lyrifera. 3, 23 var. capensis. 7, 8, 14 <tBr. lyrifera*, Simon's Bay, <Challenger». 4, 11, 22, 27, 29 

 j5n tf/fo. 5, g, 10, 13, 19, 20, 24 Br. allantica. 2, 15—17, 21, 28 Sj-. elongata. 



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



— 2. — elongata, — - ophicephalous — ^s/j. 



— 3. — lyrifcra, var. capensis, valve of globiferous pedicellaria. 5<y t . 



— 4. — alia, valve of triphyllous pedicellaria. 1 7S/ I . 



— 5. — allantica, globiferous pedicellaria, short form. 37/,. 



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



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



Figs. 8, 14). 175/,. 



— 8. — «dyrifera-i> ( — — — — - — — side view 



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



— 9. allantica, valve of globiferous pedicellaria, short form. (Comp. Fig. 19). s°/ s . 



— 10. — — - ophicephalous — I?5 /i- 



— 11. — alia, — - triphyllous — (Comp. Fig. 4). : 75/,. 



— 12. — lyrifera, — - — — I 75/i- 



— 13. allantica (?, young specimen, Gulf Stream), valve of ophicephalous pedicellaria. l ^/ Im 



— 14. dy.rifera» (Simon's Bay, (Challenger >), valve of ophicephalous pedicellaria. (Comp. 



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



— 15. — elongata, valve of globiferous pedicellaria. (Comp. Fig. 21). 5°/ t . 



— 16. — — spicules from tube-foot. '75/,. 



— 17. — — rosette-plate of frontal tube-foot. "S/j. 



— 18. — lyrifera, spicules from tube-foot. "75/,. 



— 19. — allantica, valve of globiferous pedicellaria, short form. (Comp. Fig. 9). 5°/ t . 



— 20. — — globiferous pedicellaria, slender form. 4°/i. 



— 21. elongata, valve of globiferous pedicellaria. (Comp. Fig. 15). 5 %. 



— 22. — alia, sphceridia. ^s/,. 



— 23. — lyrifera, var. capensis, upper end of stalk of globiferous pedicellaria. 37/,. 



— 24. — allantica, valve of globiferous pedicellaria, elongate form, s /^ 



— 25. lyrifera, — - — — (Comp. Fig. 1). so/j. 



— 26. — — globiferous pedicellaria. 2 %- 



— 27. — alia, — — 37/,. 



— 28, — elongata, — — 37/,. 



— 29. — alia, valve of globiferous pedicellaria. 7"/,. 



