Plate IX. 



4, 8, 9, IS, i6, i8, 21, 26, 30 — 39 Urecliinus naresiamis. 2, 6, 11, 12, 25, 27 tt giganteus. 3, 5, 17, 24 K Wyvillii. 19 K Loveni. 



I, 7, 10, 13, 14, 20, 22, 23, 28, 29 Cystechinus clypeatus. 



Fig. I 



— 2 



— 3 



— 4 



— 5 



— 6. 



— 7 



— 8, 



— 9' 



— 10. 



— II 



— 12 



— 13 



— 14- 



— 15 



— 16, 



— 17 



— 18. 



— 19. 



— 20. 



— 21 



— 22 



— 23 



— 24. 



— 25. 



— 26 



— 27 



— 28 



— 29, 



— 30. 



— 31 



— 32 



— Il 



- 35 



- 36. 



- 37 



- 38. 



- 39. 



Cystechimis clypeatus («Challenger» St. 133), globiferous pedicellaria. 1°]-^. 



Urecliinus gigantens, valve of globiferous pedicellaria, side view. (Comp. Fig. 6). '^5/j. 



— Wyvillii, _ . — _ _ _ 125/,. 



— narcsianus («Challenger» St. 302), valve of ophicephalous pedicellaria. "5/^. 



— Wyvillii, valve of globiferous pedicellaria, from tlie inside, '^s^. 



— gigantens, — - — — — - — (Comp. Fig. 2). '^5/j. 

 Cystccliinus clypeatus (<-Challenger > St. 205), ophicephalous pedicellaria. 37/j. 



Urecliinus naresiamis, spicule from tube-foot. '^5/,. 



— — valve of globiferous pedicellaria, from tlie inside, '^s/j. 

 Cystechinus clypcattt-s (? Challenger > St. 205), valve of ophicephalous pedicellaria. so/j. 

 Urcchimcs gigantens, valve of ophicephalous pedicellaria. '^5/^. 



— — — - triphyllous — '^5/,. 



Cystechimis clypeatus («Challenger> St. 334), valve of ophicephalous pedicellaria. '^5/^. 



— — ( — - 205), — - tridentate — 7°/i. 

 Urecliinus naresianus, valve of tridentate pedicellaria, coarse form. 7%. 



— Wyvillii, — - — — ^^/i. 



— naresianus, — - ophicephalous — '^s^^^ 



— Loveni, — - tridentate — 5°/^. 



Cystccliinus clypeatus (»Challengers St. 334), valve of tridentate pedicellaria. ^°^^. 

 Urecliinus naresianus («Challenger > St. 302), valve of coarse tridentate pedicellaria. ^°l^,. 

 Cystechinus clypeatus (<;Challeuger» St. 205), valve of ophicephalous (?) pedicellaria. 7°/i. 



— — ( — - 133), — - short tridentate — 7°/i. 

 Urechimis Wyvillii, valve of globiferous pedicellaria. "S/j. 



— gigemteus, — - large tridentate — 70/j. 



— naresianus, — - triphyllous — '^s/j. 



— giganteus, — - small tridentate — ^°|^. 



Cystechinus clypeatus (<.:Challenger» St. 205), valve of small tridentate pedicellaria. 7°/]. 



— — ( - - 334), — - triphyllous - '^5/,. 

 Urechimis naresianus, primary spine from the abactiual side. 37/,. 



— — miliary — 70/,. 



— — tridentate pedicellaria, coarse form. 5>)/j. 



— — — — slender — 70/,. 



— 34 — — valve of tridentate pedicellaria, slender form. "5/^. 



globiferous pedicellaria. ^°|^. 



valve of tridentate pedicellaria, slender form. '^5/,. 



ophicephalous pedicellaria. 7°/,. 



tridentate pedicellaria, slender form. 7°/,. 



spine from the peristome. 37/,. 



