Plate XII. 



4, 6, 9, 18—20, 22, 23, 26, 27, 29—31 Echinocyamus pusillus, i, 3, 5, S, 10—16, 21, 25, 28 Ech. grandiporns. 2, 7, 17, 24 



Æc^. macrosiojnus. 



Fig. I 



- 2 



- 3 



- 4 



- 5 



- 6. 



- ?• 



— 9' 



— 10. 



— II 



— 12 



— 13' 



— 14 



— 15 



— 16, 



— 17 



— 18 



— 19 



— 20. 



— 21 



— 22, 



— 23 



— 24. 



— 25, 



— 26. 



— 27, 



— 28, 



— 29. 



— 30. 



— 31 



Echinocyamus grandiporus , actinal side. ^-s/j. 



— macrostoimis, oi3hiceplialous pedicellaria. 325/^. 



— grandiporus, actinal part of the test, from the inside. 7/i. 



— piisillus, ophicephalous pedicellaria. 37/,. 



— grandiporus, abactinal side. ^-s/,. 



— ptisillus, head of ophicephalous pedicellaria. 325/,. 



— niacrostofHus, triphyllous pedicellaria. '^'<°\i. 



— grandiporus, valve of ophicephalous pedicellaria, (the two other valves of tlie 



same pedicellaria are represented in Figs. 11 and 12). 325/,. 



— pusillus, endcrown of miliary spine, from above. 325/,. 



— grandiporus, — - — — — — 325/,. 



— — valve of ophicephalous pedicellaria. (Comp. Figs. 8 and 12.) 325/j. 



— - -- - _(__-8- II.) 325/,. 



— — ophicephalous pedicellaria. 325/j. 



— — part of the test, showing the glassy protuberances among the spine- 



bearing tubercles. 5°/,. 



— — primary spine. 5°/,. 



— — miliary — '75/,. 



— macrostoinus, young specimen, abactinal side. 7i- 



— piisillus, miliary spine. '75/,. 



— — primary — 5°/,. 



— — valve of triphyllous pedicellaria. 325/,. 



— grandiportis, valve of triphyllous pedicellaria. 325/,. 



— pusillus, part of the test, showing the glassy protuberance between the pores 



of the petals. so/,. 



— — valve of tridentate pedicellaria. 325/,. 



— macrostoinus, actinal side. ^i- 



— grandiporus, valve of tridentate pedicellaria. 325/,. 



— pusillus, part of the actinal side of the test, showing the two large buccal pores 



and groups of small pores. 37/,. 



— — actinal side. ^/i. 



— grandiporus, tridentate pedicellaria. '75/i- 



— pusillus, actinal part of the test, from the inside. 7/,. 



— — tridentate pedicellaria. '^5/,. 



— — abactinal side. ^j. 



In the figures i, 5, 17, 24, 16 and 31 the small pores are made somewhat more conspicuous 

 than they are in nature. 



