LIST OF ILLUSTRATIONS. XIII 



Page. 



FIG. 47. Ophiopholis aculeata var japonica. a, extreme form with small sup- 

 plementary upper arm plates and numerous long disk spines, X 2.66; 

 b, more usual form with fewer disk spines, X 3.33; c, unusual form 

 with many disk scales resorbed, X 3.5; d, typical form without disk 

 spines, X 4 127 



48. Ophiopholis aculeata. X 3. From above 131 



49. Ophiopholis aculeata var. kennerlyi. X 2.66. From above 133 



50. Ophiactis pteropoma. X 10. a, from above; b, from below; c, side 



view of three arm joints near disk 134 



51. Ophiactis brachygenys. X 10. a, from above; b, from below; c, side 



view of two arm joints near disk 136 



52. Ophiactis dyscrita. X 20. a, from above; 6, from below; c, side 



view of two arm joints near disk 137 



53. Ophiactis brachyaspis. X 16. a, from above; 6, from below; c, side 



view of three arm joints near disk 138 



54. Ophiactis gymnochora. X 10. a, from above; b, from below; c, side 



view of three arm joints near disk 139 



55. Amphiura carchara. X 6. a, from above; 6, from below; c, side 



view of three arm joints near disk 142 



56. Amphiura leptodoma. X 15. a, from above; 6, from below; c, side 



view of two arm joints near disk 143 



57. Amphiura euopla. a-c, X 5; c?, young, X 10. a, from above; b, from 



below; c, side view of three arm joints near disk; d, side view of two 



arm joints from a young specimen 144 



58. Amphiura aery stata. a-/, X 5; g-i, X 4; a-c, type, a, from above; 



6, from below; c, side view of two arm joints near disk; d, another 

 specimen from above; e, from below; /, side view of two arm joints 

 near disk; </, another specimen, from above; h, from below; i, side 

 view of three arm joints near disk 146 



59. Amphiura ecnomiotata. X 8. a, from above; 6, from below; c, side 



view of three arm joints near disk 148 



60. Amphiura trachydisca. X 4. a, from above; 6, from below; c, side 



view of two arm joints near disk 149 



61. Amphiura micraspis. X 12. a, from above; 6, from below; c, side 



view of three arm joints near disk; a 7 , side view of an arm joint near 

 middle of arm 151 



62. Amphiura pycnostoma. X 12. a, from above; 6, from below; c, side 



view of three arm joints near disk 152 



63. Amphiura psilopora. X 12. a, from above; 6, from below; c, side 



view of three arm joints near disk 153 



64. Amphiodia urtica. X 6. a, from above; 6, from below; c, side view 



of three arm joints near disk 154 



65. Amphiodia craterodmeta. X 6. a, from above; 6, from below; c, 



side view of three arm joints near disk 155 



66. Amphiodia macraspis. X 5. a, from above; 6, from below; c, side 



view of three arm joints near disk 157 



67. Amphiodia euryaspis. X 4. a, from above; 6, from below; c, side 



view of three arm joints near disk 159 



68. Amphiodia periercta. X 3.5. a, from above; 6, from below; c, side 



view of three arm joints near disk; a 7 , a much younger specimen, 



from above, X 9 160 



69. Amphiodia ancistrota. X 5. a, from above; 6, from below; c, side 



view of three arm joints near disk; d, next to the lowest arm spine, 



X 10 161 



