XII LIST OF ILLUSTRATIONS. 



Page. 

 FIG. 22. Ophiura sterea. X 2.5. a, from above; 6, from below; c, side view 



of base of arm 76 



23. Ophiura megapoma. X 3. a, from above; 6, from below; c, side 



view of three arm joints near disk 79 



24. Ophiura hadra. X 1.75. a, from above; b, from below; c, side view 



of base of arm 81 



25. Ophiura stiphra. X 3. a, from above; 6, from below; c, side view of 



base of arm 83 



26. Ophiura penichra. X 2. a, from above; 6, from below; c, side view 



of three arm joints near disk 84 



27. Ophiura atacta. X 8. a, from above; 6, from below; c, side view of 



two arm joints near disk 86 



28. Ophiura brachyactis. X 3. a, from above; 6, from below; c, side 



view of base of arm 87 



29. Ophiura pomphophora, adult. X 3.5. a, from above; b, from below; 



c, side view of three arm joints near disk 89 



30. Ophiura pomphophora, young. X 10. a, from above; 6, from below; 



c, side view of three arm joints near disk 90 



31. Ophiura glyptodisca. X 8. a, from above; 6, from below; c, side 



view of three arm joints near disk 91 



32. Anthophiura axiologa. X 10. a, from above; 6, from below; c, side 



view of three arm joints near disk 93 



33. Ophiotrochus longispinus. X 8. a, from above; b, from below; 



c, side view of three arm joints near disk 94 



34. Ophiernus adspersus. X 3.33 a, from above; b, from below; c, side 



view of three arm joints near disk : 96 



35. Ophiocten charischema. X 5. a, from above; b, from below; c, side 



view of three arm joints near disk 97 



36. Ophiocten brevispinum. X 5.5. a, from above; b, from below; 



c, side view of three arm joints near disk 99 



37. Ophiocten ooplax. X 5. a, from above; 6, from below; c, side view 



of three arm joints near disk 100 



38. Ophiopenia disacantha. a, young, X 7; b-d, adult, X 5. a, from 



above; 6, from above; c, from below; d, side view of three arm 

 joints near disk 103 



39. Ophiopenia tetracantha. X 8. a, from above; 6, from below; c, side 



view of three arm joints near disk 105 



40. Ophiomusium trychnum. X 3. a, from above; b, from below; 



c, side view of two arm joints near disk 110 



41. Ophiomusium jolliensis. X 2.5. a, from above; 6, from below; 



c, side view of three arm joints near disk 112 



42. Ophiomusium multispinum. X 1.25. a, from above; 6, from below; 



c, side view of three arm joints near disk 113 



43. Ophiopholis mirabilis. X 3.5. Base of one arm and adjoining por- 



tion of disk ; from above 117 



44. Ophiopholis brachyactis. X 4.5. a, from above; 6, from below; 



c, side view of two arm joints near disk 118 



45. Ophiopholis longispina. X 5. a, from above, 6, from below; c, side 



view of two arm joints near disk 120 



46. Ophiopholis bakeri. X 5. a, from above; b, from below; c, side view 



of two arm joints near disk 122 



