SI 



EXPLANATION OF PLATES XII TO XX. 

 PECT E N. 



Fig. 1, 2. P. gibbus, Sp. 22. 

 3, 4. P. eorallinoides, 59. 

 5, 6. P. unicolor, 44. 

 7, 8. P. Solaris, 28. 

 9, 10. P. bifrons, 26. 

 11. P. superbus, 52. 

 12, 13. P. tranquebaricus,89. 

 14, 15. P. clavatus, 47. 



16. P. danicus, 48. 



17. P. gibbus, 22. 



18, 19. P. ventricosus, 19. 

 20, 21. P. lati-auritus, 36. 



22. P. Solaris, 28. 



23. P. circularis, 18. 

 24, 25. P. pyxidatus, 13. 



26. P. ventricosus, 19. 

 27, 28, 29. P. tumidus, 37. 



30. P. Rastellum, 50. 



31. P. velutinus, 55. 

 32, 33. P. imbricatus, 67. 



34. P. rubromaculatus, 

 68. 



35, 36. P. sulcicostatus, 6. 



37. P. sub-plicatus, 57. 

 38, 39. P. noduliferus, 56. 



40. P. Greenlandicus,35. 

 41, 42, 43. P. flagellatus, 40. 

 44, 45. P. corneus, 80. 



46. P. distans, 49. 



47. P. aculeatus, 78. 

 48, 49, 50. P. squamosus, 73. 



51, 52. P. irregularis, 75. 

 53, 54. P. proteus, 42. 



55. P. Singaporinus, 90. 



56. P. serratus, 74. 

 57, 58. P. squamatus, 76. 



Fig. 59. P. sanguinolenlus, 

 86. 



60. P. Patagonicus, 27- 



61. P. lividus, 72. 

 62, 63, 64, 65. P. pusio, 83. 



66, 67. P. liyalinus, 39. 

 68. P. Madreporaruni, 

 70. 



69, 70. P. albolineatus, 85. 



71. P. Singaporinus, 90. 

 72, 73. P. sub-plicatus, 57. 

 74, 75. P. obsoletus, 81. 



76. P. gibbus, 22. 

 77? 78. P. ornatus, 84. 



79. P. obsoletus, 81. 



80. P. ornatus, 84. 



81. P. sub-plicatus, 57. 

 82, 83, 84. P. proteus, 42. 



85. P. nucleus, 17- 

 86, 87. P. vitreus? 79. 



88. P. squamosus, 73. 



89. P. lividus, 72. 



90. P. Tegula, 71. 



91. P. lividus, 72. 

 92, 93. P. squamosus, 73. 



94. P. noduliferus, 56. 

 95, 96. P. Tigris, 67. 



97. P. sub-nodosus, 61. 

 98, 99, 100. P. maximus, 1. 

 101. P. laqueatus, 4. 

 102, 103, 104. P. medius, 5. 

 105, 106. P. dentatus, 11. 

 107, 108. P. Jacobseus, 3. 

 109, 110. P. Japonicus, 31. 



111. P. crassi-costatus,92. 



112. P. subnodosus, 61. 



K 



