XIV LIST OF ILLUSTRATIONS 



FIGURE PAGE 



30. Echinus lividus . . . . . .75 



31. Spatangus purpureus . . . . .76 



32. Test of Spatangus . . . . .77 



33. Cucumaria and Synapta . . . . .79 



34. Plates of Cucumaria and Synapta . . .80 



35. Sabella pavonina and S. arenilega and their Tubes . 85 



36. Types of Polychsete Worms . . . .87 



37. Aphrodita aculeata . . . . .89 



38. Terebella and its Tube . . . . .99 



39. Amphitrite Edwardsii . . . . .101 



40. Chcetopterus variopedatus .... 103 



41. Membranipora membranacea . . . .106 



42. Portion of Membranipora, enlarged . . . 107 



43. Lepralia foliacea . . . . .108 



44. Lepas anatifera . . -. . . .111 



45. Development of Lepas . . . . .114 



46. Acorn Barnacles . . . . .116 



47. Isopod Crustaceans attacking Fish . . .122 



48. Types of Isopoda and Amphipoda . . . 124 



49. Common Lobster . . . . .126 



50. The " Burrowing Prawns " . . . .129 



51. Alpheus ruber and Nika edulis . . . .131 



52. The Prawns ...... 133 



53. Common Shrimp, and Variety mimicking Surroundings . 137 



54. The Crawfish. Palinurus . . . .138 



55. Larva of Crawfish . . . . .139 



56. Scyllarus arctus . . . . . .141 



57. The Mantis Shrimp (Squilla) .... 142 



58. Common Hermit Crab . . . . .145 



59. Galathea strigosa . . . . .148 



60. Porcellano, platycheles . . . . .149 



61. The Great Stone Crab . . . . .151 



62. Dromia vulgaris . . . . . .152 



63. Development of Crab . . . . .155 



64. Common Shore Crab . . . . .156 



65. The Edible Crab ..... 158 

 66 Pilumnus hirtellus . . . . .159 

 67. Xantho florida, male . . . 161 



