No. 19.] 



ECHINODERMS OF CONNECTICUT. 



151 



reproduction, 128. 

 reproductive organs, 121. 

 respiratory trees, 119. 

 structure, 114. 

 water-vascular system, up. 



Internal anatomy. Thy one, ii6. 



sea-urchin, 89. 

 Internal structure of arms, ophi- 



uran, 71. 

 Internal structure, starfish, 25. 



Key-hole urchin, 112. 



internal anatomy, 95. 

 Key to species, Asteroidea, 58. 



Echinoidea, 106. 



Holothuroidea, 129. 



Ophiuroidea, 79. 



Larvae, methods of rearing, 128. 

 Leptosynapta girardii, 138. 

 Leptosynapta inharens, 138, 143. 

 Leptosynapta roseola, 141, 143. 

 Literature on Echinoderms, 144. 

 Locomotion, disk-urchin, 94, 97. 



echinoid, 97. 



ophiuran, 73. 



starfish, 19. 

 Losses caused by starfish, 34, 39. 



Madreporic plate, echinoid, 88. 



holothurian, 120. 



ophiuran, 70. 



starfish, 20. 

 Mellita pentapora, 14, 16, 85, 95, 

 105, 106, 112. 



description, 112. 



geographical distribution, 113. 

 Mellita qumquiesperforata, 112. 

 Mellita testudinata, 112. 

 Metamorphosis, starfish, 54. 



key-hole urchin, 105. 



sea-urchin, 103. 

 Migration, starfish, 43. 

 Mouth, disk-urchin, 95. 



sea-urchin, 86. 



ophiuran, 68. 



starfish, 22. 

 Musculature, holothurian, 121. 

 Mutilation, starfish, 46, 47. 



Natural enemies, echinoid, 99. 



starfish, 32. 

 Nervous system, holothurian, 121. 



sea-urchin, 91. 



starfish, 27. 

 Northern starfish, 58, 61. 



development, 58. 



OphiophoKs aculeata, 14, 67, 68, 78, 



79, 80. 



description, 81. 



geographical distribution, 80. 

 Ophiura brevispina, 13, 14, 71, 78, 



79- 



description, 80. 

 §;eographical distribution, 79. 

 Ophiura brevispina, var. olivacea, 



79- 

 Ophiura olivacea, 79. 

 Ophiuroidea, 14. 



arm plates, 70. 



characteristics of, 67. 



development, 77. 



digestive organs, 72. 



disk, 69. 



fertilization, 77. 



food, 75. 



genital bursae, 76. 



habits, 73. 



internal structure of arms, 71. 



key to species, 79. 



locomotion, 73. 



methods of feeding, 76. 



regeneration, 75. 



reproduction, 76. 



structure, 68. 



tube-feet, 71. 



viscera, 73. 

 Ossicles, starfish, 24. 

 Oysters, damage caused by starfish, 

 33. 57- 



Paractinopoda, 129. 

 Pedicel] arias, starfish, 21, 62. 

 Pelmatozoa, 13. 

 Pentamera pulcherrima, 130. 

 Pink Synapta, 141. 

 Pluteus, echinoid, 102, 103. 



ophiuran, 78. 

 Purple sea-urchin, 107. 

 Rate of growth, starfish, 40. 

 Regeneration, holothurians, 126. 



ophiurans, 75. 



starfish, 45. 



Synapta, 127. 



Regularia, 91, 92, 106. 

 Reproduction, echinoid, 100. 



holothurians, 128. 



ophiuran, 76. 



starfish, 48. 

 Reproductive organs, holothurian, 

 121. 



sea-urchin, 91. 



starfish, 28. 

 Respiratory trees, holothurian, 119. 



