No. 19.] 



ECHINODERMS OF CONNECTICUT. 



'5' 



reproduction, 128. 

 reproductive organs, 121. 

 respiratory trees, 119. 

 structure, 114. 

 water-vascular system, 119. 



Internal anatomy, Thy one, 116. 



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 inhccrens, 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 qutnquies perforata, 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. 



Ophtophohs aculeata, 14, 67, 68, 78, 



79, 80. 



description, 81. 



geographical distribution, 80. 

 Ophiura brevispina, 13, 14, 71, 78, 



79- 



description, 80. 

 geographical distribution, 79. 

 Ophiura brevispina, var. olivacea, 



. 79- 

 Ophiura olivacea, 79. 



Ophiuroidea, 14. 



arm plates, 70. 



characteristics of, 67. 



development, 77. 



digestive organs, 7s. 



disk, 69. 



fertilization, 77. 



food, 75. 



genital bursae, 76. 



habits, 7z. 



internal structure of arms, 71. 



key to species, 79. 



locomotion, 72,. 



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. 

 Pedicellarias, starfish, 21, 62. 

 Pelmatozoa, 13. 

 Pent am era 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. 



