INDEX. 



The index includes all seientific names of sea-urchins or other animals, occurring in this memoir. The accepted names 

 are in Roman type, excepting new ones, which are in heavy-faced type. All synonyms or exceptional spellings are in italics. 

 Personal names are included in the index only where there is discussion of opinions or other special need of comment. The 

 names of those from whom material was borrowed or to whom I am otherwise under obligations are given in the Introduction, 

 as well as throughout the text but are not included in the index. The page-references in heavy faced type indicate the 

 more important pages on which the case in hand is described. 



abyssicola, Cidaris, 96, 100. 

 acanthifera, Archaeocidaris, 237, 258, 272. 

 Acanthocidaris hastigera, 97. 

 Acrosalenia, 78, 112, 214. 



aspera, 112, 157. 



deeorata, 112, 157. 



hemicidaroides. 111, 112, 113, 157, 164, 174. 



pseudodecorata, 112, 148, 150, 152. 



pustulata, 112, 157, 164, 



spinosa. 111, 112, 157, 174, 175. 



wiltoni. 111, 112, 157, 175, 176. 

 acuaria, Echinocystis, 441. 



Eocidaris, 441. 

 acuaria, Pholidocidaris, 236, 443, 441. 

 acuaria, Prolocidaris, 441. 

 aculeata, Archaeocidaris, 237, 238, 258, 268. 

 aculealus, Archaeocidaris, 268. 

 acutus, Echinus, 118, 139, 160. 

 affinis, Cidaris, 61, 91, 92, 95, 96, 97, 99, 100, 141, 140. 



Echinus, 117, 118, 139, 1.50, 153, 160, 171, 216. 

 Agassiz, Alexander, 10, 11, 18, 28, 31, 32, 33, 34, 52, 56, 57, 

 61, 63, 64, 65, 69, 71, 74, 79. 81, 82, 84, 85, 86, 88, 

 89, 101, 102, 104, 110, 111, 113, 116, 117, 121, 127, 

 128, 167, 168, 170, 174, 175, 176, 177, 185, 187, 189, 

 198, 210, 214, 215, 217, 218, 219, 223, 287, 297, 361, 

 362, 363, 378, 395, 398, 413, 414, 415, 433. 

 Agassiz, Alexander, and Clark, H. L., 28, 62, 76, 82, 97, 



104, lis, 128, 172, 213, 215, 218, 415. 

 Agassiz, Louis, 15, 33, 257, 400. 

 agassizi, Archaeocidaris, 82, 237, 256, 2.58, 266. 



Palaechinus, 305, 457. 

 agassizii, Archaeocidaris, 266. 

 Agelacrintis kaskaskiensis, 458. 

 albida, Trigonoeidaris, 159. 



albus, Strongylocentrotus, 95, 127, 162, 164, 217. 

 Aldrovandus, Ulysses, 10, 244. 

 alexandri, Salmacis, 159. 

 Amblypneustes, 35, 50, 187. 



formosus, 31, 159. 



griseus, 159. 



ovum, 159. 



pallidus, 159. 

 Ammonites, 56, 232. 

 Anadema, 28. 

 Ananehytes, 52, 92, 150. 



ovatus, 112, 148. 



anceps, Archaeocidaris, 449. 



anceps, Echinocrinus, 258, 449, 454, 456. 



anceps, Melonechitius, 454. 



anceps, Protoechinus, 449, 453, 454. 



anglicus, Lovenechinus, 304, 321, 320, 346. 



angulosus, Echinu.s, 119, 151, 1.53, 160, 164. 



annelata, Calmarius, 28. 



annulatus, Miorocyphus, 166. 



annulifera, Phyllacanthus, 101, 102, 150, 152, 153. 



antarcticus, Sterechinus, 120. 



Antedon, .52. 



rosaceus, 52. 

 antillarum, Dermatodiadema, 81, 104, 154. 

 anlillarum, Diadema, 28. 

 Arachnoides, 64, 72, 204, 218. 



placenta, 72. 

 Arbacia, 18, 19, 29, 40, 46, 52, 58, 62, 65, 69, 71, 73, 87, 89, 

 90, 91, 107, 116, 167, 175, 176, 183, 187, 189, 192, 

 194, 198, 210, 215, 217, 241. 



dufresni, 115, 158, 164, 176. 



lixula, 40, 47, 79, 114, 1,58, 104, 187, 192, 194, 195. 



nigra, 95, 114, 115, 148, 150, 1.52, 1.53, 1.58, 164, 170, 

 187, 192, 194, 195. 



punctulata, 35, 37, 39, 41, 42, 44, 45, 46, 48, 50, 88, 

 114, 115, 141, 151, 152, 153, 158, 164, 170, 171, 175, 

 176, 179, 185, 187. 



spatuhgera, 95, 115, 116, 1.58, 104. 



stellata, 114, 158. 

 Arbaciidae, 92, 93, 111, 113, 116, 133, 146, 1.50, 158, 203, 



209, 214, 215, 218. 

 Archaeocidaridae, 70, 89, 206, 209, 223, 236, 254, 284, 302, 



305, 379, 393, 409. 

 Archaeocidaris, 10, IS, 23, 29, 32, 54, 70, 73, 74, 77, 78, 82, 

 85, 178, 181, 182. 206, 209, 212, 223, 224, 236, 237, 

 238, 254, 2.55, 256, 201, 270, 275, 277, 278, 280, 282, 

 283, 289, 307, 361, 363, 395, 407, 413, 414, 450, 456. 



acanthifera, 237, 258, 272. 



aculeata, 237, 238, 258, 268. 



aculealus, 268. 



agassizi, 82, 237, 256, 2.58, 266. 



agassizii, 266. 



anceps, 449. 



henburhensis, 277. S, 



biangulata, 237, 258, 273. 



biangulatus, 273. 



clavata, 2.59, 282. 



(475) 



