PALEONTOLOGICAL INDEX 



Figures in bold face Indicate principal discussion. 



Acervularia communis, 205. 



incqualis, 205. 

 Acidaspis tuberculata, 77. 

 Actinoptcria, 455. 



Actinopterla communis, 129, 147, 157, 

 160, 170, 173, 175, 176, 455, 456. 



communis var, 129, 456. 



vecticosta, 458. 



reticulata, 129, 459. 



sp., 163. 



textilis, 129, 456. 



textllls var. arenaria, 129, 457. 



virginica, 120, 458. 

 Actinostroma. 226. 

 Aeclimina, 521. 

 Aeclimina cuspidata, 131, 521. 

 AgassizocrinidJe, 256. 

 Ambocoelia, 421. 



Ambocoelia umbonata, 128, 188, 421. 

 Ambonychiid.-c. 452. 

 Amphexopora petasiformis, 270. 

 Amphicfplia, 453. 

 AmphiccTplia costata, 454. 



ulrichi 129, 453. 

 Anatina sinuata, 464. 

 Annelida, 258. 

 .\nomaloc,vstid£e, 228. 

 Anomalocystites, 228. 

 .'Inomalocystites disparilis, 124, 184, 328. 

 Anoplla, 339. 

 Anoplia lielderberglae, 127, 339, 340. 



nucleata. 127. 181, 182, 1.83, 185, 

 186, 339, 340. 

 Anoplotheca, 433. 

 .\noplotheca Camilla, 433. 



concava, 118. 129. 16.3, 168, 169, 

 173. 174. 175, 177, 179. 433, 434, 

 435, 436. 



concava var. tonolownypnsis, 129, 

 434. 



dichotoma, 129, 186, 433, 435. 



oquistriata. 129. 433, 435. 



fimbriata, 183. 184, 186. 



flabellites, 179. 181, 182, 183, 184, 

 185, 186, 435, 437, 438. 



lepida, 433. 



(Leptocflelia) fimbriata, 129, 436. 



(Leptocnplia) flabellites, 129, 438. 

 Anthozoa. 124, 198. 

 .\parcbites, 515. 



Aparchites gordoni, 131, 515. 

 Apiocystinae, 229. 

 Apiocystites gebhardii, 230. 

 Arthropoda, 23, 130, 131, 489. 

 Asaphus laticostatus, 508. 



micrucus, 507. 



pleuroptyx, 510. 

 Ascodictyonidse, 260. 

 Ascodictyon, 260. 

 Ascodictyon siluriense, 125, 2(>o. 



stellatum var. siluriense, 260. 

 Asphidobranchia, 465. 

 Asteroccrum pyriforme, 211. 

 Astylospongia inornata. 195. 

 Athyridae, 424. 

 Atrypa, 392. 

 Atrypa biconvexa, 128, 136, 393. 



flaliellites, 438. 



galeata, 342, 343. 



medialis, 374. 



nucleolata, 441. 



peculiaris, 372. 



pleiopleura, 360. 



reticularis, 100, 119, 128, 135, 

 137, 139, 140, 142, 143, 144. 

 146. 147, 148, 150, 151. 155. 

 157, 159, 162, 163, 164. 165, 

 167, 170. 172. 173, 176, 392. 



nigosa. 352, 394. 



singularia. 371. 



sp.. 165, 353. 

 Atrypidee, 392. 

 Atrypina. 394. 



Atrypina imbricata, 128, 179, 394. 

 Aulopora; 219, 220. 

 Aulopora schohariae, 100, 124, 155, 

 219. 



scliucherti. 100, 124. 136. 139. 

 151, 155, 180, 219. 



sp., 147, 151. 



tubula, 21!^. 

 Auloporid.-p, 219. 

 Avicula. 460. 

 Avicula communis, 455. 



gebbardi, 190. 



recticosta, 129, 183, 460. 



securiformis. 450. 



tenuilamellata. 461. 



textilis, 183, 456. 



textilis arenaria, 190. 



textilis var. arenaria, 183, 457. 



