Paleontological Index 



555 



Merostomata, 23. 



Mesomphalus, 522. 



Mesomphalus hartley!, l.'Jl, 138, 522, .'2:t. 



submarginata, 131, 523. 

 Metaplasia, 422. 

 Metaplasia lontiformis, 184. 



plicata, 402, 415. 



pyxidata, 129, 184, 185, 18G, 422. 

 Meustella princops, 443, 448. 

 Michelina lenticularis, 218. 

 Mllliporoida?, 221. 

 ModiolopsidiP, 462. 

 Mollusca, 129, 1.30, 450. 

 Molluscoidea, 125, 126, 259. 

 Monotrypa, 378. 

 Monotrypa corrugata, 209. 



sphaerica, 125, 169, 278. 



tabulata, 125, 169, 173, 278. 

 Monticulipora monticula, 270. 



petropolitana, 195. 



winteri, 270. 

 Murchisonia minuta, 106. 



sp., 136. 

 Mytilacea, 462. 

 Mytilarca, 453. 

 Mytilarca cordiformis, 129, 452. 



marylandica, 129, 453. 



(Plethomytilis) rowei, 129, 453. 



Nautiloidea, 487. 

 Nootremata, 390. 

 Nucleospira, 430. 

 Nucleospira elegans, 129, 180, 431, 432. 



sp., 134. 



swartzi, 129, 136, 139, 142, 147, 4.33. 



ventricosa, 129, 169, 172, 174, 178. 

 180, 430, 431. 



Octonaria, 537. 



Octonaria angulata, 131, 146, 537. 



ina?qualis, 131, 146, 538. 



n. sp., 104. 



simplex, 132, 538. 

 noci'nitidiT>. 488. 

 Opisthobranchiata, 484. 

 Opisthoparia, 489. 

 Orbiculoidea, 290, 296. 

 Orbiculoidea ampla, 126, 183, 185. 186. 

 290, 291. 



jervensis, 291. 



roederi, 126, 290. 



schucherti, 126, 138, 293. 



sp., 126, 173, 392. 

 Oriskania, 389. 

 Oriskania lucerna, 128, 184, 390. 



iiavicclla, 390. 



sinuata, 390. 



Orthacca, 297. 

 (Jrthidae, 297. 

 Orthis, 302, 328. 

 Oithis assimllis, 304. 



bicostatus, 420. 



concinna, 301. 



fumberlandia, 333. 



IDalmanella] elegantula, 302. 



doformis, 331. 



eminens, 299. 



hipparionyx, 333. 



multistriata, 307. 



musculosa, 305. 



oblata, 302, 303. 



oblata var. emarginata. 302. 



porelegans, 299. 



umbonata, 421. 

 Orthoceras, 487. 

 Orthoceras cf. rigidium, 149. 



jongicameratum, 130, 487. 



inultiannulatum, 157. 



rigidum, 102, 130. 488. 



scbuchei-ti, 1.30, 487. 



sp., 150, 155, 165. 



teiiuiannulatura, 488. 

 Orthoceratidse, 487. 

 (Irthochoanites, 487. 

 Orthonychia, 469. 

 Orthonychia tortuosa, 130, 469. 

 Orthopora, 286. 

 Orthopora, n. sp., 103. 



ovatipora, 126, 388. 



regularis, 126, 173, 175, 287. 



rhombifera, 126, 138, 139, 142, 144, 

 145, 146, 147, 150, 151, 154, 156, 

 173, 175, 286. 

 Orthostropbia, 297. 

 (ii-tbostropia strophomenoides, 126. 169, 



174. 297. 

 Orthotctos, 327. 

 Orthothetes artostriata, 329. 



becraftensis, 329. 



chemungensis, 330. 



deckensis, 329. 



deformis, 331. 



deformls var. sinuatus, 331. 



woolworthanus, 328. 

 Ostracoda, 131, 181, 513. 



Pachydomella, 542. 

 Pachydomella longula, 132, 542. 



tumida, 542. 

 Palipoconeha, 450. 

 Palaeopinna lata, 129. 454. 

 Paleopinna, 454. 

 Parazyga, 429. 

 Parazyga deweyi, 168, 429. 

 Pectinida;, 460. 

 Peleeypoda, 129, 171, 450. 



