MUSEUM OF COMPARATIVE ZOOLOGY. 



479 



Obeliscus, II. 331, 335. 



arenosus, II. 331. 



candidus, II. 333. 



crenulatus, II. 331. 



floridanus, II. 331. 



hastatus, II. 332. 



nitidulus, II. 334. 



8ufarcinatus, II. 334. 



tessellatus, II. 331. 



tinctus, II. 334. 



turritus, II. 335. 



nuceus, II 210. 

 Ocinebra, II. 18, 199, 209, 210. 



Cantrainei, II. 208. 



erinacea, II. 210, 214. 



scalaroides, II. 208. 

 Odostomia, II. 334. 



alba, II. 327. 



fulvocincta, II. 336. 



nitidula, II. 334. 



rufa, II. 336. 



unifasciata, II. 338. 

 Oliva, II. 12, 183, PI. XXXIV * 



conoidalis, II. 134. 



litterata, II. 12, 133, PI. XXXIV* 



mutica, II. 133. 



reticularis, II. 12, 133. 



Sayana, II. 133. 

 Olivella, II. 12, 133. 



bullula, II. 12, 135. 



exigua, II. 134. 



floralia, II. 136. 



fuscocincta, II. 12, 134, 135. 



jaspidea, II. 12, 134, 135. 



mutica, II. 12, 133* 



nitidula, II. 134. 



nymplia, II. 136. 

 v. rotunda, II. 12, 134. 



tubutata, II. 12, 136. 



zonalis, II. 133. 

 Omalalaxis, II. 276. 

 Omalaxis, II. 24, 276. 



lirata, II. 278. 



nobilis, II. 24, 276. 



zanclea, II. 276. 

 Omalaxon, II 276. 

 Omaloxon, II. 276. 

 Ombrella, II. 60. 

 Onchidium, II. 437. 

 Oniscia oniscus, II. 231. 

 Oniscidia, II. 20, 231. 



Dennisoni, II. 20, 231. 

 Oocorys, II. 19, 175, 228, 229, 231, 233. 



Oocorys abyasorum, II. 19, 229. 



sulcata, II. 19, 228, 22y, 230. 

 Opalia, II. 300, 308, 324. 



anomala, II. 306. 



borealis, II. 308, 324. 



Gouldii, II. 308. 



longissima, II. 324. 



scaeva, II. 320. 



6ubvaricosa, II. 320. 



Wroblewskyi, II. 308, 324. 

 Operculatum, II. 60. 



bermudense, II. 61. 

 Opsichitonia, II. 36, 414, 416. 

 Orbis, II. 276. 



Pingeli, II. 276. 

 Oscilla, II. 29, 339. 



annulata, II. 339. 



nivea, II. 29, 339, 340. 

 Ostrea fasciata, I. 224. 



hia^ I. 225. 



spi \y ^idea, I. 227. 



tenuis lici.ta, I. 231. 

 Otocheilus mississippiensis, II. 145. 

 Ovula acicularis, II. 234. 



carnea, II. 234. 



carolinensis, II. 236. 



oblonga, II. 235. 



patula, II. 237. 



spelta, II. 235. 

 Ovulactceon, II. 5, 42, 242. 



Meekii, II. 5, 43. 

 Ovulum aciculare, II. 234. 



antillarum, II. 236. 



arcuatum, II. 236. 



gibbosum, II. 237. 



intermedium, II. 235. 



subrostratum, II. 236. 



uniplicatum, II. 235. 

 Oxygyrus, II. 386. 

 Oxystele, II. 378. 



Padollus Pourtalesii, II. 395. 

 Pallium, I. 200. 

 Pandora, I. 197, 311. 



brevifrons, I. 311. 



Bushiana, I. 197, 311, 312. 



carolinensis, I. 311, 312. 



depressa, I. 312. 



floridana, I. 312. 



glacialis, I. 311. 



Gouldiana, I. 197, 312. 



nasuta, I. 312. 



oblonga, I. 311. 



