522 



INDEX. 



Macoma — Conthmrd. 



proxima, 95. 

 Mncrocycli.s concava, 406. 

 Mactra lateralis, 77. 



ovalis, 75. 



po!i/rii/in(i, 75. 



poiiderosa, 7.5. 



solidissiina, 73. 

 Mamma iminaculata, 344. 

 Margarita acuminata, 284. 



arctica, 281. 



argentata, 282. 



caniijaimlata, 282. 



cincTfa, 279. 



helic-ina, 281. 



minutis.sima, 280. 



obscura, 283. 



uiidulata, 280. 



varicosa, 285. 

 Margaritaiia arcuata, 174. 



margiiiata, 177. 



iiudulata, 176. 

 Melampus hidentatus, 467. 

 Melantho decisa, 289 

 Melibtea arbnsculu, 236. 

 Mencstho ailmla, 333. 

 Mesodesmu arctita, 80. 



Jauiesii, 81. 

 Modiola discors, 193. 



discrepans, 192. 



ylundn/'i, 194. 



modiolus, 186. 



nexa, 190. 



pi cl inula, 195. 



plicatula, 188. 

 Modiolaria corrugata, 193. 



discors, 192. 



nigra, 190. 

 Molgula arenata, 21. 



producta, 21. 

 MoDtaruta bidinfata, 86. 



clevaia, 86. 

 Mya arenaria, 55. 



trunoatii, 58. 

 Mytilus edulis, 183. 



pellucidus, 184. 



Nassa obsoleta, 362. 



trivittata, 364. 



vibe.x, 365. 

 Natica cana/lculata, 348. 



clausa, 342. 



diijj/iculd, 345. 



Jiitvu, 347. 



heros, 338. 



iiiimdculala, 344. 



])usi/la, 341. 



pusiila, 344. 



tn'sriiiki, 340. 

 Ncrera peliucida, 61. 

 >severita diiplicata, 345. 

 Nioijc /.onata, 258. 



Nucula (see aho Lcda and Yo'dia). 

 dciphinodonta, 153. 

 e.xpansa, 152. 

 inflata, 152. 

 proxima, 150, 

 tenuis, 149. 



O. 



Odostomia bisuturalis, 327. 



deaibata, 327. 



exifjua, 327. 



fusea, 325. 



impressa, 330. 



riiodfsfa, 327. 



producta, 325. 



seminuda, 329. 



tritida, 328. 

 Ommastrephcs Bartramii, 512. 



sagittatus, 510. 

 Osteodesma Iii/alina, 64. 

 Ostrea borealis, 203. 



Virgin iana, 202. 



Pahidina decisa, 289. 

 Pandora trilineata, 62. 

 Panoptta arctica, 51. 

 Patella Candida, 270. 

 Pecten concentricus, 199. 



fuscus, 200. 



irradians, 199. 



Islandicus, 198. 



Ma<;elluniciis, 196. 



tenuicostatus, 196. 

 Pelonaia, 27. 



arcnifcra, 27. 

 Pera peliucida, 17. 

 Petricola dactylus, 92. 



fornicala, 90. 



pboladiformis, 90. 

 PMIine fvrniom, 213. 



iincolata, 214. 



quadrata, 213. 



sinuata, 213. 

 Pholas costata, 36. 



crispata, 39. 



truncnta, 38. 

 Physa anciliaria, 485. 



eloiKjata, 486. 



lieterostropha, 4 83. 

 Pisidium abditum, 113. 



Adiimsii, 110. 



a^quilatci-ale, 1 1 2. 



compressnm, 110, 



dubium, 109. 



ferriigincuni, 113. 



variabilc, 1 15. 



vcntricostim, 116. 

 Placobiancbus catuhis, 256. 



sinipUx, 257. 

 Planorbis aniti(/eriis, 500. 



bicarinatus, 491. 



