550 



Index, 



Melampodium cinereum, 225. 

 Melochia pyramidata, 165. 

 Menobranchus punctatus, 369. 

 Mentzelia oligosperma, 191. 



(Bartonia) nuda, 191. 



Mexican shells, 374. 

 Micrommata pinicola, Hentz, 287. 



subinflata, " 288. 



Mimetus, nov. gen. Hentz, 31. 



interfector, " 32. 



syllepsicus, " 34. 



tuberosus, " 34. 



Mimosa fragrans, Gray, 182. 



Lindheimeri, Gray, 181. 



malacophylla, " 182. 



Mineral from Cherokee County, Georgia, 



Examination of, 123. 

 Mithrax armatus, 456. 

 Modulus dorsuosus, Gould, 383. 

 Morrhua Americana, 267. 

 Muscicapa cariboea, 316. 



Lembeyei, Gundl,, 314. 



— Sagrse, " 313. 



Mygale fluviatilis, Hentz, 286. 

 Myriophyllum heterophyllum, 191. 

 Mytilus glomeratus, Gould, 402. 



Narica ovoidea, Gould, 380. 



Negundo aceroides, 166. 



Nemalite, 36. 



Nemertes, Embryology of, 1. 



Nephrops occidentalis, 495. 



Neuropteris adiantites, Lesq'x, 419. 



Clarksoni, " 417. 



delicatula, " 417. 



dentata, " 418. 



Desorei, " 418. 



fissa, " 417. 



gibbosa, " 418. 



hirsuta, " 417. 



minor, " 418. 



Moorii, " 419. 



speciosa, " 417. 



tenuinervis, " 418. 



undans, " 418. 



Noctua Siju, 318. 



Nceggerathia Bockschiana, Lesq'x, 415. 



minor, " 415. 



obtusa, ' " 415. 



Notes and Observations on the Analysis 

 and Character of the Soils of the Scioto 

 Valley, Ohio, with general considera- 

 tions concerning soil analyses, 324. 



Odostomia Achates, Gould, 385. 



gravida, " 384. 



Odontopteris dubia, Lesq'x, 419. 



squamosa, " 419. 



(Enothera (Megapterium) Missouriensis, 



188. 

 (Enothera (Meriolix) serrulata 6. spinu- 



losa, 189. 

 (Enothera serrulata e. pinifolia, 189. 



speciosa, 189. 



(Lavauxia) triloba, 189. 



Oligocottus maculosus, G., 533. 



Oophora, Hentz, subgenus, 285. 



meridionalis, Hentz, 286. 



Opuntia arborescens, 208. 



Engelmanni (Salm. Mss.), 207. 



frutescens, 208. 



intermedia, 206. 



Lindheimeri, Gray, 207. 



macrorhiza, " 206. 



Orchestia Californiensis, 516. 



Pickeringii, 517. 



Pugettensis, 516. 



Traskiana, 517. 



Oregonia gracilis, 456. 



hirta, 456. 



Organic Eelations of some of the Infuso- 

 ria, 319. 



Ornithological Observations in New 

 Brunswick, by Dr. T. M. Brewer, 297. 



Orpheus Saturninus, 315. 



Os calcis, arrangement of fibres of, 136. 



Osteodesma nitidum, Gould, 390. 



Othonia Picteti, 455. 



Oxalis vespertilionis, 158. 



Ozarkite, Examination of, 44. 



,44; Schorlomite, 45. 



Ozius Verreauxii, 464. 



Pachygrapsus crassipes, 467, 

 Pachyphyllum, nov. gen. Lesq'x, 421. 



affine, " 421. 



fimbriatum, " 421. 



hirsutum, " 421. 



laceratum, " 422. 



lactuca, 422. 



Palaemon brachydactylus, " 502. 



heterochirus, 503. 



Pandalus borealis, 501. 



Danae, Stimpson, 502. 



hypsinotus, 502. 



platyceros, 501. 



pubescentulus, 501. 



Panulirus interruptus, Stimpson, 491. 

 ■ Paracrangon echinatus, 497. 

 Paronychia dichotoma, 152. 



Lindheimeri, Engelm., 152. 



Parthenium hysterophorus, 226, 

 Parthenope punctatissima, 458, 

 Passerina collaris, Vigors, 317. 

 Passiflora atfinis, 233. 



tenuiloba (Engelm. Mss.), 192. 



Pavonia Wrightii, 161. 

 Pecopteris concinna, Lesq'x, 424. 



decurrens, " 424. 



distans, " 423. 



incompleta, " 424. 



notata, " 424. 



pusilla, " 424. 



velutina ; " 423. 



Pectolite and Stellite, analyses of, and 



proposed union of, 40. 

 Pentacta albida, 525. 



— frondosa, 524. 



miniata, 525. 



nigricans, 525. 



