TABLE OF CONTENTS. x [ 



INVERTEBRATES IN GENERAL. 



The King-crab not a Crustacean, 268 ; Parasites of Fish, 272 ; Phosphores- 

 cence of Marine Animals, 289, 290; Microscopic Forms in Chicago Water, 392. 



ARTICULATES. 



Insects : Genesis of Insects, 265 ; Cry of the Death's-head Moth, 266 ; new 

 Butterflies, 266 ; Uremia leilus, 167 ; Edwards on North American Butter- 

 flies, 267, 311 ; Parasite of the Beaver, 300 ; Bark-louse of the Apple-tree, 

 302 ; Habit of Bees, 304. Crustaceans : Tomocai'is Peircei (Agassiz), 216; 

 Smith on, 216 ; have Trilobites Legs ? 268 ; Early Stages of American Lob- 

 ster, 269 ; Close Time for Lobsters, 305. Entozoa : Embryology of Gordius, 

 315; Filaria in the Brain of Anhinga, 324; Worms in Trout, 275; Parasites 

 and Commensals of Fish, 272. Rotifer : Pedalion mira, 325. 



MOLLUSKS. 



Gill's Classification, 269 ; Embryology of certain Forms, 271 ; Protective 

 Coloration, 271 ; American Oysters in England, 270 ; Green Color of, 432 ; 

 American Fisheries, 432, 433 ; Origin of Pearls, 270 ; Achatinellas of the 

 Sandwich Islands, 271; Position of the Brachiopods, 315. 



RADIATES. 



Preservation of Jelly-fish, 290 ; Bate of Growth of Coral, 321. 



H. BOTANY 339 



Floras : of the Canaries, 341 ; Ancient and Modern North American, 352. 

 Seasons : Variation of Seasons, 342. Vegetable Physiology : Preferen- 

 ces of Climbing Plants, 342 ; Influence of Light on Plants, 352 ; Effect of 

 Red Rays on the Assimilation of Green Plants, 346 ; Influence of Heat on 

 Plants, 343 ; Effect of Germination on the Fat in Seeds, 345 ; Absorption of 

 Moisture by Leaves, 346 ; Absorption of Nitrogen by Plants, 345. Compo- 

 sition : Change in the Composition of Herbaceous Vegetables, 344 ; Differ- 

 ence in the Ash of Grape and other Fruit Wines, 346 ; Mineral Matter in 

 Plants, 351. Medicinal and Useful Plants: Cundurango, 341, 355; Co- 

 lombian Guaco, 340 ; Esparto Grass, 362 ; Ink Plant, 352 ; Uses of the 

 Water Pest, 354 : Prickly Comfrey, 364. Other Species : Parasite of the 

 Spruce, 343 ; Alga in a Dicotyledonous Plant, 342 ; Algae of Rhode Island, 

 342 ; Characters of Bacteria, 347, 348 ; Ferment Fungi, 350 ; Nature of 

 Cryptococcus, 350. 



General : New Journals, 339 ; Hooker's Flora of British India, 340 ; Ad- 

 ditions to the Collection of the British Museum, 339 ; Visitors to Kew Gar- 

 dens in 1871, 340 ; Death of A. J. Spring, 353 ; new Species of North Amer- 

 ican Plants, 355. 



I. AGRICULTURE AND RURAL ECONOMY 357 



GENERAL. 



Lawes's Experimental Farm, 357 ; Massachusetts Entomological Report for 

 1871,377; Missouri Entomological Report, 378 ; N. Y. State Agricultural So- 

 ciety, 373 ; Destroying Mould in Cellars, 360 ; Rusting of Garden-tools, 373. 

 THE SOIL. 



Source of its Nitrogen, 367 ; Function of Potassium in, 367 ; Absorbent 

 Power of, 376 ; Action of Soils in Absorbing Gases, 375. 



