INDEX. 



339 



Cohn, Dr., his researches on Protococ- 

 cus, i. 232-236; onVolvox, i. 242,243; on 

 Stephanosphaera, i. 242 note; on Sphae- 

 roplea, i. 255; on Schizomycetes, i. 

 307, 308; on reproduction of Rotifera, 

 ii. 59; his cultivation-solution, i. 307 

 note. 



Coleoptera, integument of. ii. 220; an- 

 tennae of, ii. 232, 233; mouth of, ii. 

 233, 234. 



Collection of Objects, general direc- 

 tions for, i. 219-221. 

 Collins, Mr., his Harley Binocular, i. 

 70-71; his Eye-piece caps, i. 70; his 

 Students' Microscope, i. 59; his Grad- 

 uating Diaphragm, i. 102, 104. 

 Collomia, spiral nbres of, i. 361. 

 Collozoa, ii. 115. 

 Colonial nervous system of Polyzoa, ii. 



160. 

 Colorless corpuscles of Blood, ii. 270, 



271. 



Columella of Mosses, i. 342. 

 Comatula, metamorphosis of, ii. 152- 



156; nervous system of, ii. 285. 

 Compound Microscope, optical princi- 

 ples of, i. 22-25; mechanical construc- 

 tion of, i. 40-42, 51, 52; Educational, 

 i. 52-55; Students', i. 55-67; Second 

 Class, i. 67-73; First class, i. 73-80; 

 for special purposes, i. 80-85. 

 Compressor, i. 126, 127; use of, i. 142. 

 Concave lenses, refraction by, i. 5, 6; 

 use of, in Achromatic combinations, 

 i. 10-15. 



Conceptacles of Marchantia, i. 337. 

 Concretions, calcareous, ii. 323-325. 

 Condensers, Achromatic, i. 102-104: 

 Webster, i. 103; Swift's new combi- 

 nation, i. 113. 



for Opaque objects, ordinarv, 



i. 114; Bull's-eye, i. 115; mode of 

 using, i. 147-150. 



Confervacece, i. 253; self -division of, i. 

 254; zoo-spores of, i. 255; sexual re- 

 production of, i. 254, 255. 

 Conidia of Fungi, i. 322. 

 Coniferce, peculiar woody fibre of, i. 

 364; absence of ducts in, i. 369; struc- 

 ture of stem in, i. 371, 372; pollen- 

 grains of, i. 385 note; fossil, ii. 302. 

 Conjugatece, i. 236, 237. 

 Conjugation, of Paknoglsea, i. 232; of 

 Desmidiaceae, i. 267, 268; of Diato- 

 maceae, i. 281, 282; of Conjugates, i. 

 236, 237; of Monadina, ii. 28-31; of 

 Noctiluca, ii. 37; of Vorticellina, ii. 

 52; see Zygosis. 

 Connective Tissue, ii. 273; corpuscles 



of, ii. 254, 273, 274. 



Contractile vesicle, of Volvox, i. 238; 

 of Actinophrys, ii. 11; of Amoeba, ii. 

 16; of Infusoria, ii. 25, 45. 

 Conversion of Relief, i. 27, 28, 33, 34. 

 Convex lenses, refraction by, i. 3-5; 

 formation of images by, i. 6. 



Copepoda, ii. 208. 



Coquilla-nut, cells of, i. 360. 



Coral, cutting sections of, with animal 



i. 200. 

 Corallines, true, i. 335; Zoophvtic, ii. 



129. 



Cork, i. 373. 



Corn, blights of, i. 323; ii. 193. 

 Corn-grains, husk of, i. 388. 

 Corns, structure of, ii. 276. 

 Cornuspira, ii. 70. 

 Corpuscles of Blood, ii. 267 -271. 

 Correction of Object-glasses, for Sphe- 

 rical Aberration, i. 8, 9, 173; for Chro- 

 matic Aberration, i. 10, 11, 173; for 

 thickness of covering glass, i. 11, 14, 

 135-141. 



Coscinodiscece, i. 289-291. 

 Cosmarium, binary subdivision of, i. 

 265; conjugation of, i. 267; develop- 

 ment of, i. 268. 

 Cover-correction of Objectives, i. 11, 



14, 135-141. 



Covering-glass, i. 176, 177. 

 Crab, shell-structure of, ii. 214, 215; 



metamorphosis of, ii. 216. 

 Crabro, integument of, ii. 220. 

 Crag-Formation, ii. 309. 

 Cricket, gastric teeth of, ii. 237; sounds 



produced by, ii. 242. 

 Crinoidea, skeleton of, ii. 146; meta- 

 morphosis of, ii. 153-156. 

 Cristatella, ii. 162. 

 Cristellaria, ii. 85. 



Crouch, Mr., his Educational Micro- 

 scope, i. 53; his Students' Binocular, 

 i. 65, 66; his stage-centering adjust- 

 ment, i. 80; his adapter for Beck's 

 side-reflector, i. 116. 

 Crusta Petrosa of Teeth, ii. 259. 

 CRUSTACEA, ii. 205-217; lower forms of, 

 ii. 205-206; Entomostracous, ii. 206- 

 211; Suctorial, ii. 212; Cirrhiped, ii. 

 213, 214; Decapod, shell of, ii. 214, 

 215; metamorphosis of, ii. 215, 216. 

 CRYPTOGAMIA, general plan of structure 

 of, i. 331, 351, 352; see Protophyta, 

 Algae, Lichens, Fungi, Hepaticas, 

 Mosses, Ferns, etc. 



Crystallization, Microscopic, ii. 318, 323. 

 Ctenoid scales of Fish, ii. 261, 262. 

 Ctenophora, ii. 137-139. 

 Culture of Protophytic Fungi, i. 123 

 note, i. 307; of Flagellate Infusoria, 

 ii. 31. 

 Curculionidce, scales of, ii. 220, 228; 



elytra of, ii. 128; foot of, ii. 244. 

 Cuticle of Animals, ii. 275-277. 



of Equisetaceae, i. 349; of leaves, 



i. 379. 



Cutis Vera, ii. 274. 

 Cuttle-fish, shell of, ii. 180; chromato- 



phore of, ii. 191. - 

 Cyanthus, seeds of, i. 387. 

 Cyclammina, ii. 82. 

 Cycloclypeus, ii. 70. 



