306 



INDEX. 



Poljzoa, habits, 222. 



key to genera of, 228. 



jelly-like loricse, 224. 



literature, 228. 



lophophore, 225. 



mouth, 225, 226. 



reproduction, 225. 



retraction and expansion, 227. 



stomach, 227. 



tentacles, 226. 



to examine, 228. 



tubular loricae of, 226- 

 Poppy, seeds of, 287. 

 Porlulaca, seeds of, 287. 



sphaeraphides, 289. 

 Potash crystals, chlorate of, 291. 

 Primrose,"289. 



Prisms, long crystal, 290. 



short crystal, 290. 

 Pristina, 164, 187, 188. 

 Probosces of insects, 280. 

 Proserpinaca, 52. 

 Pseudopodia of Bhizopods, 111. 



pin-like of Vampyrella, 118. 

 Plerodina, 208, 217. 

 Pyrogallic acid crystals, 291. 



R. 

 Eabbit's foot (Tn folium arvense\ 



290. 



Ranunculus aquatilis, 49. 

 Raphides, 289. 



Reflector for drawing the object, 42, 

 Rhizopods, 61,62, 111. 



books relating to the, x., 130. 



favorite haunts of, 114. 



food of and its capture by, 113. 



habitats, 114. 



illoricate, 112. 



key to genera of, 115. 



loricate, 112. 



permanently adherent, 1 30. 



pseudopodia, 111. 



structure, 111, 113. 



to gather, 114. 

 Riccia fluitcms, 62. 

 Richwced, 290. 

 Rotifers, 200. 



eggs, 205. 



eyes, 200. 



foot, 202. 



Rotifers, habitats, 206. 



key to genera of, 207. 



literature, 207. 



loricse, 201. 



male, 206. 



mastax, 204, 206. 



moutli, 203. 



nibbling, 204. 



reproduction, 205. 



tail of, 202. 



Rotifer vidgaris, 202, 208, 216. 

 Rubber cement, Brown's, S3. 



S. 



S;ilt, crystals of, 291. 

 Saponaria officinalis, sphaeraphides 



in, 289. 

 Scales, fish, 282. 



from insects' wings, 278. 



to mount, 279. 

 Scapholeberis, 246, 248. 

 Scenedesmus, 71, 100. 



guadricauda, 100. 



Science News and Boston Journal of 



Chemistry, 36. 

 Screw, the Society, 12. 

 Sea-mosses, Hervey on the, x. 

 Seeds of wild plants, 27, 287. 

 Shellac cement, 30. 

 Sida, 246, 252. 

 Slide, a simple life, 38, 39. 

 Slips and slides, distinction between, 



25. 



Slips, proper size of, 27. 

 Snails, lingual ribbon of, 283. 

 Spatterdock (Nuphar), 51. 

 Sphaeraphides, 286, 289. 

 Sphcerozosma, 74, 76. 



pulchra, 76. 

 Sphagnum, 60, 1 64. 

 Spiders, eyes of, 280. 



feet of, 279. 

 Spiderwort (Tradescantid), 289. 

 Spiroffyra,103, 106. 



as food of Difflugia, 124. 



as food of Vampyrella, 119. 

 Spirotcema, 75, 87. 



condensata, 87. 

 Spores of Eqnisetum, 288. 

 Spring-clips, 22. 

 Squares, thin glass, 29. 



