INDEX 



Pond-lily, small yellow, 93; 

 white, 58, 93-95, 258; yel- 

 low, 91-93, 258, 278-279 



"Pond-scum", 50 



Pond-skaters, 91 



Ponds, animal life of, 15, 16, 

 17; balance of life in, 17, 18; 

 collecting locality, 30-31, 

 32, 34, 36; equable temper- 

 ature of, 8; definition of, 



11, 12; kinds, 11-12; lifein, 



12, 13; permanent, 12; 

 plants in, 13, 16; shallow, 

 16; transient, 11 



Pondweeds, 15, 16, 31, 48, 58, 

 73-75, 100, 303; brown- 

 leaf, 75; choke, 80; crisp- 

 leaved, 75; ruffle-leaf, 75; 

 sago, 75 



Pontederia cordata, 85-88 



PontederiacecE (pickerel- 

 weeds) 85-89 



Potassium cyanide killing 

 bottles, 28, 29, 40 



Potomanthus, 207 



Pools, clear, collecting in, 34 



Porifera (sponges), 104-111 



Potamogeton, 58, 272, 279, 

 323; crispus, 75; illinoicn- 

 sis, 216; natans, 73, 74; pec- 

 tlnatus, 75 



Potato "bugs", 262 



Pratt, H. S., Ill 



Prawns, 172 



Preser\^ation, of specimens, 



40-45 

 Prosimuhuni hirtipes*2g6 



Protozoans, 36, 46-54, 55-57, 

 100, 103, 136, 162; in plank- 

 ton, 16; in springs, 34 



Psephenidce (water-pennies) , 

 262, 263, 265, 277-278 



Psephenus, 263; lecontei, 278 



Pseudacris triseriata, 378 



Pseiidosiiccinea columella, see 

 Lymncsa columella 



Pseiidotriton ruber, 363-365 



Psilotreta, 255 



Pteronarcidce, 195 



Pteronarcys, 103, 194; dor- 

 safa, 193, 194 



PtychopteridcB, 282, 287 



Pulex aquaticus aborescens, 



164 

 Pidmonata, 307 

 "Pumpkin seeds", 341-342 

 Punkies, 282, 290, 292-293 

 Pupa, delinition, 187, 188 



Radicula Nasturtium-aquali- 



cum, 95-96 

 Ramphocoi'ixa acuminata, 226 

 Rana catesbiana, 387-388 ; 



clamitans, 385-386; palus- 



tris, 381-382; pipiens, 379- 



381; sylvatica, 382-384 

 Ranatra, 22,6; fusca, 236 

 Ranidce (frogs), 379-381 

 Rapids, collecting in, 34; life 



in, 22-25 

 Reading glass, for use in ac- 



quarium study, 40 

 "Red eft", 353-357 

 "Red lizard", 353-357 

 Redfins, 335-33^ 

 Reeds, 13, 20, 30 

 "Reindeer moss", 61 

 Relaxing jar, 43 

 Reproductive capacity, of in- 

 sects, 17, 18 

 Reservoirs, bryozoans in, 133, 



135, 138; sponges in, 107 

 Rhabdocxlida, 122, 124. 

 Rhagovelia, 228, 229; obesa, 



229-230 

 Rhamphidia, 289 

 Rhiniclhys atronasus, 334-335 

 RhodophycecB, 47 

 RhyacophUa, 250 

 RhyacophilidcB, 249-250 

 Rhyacophilincc, 249-250 

 RhyncobdellcB, 153 

 Riccia, 15, 31; fluitans, 60; 



natans, 60 

 Riffle-beetles, 262, 263, 265, 



277-278 

 Riffles, collecting in, 33-34 

 "Riker boxes", 42, 44-45 

 Rividaria, 48 

 Ronald, 199 

 Rose "bugs", 262 

 Rotifers, 52, 100, 103, 127- 



130, 294; definition, 127; 



habits, 129-130; in springs, 



444 



