Navicula libellus, i. 218 

 macula, i. 216 



rhombica, i. 21S 



Trochus, i. 220 

 Nebalia bipes, ii. 23 

 Nebessa chalyboeata, i. 376 

 Neckera complanata, i. 162 ; v. 285 ' 



crispa, i. 162, v. 285 



Philippeana, i. 38, 76 



pumila, i. 38, 162 ; v. 285 

 Nedroma, i. 353 



ferruginea, i. 353 

 Nematus abdominalis, ii. 291; iii. 89, 

 252 



abietum, ii. 311 



acuminatus, ii. 291 



albipennis, ii. 262 



alnivorus, ii 291 



antennatus, iii. 250, 252 



apicalis, iii. 2 



appendicular, iii. 88, 249, 252 



arcticus, iii. 320 



baccarum, iii. 5 



betulae, iii. 249 



bilineatus, iii 83, 252 



brachyacanthus, ii. 312 



breadalbanensis, v. 181 



cadderensis, iii. 89 



canaliculars, iii. 249, 252 



capreae, iii. 88, 252 



carinatus, ii. 311 



cinereae, ii. 292, 295 ; iii. 89 



clibrichellus, iii. 250, 252 



conductus, ii. 291 ; iii. 88 



consobrinus, ii. 336 



crassiventris, iii 320 



crassulus, ii. 313 ; iii. 89, 252 



crassus, ii. 312; iii. 88 



croceus, ii. 292 



Degeeri, ii. 291 



dimidiatus, ii. 311 



dorsatus, ii. 292 ; iii. 2, 88, 249, 252 



dubius, iii 320 



fallax, iii. 249, 252 



femoralis, ii. 295 



flavipennb, iii. 5 



fulvipes, iii. 88 



furvescens, ii. 308 



gallicola iii. 89 ; iv. io'i, 225 



herbacea, ii. 306 ; iii 252 



histrio, ii. 291 



hortensis, iii. 37 



humeralis, ii. 304 



hyperboreus, ii. 262 



imperfectus, iii. 88 



interstitialis, ii. 260 



Kirbyi, ii. 291 



lativentris, ii. 312 



leucostigmus, ii. 308 



longiserra, iii. 104, 202 



sx. x iv 



Nematus luteus, ii. 291 ; iii. 88, 252 

 var. trimaculatus, ii. 259 

 Marshalli, ii. 262 

 miliaris, ii. 292 : iii. 89, 252 



myosotidis, iii. 89, 252 



obductus, ii. 291 ; iii. SS, 252 



ochropus, iv. 10S 



pallescens, ii. 292 ; iii. 105 



palliatus, iv. 225 



pallidiventris, ii. 259 



pallipes, ii. 311 



papillosus, ii. 292 ; iii. 89 



pedunculi, iii. 252, 320 



placidus, iii. 320 



puncticeps, ii. 262 



punctulatus, iii. 88 252 



quercus, iii. 88 



ribesii, ii. 292 ; iii. 89, 252 



ruficornis, ii. 262 : iii. 252 

 var. fraxini, ii. 291 



rumicis, iii. 88, 202, 251, 252 



saliceti, ii. 292, 295 



septentrionalis, ii 291 



so lea, ii. 310 



stilatus, ii. 291 



striatus, ii. 304 



strongylogaster, iii. 320 



testaceipes, ii. 291 



turgidus, iii. 320 



Vallisnieri, ii. 292, 295 



varus, ii. 291 



vesicator, iii. 104 



viminalis, iii. 89 ; iv. 225 



Westermanni, iii. 104 



xanthogaster, iii. 202 



Zetterstedti, ii. 262 

 Neottia nidus-avis, iv. 210; v. 81, 250 

 Nephrodium dilatatum, v. 281 



Filix-mas, v. 281 



Oreopteris, v. 160, 281 

 Nereis bilineata, i. 1 



Dumerilii, ii. 48 

 Neriene rufipes, iv. 79 

 Neritina Jordani, i. 384 



Michonii, i. 383 

 Nesticus cellulanus, iii. 171 

 Nettium crecca, iv. 6S, 181, 254, 321 ; 



v. 62, 151 

 Neuropteris gigantea, iv. 1 9 

 Neuroterus lenticularis, iii. 252 

 Nicothoe astaci, i. 125 

 Niptus hololeucus, ii. 302 

 Niso Smithiana, v. 240 

 Nitella opaca, v. 162 

 Nitzschia curvula, i. 217 



dubia, i. 217 



incrustans, i. 218 



lanceolata, i. 218 



linearis, i. 217 



minutissima, L. 217 



