564 



BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Stictodiscus nitidus, 150, 181. 



parallelus, 150. 



parallelus gibbosa, 150. 



radfordianus, 150, 166, 167. 



radiatus, 150. 



simplex, 150. 



varians, 150. 

 stockhardtii, Auliscus, 33. 

 Btokesiana, Biddulphia, 46. 

 Stoschia, 150. 



admirabilis, 70, 150, 151. 

 strangulata, Navicula, 100, 123. 

 striata, Cyclotella, 71. 

 6trigosum, Pleurosigma, 139. 

 studeri, Surirella, 154, 158, 182. 

 Stylifer, 291. 

 Stylocidaris, 285, 291, 299. 



annulosa, 294 (fig.), 296, 298 (fig.), 

 308-310, 312. 



bracteata, 258. 



effluens, 285, 290 (fig.), 292, 294, 

 308-310, 312. 



reini, 292, 294 (fig.), 299, 309. 



reini cladothrix, 293, 294 (fig.), 

 296, 309, 310. 



reini rubida, 293, 295, 308, 310. 



tiara, 292. 

 Stylodon dolium, 431. 

 Stylodonta dolium, 431. 

 subacuta, Navicula, 122. 

 subangulatus, Actinoptychus, 15. 

 subatra, Cochlostyla (Calocochlea), 393. 



Cochlostyla roissyana, 389. 



Cochlostyla (Calocochlea) roissy- 

 ana, 387, 389. 



Helicostyla roissyana, 389. 

 subconstricta, Nitzschia marginulata, 



8, 127. 

 subhorizontalis, Obba, 343, 355. 



Obba subhorizontalis, 355. 

 suboscitans, Navicula, 112, 122. 



Navicula oscitans, 112. 

 subpallida, Cochlostyla (Prochilus) cuy- 



oensis, 465, 466. 

 subplanulata, Obba listeri, 345, 353, 354. 

 subrigidum, Pleurosigma, 139. 

 subrufa, Campanularia, 211. 

 subscalaris, Obbina listeri recurvata, 



351, 353. 

 eubsessilis, Achnanthes, 11. 

 subspinosa, Biddulphia reticulata, 45. 

 substauroneiformis, Navicula approxi- 



mata, 7, 94. 

 substauroniformis, Navicula approxi- 



mata, 7. 

 subtilis, Actinocyclus, 13. 



Coscinodiscus, 70. 



Hyalodiscus, 12, 84, 85. 

 subundulata, Navicula (oscitans var.?), 



122. 

 subvelatus, Coscinodiscus, 68. 

 sufflata, Cymatoneis, 72, 178. 

 suffocata, Navicula, 122, 180. 

 sulcata, Cymatoneis, 8, 71, 73, 122. 



Navicula, 122. 

 sulcatum, Plagiogramma, 131. 

 suluense, Pleurosigma, 139, 181. 

 suluensis, Surirella, 158, 182. 



sumbawana, Surirella, 151. 

 superba, Nitzschia, 126, 128. 

 Surirella, 70, 151, 155, 156. 



apiae, 155. 



bertillonii, 151, 181. 



castracanei, 151. 



ceylanensis, 151, 154, 157. 



ceylanensis oblongistriata, 151. 



comis, 152. 



concentrica, 152, 181. 



contigua, 152, 181. 



continuata, 153, 181. 



craticula, 147. 



cuneata, 153. 



cuneatella, 153, 181. 



curvifacies, 154. 



deflexa, 154, 156. 



facilis, 154, 182. 



fastuosa, 7, 153-156, 159. 



fausta, 155, 182. 



fluminensis, 7, 155. 



foliata, 152, 181. 



gemma, 152. 



grandiuscula, 155. 



gravis, 155, 181. 



hybrida, 155. 



imitans, 155, 181. 



incurvata, 154, 156. 



intercedens, 156. 



japonica, 157. 



lata, 156, 157. 



lata macraeana, 157. 



laxa 156. 



macraeana, 154, 156, 157, r 181, 182. 



mexicana, 157. 



mollis, 156, 158. 



multicostata, 151. 



orientalis, 156, 182. 



pacifica, 157. 



patens, 157. 



recedens, 157. 



reniformis, 70, 151, 157. 



schleinitzii, 49, 156, 157. 



significans, 158, 182. 



studeri, 154, 158, 182. 



suluensis, 158, 182. 



sumbawana, 151. 



tahitiana, 159. 



trauensteinii, 154. 



tridens, 153. 

 sutum, Rhabdonema, 141, 181. 

 sylvanoides, Cochlostyla, 456, 459. 



Cochlostyla virgata, 457. 



Helicostyla virgata, 457. 

 sylvanus, Bulimus, 456, 487. 



Bulinus, 455, 458. 



Cochlostyla (Prochilus), 460. 

 symmetricus, Coscinodiscus, 70. 

 Syndendrium diadema, 159. 

 Synedra, 140, 144, 159. 



crystallina, 159. 



cuneata, 159. 



formosa, 160. 



fulgens, 159. 



pulcherrima, 159, 182. 



robusta, 160. 



undulata, 160. 

 Synthecidae, 199, 221. 



