548 



BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Euodia arcuata, 80. 



janischii, 77. 

 Eupanthalis, 186. 



evanida, 186, 187 (fig.). 

 Euphyllodium spathulatum, 140. 

 evanida, Eupanthalis, 186, 187 (fig.), 

 exacta, Biddulphia, 38, 177. 

 exarata, Mastogloia, 90. 

 excavata, Navicula, 8, 102, 113, 115, 



179. 

 excentricus, Coscinodiscus, 66, 67. 

 exempta, Navicula, 113. 

 exemptum, Pleurosigma, 134, 137, 181. 

 exigua, Achnanthes, 12. 

 exiguus, Coscinodiscus, 7, 66. 

 eximia, Navicula, 102. 

 eximius, Campylodiscus, 51. 

 expedita, Biddulphia, 36, 39. 



Navicula, 102. 

 expressum, Triceratium, 42. 

 exsecta, Amphora, 8, 22. 

 facilis, Surirella, 154, 182. 

 fallax, Mastogloia, 87. 

 falx, Pleurosigma, 134, 181. 

 fasciata, Schizocidaris, 243, 276, 280, 

 281 (fig.), 308, 310, 311. 



Stegopoma, 206. 

 fastidiosa, Cochlostyla (Cochlodryas), 



427. 

 fastigiata, Calycella, 205. 



Campanularia, 205. 



Stegopoma, 205. 

 fastuosa, Surirella, 7, 153-156, 159. 

 fausta, Surirella, 155, 182. 

 favus, Biddulphia, 37-39, 46, 165. 

 fictilis, Cochlostyla, 468. 



Cochlostyla (Prochilus), 466, 467. 



Cochlostyla (Prochilus) fictilis, 467. 

 fimbriata, Biddulphia, 39. 

 fimbriatum, Triceratium, 47. 

 flabellata, Plumularia, 199, 223, 241. 

 flabellum, Synthecium, 221. 

 flahaulti, Achnanthes, 11. 

 flava, Halicornaria, 238. 

 flavipellis, Helicostyla (Chrysallis) min- 



doroensis, 497. 

 flexa, Amphora, 22, 176. 

 flexuosa, Grammatophora, 79. 

 floreatus, Chrysanthemodiscus, 58, 178. 

 florida, Bulimus, 411. 



Cochlostyla, 411, 416. 



Cochlostyla (Cochlodryas', 410, 

 411, 418. 



Cochlostyla (Cochlodryas) florida, 

 411, 418. 



Helicostvla, 411, 416. 



Helix, 411, 416. 



Helix (Cochlogena), 411. 



var. a, Helix (Cochlogena), 416. 

 floridus, Bulimus, 411, 416. 



Cochlodryas, 411. 



Helix, 411, 413, 416. 



Orthostylus, 411. 

 florigera, Goniocidaris, 276. 

 Aliens, Dimeregramma, 73, 178. 

 fluminensis, Nitzschia, 8, 126, 127. 



Surirella, 7, 155. 

 foliata, Surirella, 152, 181. 



forcipata, Navicula, 102, 111. 

 formicina, Navicula, 7, 102. 

 formosa, Amphora, 8, 23. 



Synedra, 160. 

 formosum, Pleurosigma, 132, 135. 



Trigonium, 164, 169. 



var., Trigonium, 164. 

 forresterii, Triceratium, 37. 

 fossilis, Navicula lacrimans, 107. 

 fractosa, Biddulphia, 39, 177. 

 Fragilaria, 77, 78. 



angustata, 77. 



dubia, 77. 

 fragilis, Tropidoneis, 173, 1/4. 

 Francisco, Mateo, 375. 

 frauenfeldii, Climaconeis, 148. 



Thalassiothrix, 160. 



Trigonium, 169. 

 Frustulia, 10. 



rhomboides, 147. 

 fulgens, Cochlostyla (Helicostyla), 400. 



Cochlostyla (Helicostyla) fulgens, 

 400,401,404,405. 



Cochlostyla mirabilis, 401. 



Helicostyla, 401. 



Helicostyla (Helicostyla), 401, 404. 



Helicostyla mirabilis, 401. 



Helix, 401. 



Helix (Helicostyla), 401. 



Synedra, 159. 

 fulgur, Cocconeis, 63. 

 fulva, Cochlostyla (Prochilus) fictilis, 



467. 

 fundata, Grammatophora, 78, 178. 

 funiculata, Navicula, 102, 179. 

 furca, Chaetoceros, 56. 

 furcata, Amphora, 8, 23. 

 furcatum, Bacteriastrum, 58. 

 furva, Helicostyla (Chrysallis) mindo- 



roensis, 515. 

 fusca, Amphora, 8, 23. 

 fusca, Navicula, 103, 106, 114, 121. 

 fuscata, Cochlostyla (Chrysallis) chry- 



salidiformis, 470, 475. 

 fuscolabiata, Cochlostyla florida, 413. 



Cochlostyla (Cochlodryas) florida, 

 411, 413. 

 fusiformis, Mastogloia, 88, 179. 

 galapagense, Triceratium, 166-168. 

 galapagensis, Coscinodiscus, 64. 

 gallinula, Obba, 343. 

 gastroides, Cymbella, 73. 

 gazellae, Coscinodiscus, 66. 

 gemina, Biddulphia, 40. 

 geminum, Trigonium, 169. 

 gemma, Surirella, 152. 

 gemmata, Navicula, 103, 116. 

 gemmatula, Navicula, 95, 103, 107. 

 genetta, Hesione, 189. 

 gertrudis, Cochlostyla. 398. 



Cochlostyla (Calocochlea), 381, 398. 

 gibba, Amphora, 8, 23. 

 inbbosa, Biddulphia, 40. 



Stictodiscus parallelus, 150. 

 gibbosum, Trigonium, 169. 

 gigantea, Amphora, 8, 23. 

 gigas, Coscinodiscus, 69. 

 gilberti, Stegopoma, 207. 



