364: CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Gyrosigma formosum (W. Sniitli) Griff. & llcuL Micr. Diet. ed. 3. 355. pL 11. f. 25. 

 1875. 

 PleurosigmaformositmW. Smithj Ann. Mag. Nat. Hist. II. 9; 5. pi. /./. 1-2. 1852; 

 Synop. 15rit. Diat. 1: 63. pi 20. f. 195. 1853, Ral)li. Fl. Eur. Alg. 1: 231. 1864. 

 Cleve & Grun. Sv. Vet. Akad Handl. 17-: 48. 1880. Van IIiMir. Synop. 116. pi. 

 19. J. 4^ II. L. Smith, Sp. Diat. Typ. no. 402. 1874. PriLcli. Hist. Infus. ed. 4. 

 917, pi 8,f, 32, 18GL Griff. & Henf. Micr. Diet. ed. 3. pi 11. f. 25, 1S75. Cleve, 

 Sv. Vet. Akad. Handl. 26-^: 45. pi A.J. 21. 1894. De Toni, Syll. kV^. 2: 243. 

 1891. Perag. Le Diatoniiste l^-': 4. pi l.J, 1-6. 1891, Van Henr. Treat. Diat. 

 254. pi G.f. 2G8, 1896. 



Pleurosigwa (keorvvi\\. Smith, Synop. Brit. Dial. 1: 63. pi 21. f, 196. 1853. Pritcli. 



Hist. Infus. ed. 4. 918. 186L Kabh. FI. Eur. Alg. 1: 232. 1864. 11. L. Smith, Sp. 



Diat. Typ. no. 694. 1874. Cleve in Norden^k. VeG:a Exped. 3: 497, 500. 1883. 



Van Hour. Synop. 116. pi 19. f. 1. 1881. Perag. Le Diatoniiste 1-*'^: 5. pi l.f. 



9-13 {pi 2. /. 6-9 doubtful). 1891. Van Heur. Treat. Diat, 254. pi 6'. / 269. 1896. 



Griff. & Ilenf. Mier. Diet. ed. 3. pi 11. /. 26. 1875. De Toni, Syll. A1-. 2: 243. 1891. 

 Pleurodgma audralicum Witt, Journ, ]Mus. Godef. 1: 70. pi s/f. 7. 1873. De Toni, 



Syll. Alg. 2:246. 1891. 

 Pleurosigma tahitiense Witt, Journ. Mus. Godof. 1: 67. pi 8.f. 13. 1873. De Toni, 



Syll. Alg. 2: 245. 1891 (not P. tahitiense Castr. Rep. Voy. Chall. Bot. 2: 38. pi 28. 



/. 4. 1886). . 



Pleurosigma pukhrum Grun.; H. L, Smith, Sp. Diat. Typ. no. 695. 1874 (not P, 

 pulchrum Grun. A^erh. Zool. Dot. Ges. Wlen 10; 556. pi 4. f. 2. 1860; not Perag. 

 Le Diatomittte 1^"^: 4. pi l,f. 81, 1891.). 



The Grunow variety longimiua, as figured by Peragallo,^ occurs at station 2848 and 

 an unusually largt^ and robust variety at station 3603; also the P. decorum variety at 

 station 371211. 



Found at stations 2848, 2929, 3603, 369111, 3712H, Okhotsk and Bering seas to 

 southern California. 



Gyrosigma inermedium (W. Smith) Griff. & Henf. Micr, Diet. ed. 3. 356. pi 11. f. 36. 

 1875. 



Pleurosigma intermedium W. Smith, Synop. Brit. Diat. 1: 64. pi 21, f. 200. 1853. 

 Priteh. Hist. Infus. ed. 4. 918. 1861. Van Heur. Synop. 116. pi, 18, f. 6. 1881. 

 Treat. Diat. 253. pi 6. f. 261, 1896. H. L. Smith, Sp. Diat. Ty]). m>. 405. 1874. 

 De Toni, Syll. Alg. 2: 235. 1891. Perag. Le Diatoniiste 1^-^: \\..pl 5. f. 21-28 

 (/. 29 <loubtful). 1891. 'Cleve k Grun. Sv. Vet. Akad. Handl. 17': 52. 1880. Rabh. 

 Fl. Fur. Alg. 1: 234. 1864 (not Truan, Anal. Soc, Espan, Hist. Naf . 13: 49. pi 9. 

 f. 2. 1884). 



Plenrosigma nubecula W. Smith, Synop. Brit. Dial. 1: 64. pi 21. f. 201, 1853. Cleve, 

 Sv. Vet. Akad. Handl. 26': 34. 1894. De Toni, Syll. Alg. 2: 235. 1891. Rabh. 

 FI. Eur. Alg. 1: 232. 1864. Perag. Le Diatoml.ste 1^-': 14. pi 5.f. 26. 1891. 



Pleurosigma thunil Civstr.; Perag. Le Diatomiste 1''^: 14. pi 5.f. 25. 1891. 



Pleurosigma suhrectuvi Cleve in Cleve k Grun. Sv. Vet. Akad. llandl. 17-: 14, 53. 

 j)l S.J. 72. 1880. Perag. Le Diatouiiste 1'-'': 14. pi 5. J. SO. 1891. 



Pleuromma elongatmn balaerievm Perag. Le Diatoniist(^ 1: 7. pi 2. J, 22, 1891. 



Cleve agrees to the pra<*tical icU'iitity (»f /*. ivtermfdium and P. nubecula, as d ) Van 

 Hevu'ek and Peragallo, but for Hoine reastm ln^ has selected the les.« known name n}!be- 

 cula, occurring after interviedium in Smith's Avork, instead of intermedium. 



Found at station 3091, off On^gon. 



Gyrosigma normanii (Ralfs) Mann. 

 Pleurosigma normanii V.dAi'A] Priteh. Hist. Infus. ed. 4. 919. 1861. Ra1>h. Fl. Eur. 

 Alg, 1: 236. 1864. Cleve k Grun. Sv. Vet. Akad. Handl. 17^: 14, 52. pi 3 J. 67. 



<3Loe. cit. 



