318 CONTRIBUTIONS FROM nil. NATIONAL HERBARIUM. 



P int. Beitr. Bacill. Ung. 9 389. De Toni, 



Syll. \l_v 2: 1023. L894. 



Pant. Beitr. Bacill. Ung. 3: j !>■• Toni, Byll. 



/Ug. 2: 1024. L894. 



lata Temp. & Brun, Mem. Soc. Phys. el Hi Geneva 31 



pi L891. De Toni, Syll. Alg. 2: 1022. 1894. Pant. Beitr. Bacill. 



3: 

 /,' • i radiata Gr. & St. Journ. Quek. Micr. Club II. 2: 322. pi. 18. J 



L886. 

 /; - '•• a edentula Castr. Rep. Voy. Chall. Bot. 2: 92. pi. />../'. /;. I- 

 R Grev.; Cleve. Bih. Sv. Vet. Akad. Handl. 18': L9. L881?. 



Grev. Trans. Micr. Soc. Lond. n. b. 14: I2b.pl 11./. n 12. I s '. 6. 

 Moeb. Diat. taf. pi. :;../". // /.'. L890. DeToni, Syll. Alg. 2: L022. L894? 

 RutUaria elliptica Grev. Quart. Journ. Micr. Sci. n. b. 3: 229. pl.9. n 

 Moeb Diat. taf. p 9 /". 1890. Trans Micr. Soc. Lond. n. b. 



14: L25. pJ. //../'.'' ?0. L866. De Toni, Syll. Alg. 2: L022. L894? 



i Grev. Quart. Journ. Micr. Sci. n. s. 3: 228. pl.9.f. L863. 

 Tain. Beitr. Bacill. Ung. 1: II. pl.9.f. 78. L886. Moeb. Diat.-taf. pi 

 L890. De Toni, Syll. Alg. 2: L022. L894? 

 This species is Bubjecl to greal varial ion. A good gathering will show nearly all the 

 forms represented by the above names, together with intergradations. /.'. radiata, 

 if judged from the figure alone, would Beem quite distinct, bul interpreting the lines 

 as row- of beads, as we learn from the diagnosis that they are, we see thai we have to do 

 with an unimportant variety of the above. Ii is practically identical with /.'. edentula 

 Castr. There is some doubt as to the worth of the Last three names with the authority 

 of Greville, bul a comparison of the forms represented by these with all the above 

 will indicate thai they arc probably varieties. 1 have followed the names with a 

 question mark. The doubl over />'. eh, sum is due to the Lack of a figure. So far as 

 can be made ou1 it belongs here. 

 Found at station 4029H, Bering Sea. 



DENTICULA Kutz. 



hi nticula Kutz. Bacill:. 13. (nol pi. 8. f. SOa-b >. L844. Char, emend. Grun.Verh. Zool. 

 Bot. Ges. Wien 12: 546. L862. Pritch. Bist. [nfus. ed. 1. 773. pi 18. /. 4. 

 L861. Van Hour. Synop. L59. pi ;'>./. 1 88. L881. Rabh. l'l. Eur. Alg. 1: L2, 

 L14./. SO. L864. DeToni, Syll. Alg. 2: 557. L892. \Y. Smith. Synop. Brit. Diat. 

 2: L9. pi 84. f. '■'■' -'•'■>■ l s: ><>- Griff. & Benf. Micr. Diet. ed. 3. 230. pi It. / 

 15. L875. Brun, Diat.Alp. L12. pi 8. f. 84, 86 S7. L880(no1 Trans. Roy. Soc. Edinb. 

 21: 195. pi IO.f.34 86, 88 89 (except/,57 . L857; Verh.Zool. Bot. Ges. Wien 12: 

 548. pi 12. f. 15. L862). 

 Eunotia Bhrenb. Mikrog. pi 84. V. B.f. • 8. L854, in part. 

 OdonHdium Kin/, in part; O'Meara, Proc. Roy. Lrish Acad. II. 2: 288. L875. 

 The '_ r -nu- as originally defined by Kiitzing is very indefinitely bounded and con- 

 tain- members of Beveral other genera. Grunow's emendation is also quite faulty, 

 as he losl sighl of the true transverse character of the strong costae and thereby opened 

 the way for costae on only one side of the valve; in other words, shorl and broad forms 

 of Nitzschia. The genus is well marked by Van llenrck." and the illusl rat ions, which 

 include all the figures of plate 49, are consistenl and decisive, [ts nearesl relative is 

 Diatoms (DC. Beib., from which it is easily distinguished by the absence of an 

 evident hyaline median line on the valves i ■' pseudoraphe" I, by it- rounded, uncon- 



a Van Heur. Synop. L59. L885. 



