380 CONTBIBUTION8 FROM Till: NATIONAL HERBARIUM. 



i;.ill- in l'riii h lli-l. hil'i; 8] . < |.\ e A « .nil: - 



Ak.i.l Bandl. 17 : 84. 1880. Grun. Verh. Zool. Bo1 Gee, Wien 12: 564. - 

 [> Toni, Syll. Alg. 2: 521. L892. Van II. u.. Synop. pi ■ 881. 



Elabh. PI. Eur. Alg. 1: 163. - 

 iMKi \\ . Smith, Synop. Brit, Diat 1: 39. pi. 14./. 116. 1863 not 

 Ehrenb. . 

 Vtl ■ Grun. in Cleve A Grun. Sv. Vet. Akad. Han. II 17 \ 



pi >../. 105 18* 



Pali'- changed William Smith's nam.' A. spectabilis to A. rmitkii because of the 

 i hii.il is of Ehrenberg. There i- no di fference between this and V. tnrigrnu, the 

 sigmoid Bhape of the rrustulee in A. tmilhii being a vanishing quantity in man} 

 and of no specific importance when present. As t rrunow saw only the zonal \ i.-w of 

 the last-named synonym above, it remains doubtful whether it was this or V tcalaria 

 Ehrenb. W. Smith. B. L. Smith's type referred to above is misnamed, being a true 

 A. tcalarit and identical with hie type no. 365, except that il i- a little smaller. The 

 two species which Van Heurck considers as possible varieties of N. insignis t a namely, 

 'atica Grun., band N. (adriatica var. ? spathulif era Grun. c are rather varieties of 

 A tcalarii, h is more difficult to include with A', scalaris \. insignia var. ?) nota- 

 I'ilis Grun., which Grunow* makes an unquestioned variety of the present Bp 

 Ii is certain it does not belong here. 



Pound at Btation 2823, Gulf of California. 



Nitzschia panduriforniis <i reg. Trans. Roy. Soc. Edinb. 21: 529. pi 14. f. 102. 1857. 



Van Beur. Synop. L72. pi. 58. f. i I ./. 5 6 doubtful). L881. Cleve, Bih. Sv. 



Vet. Akad. Bandl. 1": 12. L873. Cleve & Grun. Sv. Vet. Akad. Bandl. 17 2 : 71. 



{pl.5.f.92f 1880. De Toni, Syll. Alg. 2: 501. 1892. Van Heur. Treat. Diat. 



6. pi. 15. f. 500. 1896. Wolle, Diat. N. A. pi H.J. S ;. 9. L890. Pritch. 



Bist. Enfus. ed. I. 780. L861. 



Tryblionella lata Witt, Journ. Mus. Godef. 1: 66. pl.8.f. 6. 1873. Lagers. Bih. Sv. 



Vet. Akad. Bandl. 3 15 : 27. pi /./. >.. L876. 

 'Nitzschia lata Cleve, Bih. Sv. Vet. Akad. Bandl. 5 s : L2. L878. 

 Witt's '/'. lata is a very much more finely marked variety than the type, other- 

 wise quite typical; the form of it which Lagerstedt calls "var. elegans" Btands mid- 

 way between it and the type. Bis Buperb figure is, like all his figures in the same 

 work, a good approach to the ideal in depicting tin* diatom-. The A', panduriformis 

 nicobarica Grun.d does nol belong to this species, but is a form of his A. littoralts, 

 which in turn is a variety of N. tryblionella Bantzsch. There is some doubt with 

 regard to the two forms of Van Heurck's cited above, which also correspond to Cleve's 

 figure, their entire lack of the hyaline area, the so-called •.-ulcus.'' making them 

 questionable. Van Heurck' drops them out from the above category. 



Found at stations 2807, 2808, 2823, 2835, 3008H, Galapagos Islands to Gulf of Cali- 

 fornia and Hawaiian Islands. 



Nitzschia plana W. Smith, Synop. Brit. Diat. 1: 12. pi 15. f. 114- 1853. Van Heur. 

 Synop. pl.58.f. 10 11. L881; Treat. Diat. 387. pi 15. f. 508. L896. DeToni, Syll. 

 Alg. 2: 503. 1892. Rabh.Fl.Eur. Alg. 1: L53. L864. Cleve & Grun. Sv. Vet. Akad. 

 Bandl. 17-': 72. L880 not B. L. Smith, Sp. Diat. Typ. no. 363. 1874 . 

 Nitzschia marginulata didyrna Grun. in Cleve & Grun. Sv. Vet. Akad. Bandl. IT : 

 72. 1880. Van Heur. Synop. pl.58.f. i ;. L881. De Toni. Syll. Alg. 2: 504. 1892. 



a Van Heur. Synop. pi 61. f. ;. S. L881. 



'-Sv. Vet. Akad. Bandl. 17 : 84. L880. 



■ Op. cil - 



•i Fenzl, Reise Novara Bot. 1: 97. pi lA.f. ;. L870. 



' Treat. Diat. L896. 



