382 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Nitzschia {sigwa vur. ?) major Grun.; Vaji Ileur. Synop. pi 05./. 6. 1881. 



Nitzschm {sigma var. ?) latiasmlu Clruii.; Van ITonr. Synop. pi. 65. f. j. issi. 



I loave out of the above list Navicula lamprocampaYMronh.n here included by 

 Do Toni,^ and Nitzschia daudi Hanl/.sdx<; phiced liere hy Griinow <^ II L Smilli 

 by changing Amphiplcura ,l,jmoidea W. Smith, to Nit.sclua sigmoidea has confused 

 It with the real Nitzschia sigmoidea \\. Smilli/ a diatom lliat can not be included 

 here. Regarding N. sigmatella Greg./ I can see no reason for iueluding it here as is 

 done by De Toni and others. There can be no doubt of the .V. sigma sigmatdla 

 Grun.,ff inchKleil above, which is a quite different diatom. 

 Found at station ?,1\-1\\, about 100 miles off Oregon. 



SPHINCTOCYSTIS Hass. 



Sphincionjslis ITas.s. Hist. Brit. Alg. 1: -130. pi 102. f. 3. 1845. 



Fmstulki ('. Ag. in part; Kiitz. LinnaeaS; 554. 183,1 



Navicula Bery, in part; J':hrenb. Infii.s. 185. pi. l.i.f. '22. 1838. 



Denllnda Kiitz. in part; Bacill. 44. pi. .?./ t;o. 1844. 



SunrcUa Turp. in part; Elireid,. Mikrog. pi laA.f. .r>o^,u issi 



('iimafoph-nra W. Smith, Ann. Ihig. Nat. Hist. II. 7: 12 pi .1 f S-9 mi- 



'?i'"''p'K- Z'"'-!'- ''■ ^'- '"^' ''^''- '''■^- ^^- f- '^-i^i^' ThJ Lens'l: 85.' 

 18/.. Balf.s, rrit.'li. Hist. Infu.s. ed. 4. 793. 18G1. Van Ileur. Svnop. 107 1881- 



Although thi.s genus sh.nvH elu.sc relation to Surirella Turp., and <.ven closer to the 

 forms <,f .\itz.sehia Ilass., whirl, were formerly inr]ude<l in Tryblionella W Smith 

 its di.stinctnesH IS generally conceded.'' ' ' 



The older name of Ilassall is h<Te restored. Smith, in rejecting this name, says: 

 I should have been glad to have adopted Mr. Hassall's genus 'Sphinctocy.stis ' but 

 as tins term refers m<.rely to a peculiarity in the external form of one species I am 

 Ob iged to reject it." If the failure of a name to be accurately desci-iptivc' were 

 vahd cause for its n^jectinn, Smith's substitution would also have to go 

 Sphinctocystis librile (Ehrenb.) JLiss. Hist. Bnt. Alg. 1: 41^;. pi 102. f. .?. 1845. 

 Aar,mZa J.6n. Lhrenb. Phys. Abb. Akad. Wiss. B.mI 1831: 81. 1833; 1833: 207 



183o; B<.r._Akad. Wiss. Berl. 1836: 53. 1837; Infus. 185. pi n. f. 22. 1858 

 J' rmlului qmnque punctata Km z. Linnaea 8: 554 j^l ij f 'S 1833 

 Surirella solea Breb. in Breb. & God. Cuiisid. 17. 1838. ' Katz. Bacill GO pi ? f. 

 67. 1844^ Rabh. Sussw. Diat. 28. pi .,./. 7h-c. 1853. Kiitz. Sp. Alg. 34. 1844 

 Weisse, Mel. Bnd. Acad. Sci. St. IVtersb. 4: (-(iO. pi 1 f. 18 1SG5 

 Surirella librile Ehrenb. Mikrog. pi r>. I.f. /,9, pL /;./, .^g i854 

 Cymntopkura solea W. Smith, Ann. Mag. Nat. Hist. II. 7: 12 pi S f. 8^9 1851- 

 Synop Brit. Diat 1: 30. pi lO.J. 78. 1853. Pritch. Hist. Infus.'ed. 4. 793. pi. U. 



Vc.h. W.-Bot. Ges ;\ u.n 12: 4(;(L 1862. U. L. Smith, Sp. Diat. Tvp. no. 114. 

 1874. Bran, Diat. Alp. 97. pi l.f. w. 1880. Gleve k Moll, type no 22(i-'^27 

 Van Hour. Synop. pi 55. f. 5^7. 1881; Treat. Diat. 307. pi 12. f. 48 ^b ISOo' 



' ^ — ^— ^ ^ 



a Kiitz. Bacill. 102. pi 4.f. 5. 1844. " 



i'De Toni, Syll. Alg. 2: 530. 1892. 



t-TIedwigia 2:40. ISGO. 



(^Journ. Roy. Micr. Soc. 2: 22. 1879. 



«W. Smith, Synoi>. Brit. Diat. 1: 38. ;;/. u.f. 104. 1853. 



/Quart. Journ. Micr. Sci. 3: 38. /)/. .;./, 2. 1S55. 



i?Van Ileur. Synop. pi. 0€.f. 6. 1881. 



f> See remarks under Gymatopleura by AV Smith, and by Ralfs in the above citations 



