:\IAXX — DIA roMiS OF THE ALBATIU)8S VOYAGES. 330 



Xdiirulfi (jcmiua Kiil/. Ilacill. 100. 1844? 



Xackuld gcnana S(hiniJt, Alias pi. Lj. f. -/-^>, 1'^- l-U ^^'^- 1875; Jahrosb. Komm. 

 Dcut. Meere 2: pi I . f. I (nut pi 2.f. 1). 1874. 



This brilliant and nias.^ive diatom, thougli a \v(4binark(Hl .specios, is reproi^ented 

 !)y many ligurt^s so bad as to causo confusion. Sonic of Sihniidt's f]<,nu'oy '^ of tliiw as 

 well as of tlio synonymous .V. gemina^ are much tnu d<4icatcly represented, while 

 (^Uiers ^ are so aberrant aslobedinicnlt of ixH'Ognition. AViJle's figures'^ are absolutely 

 dec(*ptive. The form calhd by Donkin^ '' a var. from Nortlumibciland" is evidenily 

 an example of X. didijma (Ehrenb.) Ki'Uz.,^ it also l)cing from Northumberland. The 

 l)est figures of the type are those of Ehrenberg^ Vati Ib'invk, and Schmidt, £? enu- 

 merated below, 



Schmidt wrote "A", gonina A. S." instead of N. gcmina Iviitz. or .V. gcmlna 

 (Ehrenb.) Kiitz., because, as he states, he was unable to figure out what the oldca* 

 names represented. Cleve avoids ihe dinn-ulty by omitting any reference to Kiit/ing 

 or to the Pinnularia gentina EhnMib. as figured in Schmidt's Atlas ^ or the N'avuuJa 

 ?>o/;//ni.*? Ehrenb. It is, liowever, certain that all these are the*same, unh^ss it l)e ihe 

 P. gemina Ehrenb., which in its single reference I liKik upon as a nomen nudum. 



Found at stations 291G11, 202011, Hawaiian Islands. 



Navicula brasiiiens^s Grun. Verb, Zooh Bot. Gt\s. W'ien 13: 152. pi 14- J- P^- 1863; 

 inFenzl, Reise Xtjvara Bot. 1: 19. 1870. Schmidt, Atlas pi G.f. 19-21, 23-25, 

 pi G.f. 31-33 (unnamed). 1875. Castr. Rep. Voy. (Tiall. Bot. 2: 30. pi 20, 

 f. 1-2. 1886. Rant. Beitr. Bacill. Ung. 2: A?>. pi 5. / 82. Cleve, Sv. Vet. Akad, 

 HandL 27^: 47. pi l.f. 10, 1895. De Toni, Syll Alg. 2: 55. 1891. 



• ^fy specimens are idf'Utical with some imnamed figun^s of Schmidt's,^ which h<* is 

 disposed to regard as r(pres<'nting a new species. The minute differences he cites ftir 

 separating these forms from the above, as figured l>y him on the same plate, are 

 hardly sufficient to mark them as varieties, much less species. 

 Found at station 2920H, Hawaiian Islands. 



Navicula brevis Greg. Trans. Roy. Soc. p]dinb. 21: 478. pi 9. J. 4- 1857. Van 

 Ileur. Synop. pi 11. f. 18-19. 1881. Donk. Brit. Dial. 19. pi 3. f. -I 1871-73. 

 Selunidtj Jahresb. Komm. Deut. Meere 2: pL 2. f. 14-15. 1874. Pritch. Hist. 

 Infus. ed. 4. 899. 1861. Wolle, Dial. N. A. pi 10,/. 7, 17. De Toni, Syll. Alg. 2: 

 123. Cleve, in Xordensk. Vega Exped. 3: 4G5. 1883. 

 Navicula {brevis \a.rwty '?) disLoma Grun. In Cleve & Grun. Sv. Vet. Akad. Handl. 



17*: 30. pi l.f. 25-26. 1880. 

 Caloneis breiis Cleve, Sv. Vet. Akad. Ilandl. 26-: Gl, 1894. 



(levc mentions as a possible synonym N. crassa Greg.; In form they are nuieh 

 alike, but I do not regard them as the sam(\ If lluy w(»re, V. crassa would suijcr- 

 sede N. brevis. Gre<rorv certainlv did not consi<hT them th<^ same, and as Cleve & 

 Grunow point out/' they are <listinguished by the far finer dotting of th(^ stria*^ in .V 



brevis. 



Found at station 2885, off Oregon. 



"Schmidt, Alias <h1. 2. pi 13, f. 7- y /. 1885. 

 ^ Schmidt, Jahresb. Xomni. Deul. Meere 2: pi 2.f. 1. JS74. 

 <- Schmidt. Atlas pi GO./. 28-29. 1881. 

 ^^Volle, Diat. X. A. pi 10. f 47-48, 50. pi 23 J. 3, 1890. 

 •^Donk. Brit. Dial, pi 7. f 7b. 1871-73. 

 /Donk. op. cit./. 8. 



i/ Ehrenb. Mikrog, pi J!Kf 3L 1854. Van Mvnv. Synop. Suppl. pi B.f 22, 1885. 

 Schmidt, Jahresb. Komm. Deut. Meere 2: pi 7./ la-b, 1874. 

 ABer. Alsad. AVi^s. l?erl. 1840: 214. 184L 

 /Schmidt. Atks pi G.f, 31-33. 1875. 

 jQuarl. Journ. Micr. Sei. 3: 41. pi ;./. 18. 1855. 



A-Sv. V<4. Akad- llandh 17": MU. 1880. 



