\! \ \ X DIATOMS 01 l 1 1 l. ALBATROSS VOYAi 



u iiln ,/i mina Km /. Bacill. LOO. 18 1 \" 

 Via icula gemina Schmidt, Ulas pi. IS. f. j 9, IS - i Jahresb. Komm. 



Deut. Meere 2: pi. t.f. I nol pZ. /../ 

 Thia brillianl and massive diatom, though a well-marked 3pecies, is represented 

 l.\ many figures bo bad as to cause confusion. Some of Schmidt's figures " of this as 



well as of the synonymous A', gemina^ are much i lelieatelj repi while 



others ■ are so aberrant as to be difficult of recognition. Wolle's figures "' are absolutely 

 deceptive. The form called by Donkin< "a var. from Northumberland " is evidently 

 .in example of N.didyma Ehrenb.) Kin/., ii also being from Northumberland. The 

 besl figures of the type are those of Ehrenberg, Van Beurck, and Schmidt, enu- 

 merated below. 

 Schmidl wrote "A", gemina A. S." instead of A. gemina Kiitz. or A. gemina 

 Ehrenb.) Kiitz.. because, as he Btates, he was unable to figure oul what the older 

 names represented. Cleve avoids the difficulty by omitting any reference to Kiitzing 

 or to the Pinnularia gemina Ehrenb. as figured in Schmidt's Atlas' or th< \ 

 bombus Ehrenb. Ii is, however, certain thai all these are the # same, unless ii be the 

 P. gemina Ehrenb., which in its single reference i look nponasanomen nudum. 



Found al stations 2916H, 2920H, Hawaiian Islands. 

 Navicula brasiliensls Grun. Verh. Zool. Bot. Ges. Wien 13: L52. pi. 14. f. 10. L863; 

 inFenzl, Reise Novara Bot. 1: L9. L870. Schmidt, Atlas pi. 6.J. 19 21, . 

 pl.6.f. mnamed). L875. Castr. Rep. Voy. ('hall. Bot. 2: 30. pi. 20. 



f. 1-2. 1886. Pant. Beitr. Bacill. Ung. 2: 43. pi. 5. f. 82. Cleve, Sv. Vet. Akad. 

 Han. 11. 27 : 17. pi. t.f. 19. 1895. I).- Toni, Syll. Alg. 2: 55. L891. 

 My specimens are identical with some unnamed figures of Schmidt's,* which he is 

 disposed toregard as representing a newspecies. The minute differences he cii 

 separating these forms from the above, as figured by 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. Edinb. 21: 478. pi. 9. f. -',. l s ">7. Van 

 Hour. Synop. pi. 11. f. 18 19. 1881. Donk. Brit. Dial. 19. pi. 3. f. .. 1871 7::. 

 Schmidt, Jahresb. Komm. Deut. Meere 2: pi. 2. f. 14-15. 1874. Pritch. Hist, 

 [nfus. ed. 4.899. 18(31. WoUe, Diat. \. A. pi. 10. f. 7, 17. De Toni, Syll. Al{ 

 L23. Cleve, in Nordensk. Vega Exped. 3: 165. 1883. 

 Navicula (brevis variety ?) distoma Grun. in Cleve & Grun. Sv. Vet. Akad. Handl. 



17-: 30. pi. t.f. 25-26. 1880. 

 Caloneis brevis Cleve, Sv. Vet. Akad. Han.il. 26-: 61, L894. 



Cleve mention- a- a possible synonym A', crassa Greg.3 in form they are much 

 alike, but I do not regard thorn as the same. It they were, A", crassa would super- 

 sede A", brevis. Gregory certainly did nol consider thorn the same, and a- Cleve A: 

 Grunow poinl out.'- they are distinguished by the far finer dottingof the striae in A'. 

 bn i is. 

 Found at station 2885, off < >regon. 



"Srhmidt. Atia- ed. 2. pi. IS./. 1 12. 1885. 

 b Schmidt, Jahresb. Komm. Deut. Meere 2: pi. :./. i. 1874. 

 'Schmi.lt. Atlas pi 69. ./'. 18 29. 1881. 

 *Wolle, Diat. X. A. pi 10. J - ■■>. />!. 23. f. 3. 1890. 



' Donk. Brit. Diat. pi 7. f. 7b. 1871 73. 

 ' Donk. .■(>. <it. /'. 8. 



g Ehrenb. Mikrog. />/. 19. f. 31. 1854. Van Beur. Synop. Suppl. pi B.f. 22. 1885 

 s.hini.lt. Jahresb. Komm. Deut. Meere 2: />!. i. f. m !>. L874. 

 i' Ber. Alsad. Wiss. Berl. 1840: 21 I. L841. 



Schmidt, Atlas ,,l S.f. 31 33. 1875. 

 /Quart. Journ. Mi.-r. s.i. 3: II. pi .. /'. 18. I s ">~> 

 - V.i. Akad. Handl. 17 : 30. 1880. 



