MANN- DIATOMS OF THE ALBATBOSS VOYA< 341 



Pinnularia megaloptera Ehrenb. Mikrog. pi 3. I i. . /// f L854 IM.y~.AI.li. 



Akad. Wiss. Berl. 1870: pi 3. If. 16. 1-71. 

 Navicula megaloptera Berib. Diat. A.uvi 



Navicula costata Ehrenb.; Berib. Diat. Auverg. 87. pi ;../'. 7. L893, ool Kutz. L844. 

 A mistake thai is constantly being repeated is the uniting of Kutzing's figure with 

 this species, to which ii has not the remotesl resemblance. 1 1 is the same as A . micro- 

 stoma Kin/.." which La only a variety of Y. firma Kin/., as I >■■ Toni& and others 

 point out. Nevertheless, !>'• Toni," after recognizing this fact, quotes this error of 

 Kutzing. Cleve falls into the same mistake, though omitting any reference to the 

 figure of Kutzing, his diagnosis being in perfect harmony with his figure Both 

 Donkin and < >'Meara in the above citations note the mistake made by Kutzing. 



Found at Btation 361 I . Bering 

 Navicula lyra Ehrenb. Phys. Abh. Akad. \\ iss. Berl. 1841: H9. pt. I. I. f 9a. 1843. 

 Kutz. Bacill. 94. pi 28./. 55. 1844. Greg. Trans. Roy. Mici So< Edinb. 21: 185. 

 pi. 9.f. 13 14b. L857. Jan. & Rab. in Rabh. Beitr. 1: 10. pi S.f. :. 1863. Jan. 

 Abh. Schl. G< s. Vaterl. Cult. 1862 : pi lA.f. 26. L862. W. Smith, Synop. Brit. 

 Diat. 1: pi 17. f. 152a . L853; 2: 93. L856. Pritch. Bist. Eufus. ed. 1.897. 1861. 

 Donk. Brit. Diat. 11. pi 2.J. 7. 1-71 7:;. Schmidt, Atlas pi 2. f >, 16, 



18 (not. /. 29 S3, f. 25 21 doubtful). L875; Jahresb. Komm. Deut. Meere 2: pll. 

 f. . all doubtful). L874. Rabh. Fl. Eur. Alg. 1: 177. L864. Van 



Heur. Synop. 93. pi 10. f i 2. 1881-85; Treat. Diat. 203. pi If. 161. L896. Jan. 

 Diat. Gaz. Exped. pi 15. f. 8 9, 13. Cleve, Bih. Sv. Vet. Akad. Bandl. 5 : 4. pi 

 l.f. 1. 1878; Sv. Vet. Akad. Handl. 27 : 63. L895. De Toni, Syll. Alg. 2: 

 1891. Pant. Beitr. Bacill. LTng. 1: 27. pi 17. f. 150. L886; 2: 50. L889; 3: pi 

 S3. f 166, 168, pi S4.f. 479. L893. Grev. Edinb. New Phil. Journ. n. s. 10: 28 

 pi. \.f. 3. L859. Castr. Rep. Voy. Chall. Bot. 2: 33. pi. SO. f. 13. 1886. Truan, 

 Anal Soc. Espan. Bist. Nat. 13: 44. pi s.f. .-., : ,. L884. (dam. Verh. Zool. Bot. 

 3. Wien 10: 532. pi S.f. 22 not /. 23). 1860. H. L. Smith. Sp. Diat. Typ. no. 

 292. 1874. Welle Diat. X. A. pi 16. f :. 6, 9, 14, 26. L890 

 Navicula bullata Norm. Trans. Micr. Soc. Lond. n. s. 9: 8. pi 2. f. .. L861. Moeb. 

 Diat.-taf. pi 36. f. 7. 1890. Schmidt. Atlas pi S.f. 8-9. L875. Castr. Rep. Voy. 

 Chall. Bot. 2: 29. pi. 28. f 7 (not/ 10), pi SO.f. 7. L886 

 Pinnularia couperit Bail. Smithson. Contr. Knowl. 2": 39. pi 2. f. S3. L851. 

 Navicula couperi Bail. ; Schmidt. Atlas pi 2.f. 12. L875? 



Navicula zanzibarica Grev. Trans. Micr. Soc. Lend. n. b. 14: L29. pi 12. f. 22. I s -''.'''. 

 Schmidt, Atlas pi 2.f. S. L875. Castr. Rep. Voy. Chall. Bot. 2: 31. pi 

 1886. 

 Navicula robertsoniana Grev. Trans. Bot. Soc. Edinb. 8: 235. pi S.f. 9. L866. 



Schmidt. Atlas pi '..j. 7, 11. L875. Wolle, Diat. X. A. pi. 16. f. 8. 1890. 

 Naviculadu andii Kin.: Schmidt. Atlas pi 129. f 1 S. L888 



I have not included here the reference in ( >'Meara,d because all -ix figures are worse 

 than worthless. Nor i- Schmidt's tLMire. cited above and called A", coupt ri Bail., like 

 the original or a good example of N. lyra. Cleveadds N. seductilis Schmidt,* which 

 I also emit . Et is plain that tin- polymorphic form has no hard and fixed boundaries, 

 and that what is to be included or what not must always be somewhat a matter of per- 

 gonal preference. I feel that in this and similar cases condensation oughl to be carried 

 only so iar a- that the average -indent will he more likely to pick out the s] 

 assigned than any other. Where, in other words, tin- relationship begins to 



" Kin/. Sp. Alg. 71. L849. 



b De Toni, Syll. Alg. 2: L55. L891. 



<<>],. cit. L8. 



d Proc. Roy. Erish k.cad. II. 2: 391. pi. 1875. 



' S< hmidt. Atla- pi :. i. 35 6 L875. 



