M\NN DIATOMS -'l Mil. ILBATROSS VOYAGES. 30*! 



of geological interesl to kno\* how this rare and peculiar diatom came to be present in 

 these i wo localit ies. 



Found al station 2920H, Bawaiian [elands. 



Biddulphia primordialis Brun, Mem. Soc. Phys. et Bist. Nat, 31 : 12. pi. 



13. f. 9, pi. i -. /' 9. L891. Schmidt, Atlas pi. L72./ .:. (not/ 5). 18 

 Odontella primordialis DeToni, Syll. Alg. 2: 864. L894. 



Grove has suggested •■' this being only a variety of B. edwardsii Febiger.6 I have dis- 

 ci the impombility of looking on these two as the same Bpecies under the heading 

 of 1>. edwardsii above. 



I I.... k upon figure 5 in the above citation from Schmidt's Atlas as an entirely dis- 

 tincl diatom. 

 Found in stations 2844, 3263H, off Alaska Peninsula and Aleutian [slands. 



Biddulphia pulchella Gray, Nat. Arr. 1: 2'94. L821. Grev. Trans. Micr. Soc. Lond. 

 n. s. 10: 25. pi. S.f. S . L862. W. Smith, Synop. Brit. Diat. 2: 18. pi. . .. /. 321. 

 L856. Pritch. Hist. Infus. ed. I. 848. pi. 2.f.56 60. L861. Schmidt, Atlas pi. 118. 

 i 26 .,.-. pi. t21. f. l 2. L888. O'Meara, Proc. Roy. [rish Acad. 11. 2: 275. pi. 27. 

 f.9. L875. Van Heur. Synop. 204. pi. 97. f. l 5. 1881-1885. Rabh. Fl. Eur. Alg. 1: 

 310. 1864. De Toni. Syll. Alg. 2: 870. L894. "Eng. & Pr. Pflanzenfam. l lb : 42/ 

 I ( . 1896. 

 Conferva biddulphiaria J. I-:. Smith. Eng. Bot. 25:/-/. L762. L807? 

 Diatoma biddulphianum C. Ag. Syst. Alg. 5. L824? 

 Denticelh biddulphia Ehrenb. Phys. Abh. Akad. Wiss. Berl. 1841: pi. :. 17 



L842. 

 Biddulphia quinquelocularis Kiitz. Bacill. 138. pi. 19. / /. 1844. 

 Biddulphia septemloeularis Kiitz. Bacill. 138. pi. 19./. 2. L844. 

 Biddulphia trilocularis Kin/. Bacill. L38. pi. 29.f.89. L844. 

 Bi'/'l'ilph/'u transversa Wigand, Hedwigia 2: 45. pi. I.f. 18. 1860. 

 Biddulphia unifasciata Wigand, Bedwigia 2: 45. pi. ;./. 19. 1S60 

 Biddulphia bifasciata Wigand, Bedwigia 2: 45. pi. 7. /'. 20. 1860. 

 Biddulphia Uddulphiana Boyer, Proc. Acad. Phila. 1900: 694. L901. 

 The question of the substitution of the name Biddulphia biddulphiana .1. E. Smith 

 Boyer, c for the above depends on whether or not the figures given l>y Smith ''arc iden- 

 tical with this species. There should be no question of such identity before a 

 name like this one, of 1"Hl: standing and adopted in Dearly every <liat< >m work extant. 

 is discarded. In this case two facts should he borne in mind, first, that this species is 

 similar to several other species generally recognized as worthy of separate rank which 

 arc equally like the figures "i .1. E. Smith. Such are Biddulphia grundleri Schmidt,* 

 which is not united with this species by either De Toni or Boyer, and Biddulphia 

 tridens Ehrenb. f The second fact is that the figures of J. E. Smith are not those of one 

 Bpecies. 1 have, therefore, not followed Boyer in making the abpve specific name a 

 Bynonym under thai of J. E. Smith's. 



This widely distributed species is remarkably infrequent in the Pacific dredgings 

 examined by me. In Done of the following gatherings was it at all abundant. 



Found at stations 2807, 2808, 2920H, 3604,. Galapagos [slands, Bawaiian [slands, 

 and Bering S 



a Schmidt. Atlas pi. /:.'./. .. L892. 

 i' Op. cit. pi. 167. f 5-6. 

 cProc Acad. Phila. 1900: 694. L901 

 '/.I. E. Smith. Eng. Bot. 25: pi. 1762. L807. 

 ' Schmidt. Atlas pi. lis./. 22 ... 1888. 



' Ehrenb. MikroL r . pi. 19. f. :l. pi 10. /./. 53. L854. meyi Kail. Am. 



Journ. Sci. 46: 138. pi. S.f .;. 4, 8. L844.) 



