MANN— DIATOMS OF I III. ALBATROSS VOYAGES. 343 



Diploneis didyma Ehrenb. Mikrog. pi i ■ .'. pi it > 



f.60 ? . L854. Cleve, Sv. Vet. Akad. Handl. 26 : 90. L894. 



Here again ii is a questi m if Ehrenberg should be quoted as the author of tin- name. 

 A bare reference to Pinnularia didymus is followed by a confusion of irreconcilable 

 figures. Thai a well-understood conception has grown around this name i- certain, 

 hut thai ii matches Ehrenberg's form or forms can nol be proved. < 'leve drops Ehren- 

 berg "in of the categi >ry, excepl for the original reference. I >«• Toni masses the hete- 

 rogeneous l"i from Ehrenberg and other aul hors withoul comment. Be also includes 

 here A'. {Pinnularia) apis Ehrenb. a thing nol to be commended. There are a large 

 Dumber of diatoms of this general build, and the above species doubtless grad< 

 into A'. bombu8 i Ehrenb. i Km /.. on the one hand and A', sph ndid the other. 



Their drawings are -till more liable to overlap. Bui aside from the fad thai A', apis 

 Ehrenb. is an indefinite quantity, the modem conception of ii in Kiitzing, Donkin, 

 and others can uol be joined with this Bp< ci< 



Found al station 3008H, Hawaiian Islands. 



Navicula distans W.Smith) Ralfs, Pritch. Hist. Cnfus. ed. 4. 907. L861. Schmidt, 

 Jahresb. Komm. Deut. Meere 2: 91. pi. 2. f. 38 unnamed . 1874. Schmidt, Atlas 

 pl.46.f. tl-14. 1876. O'Meara, Proc. Roy Irish Acad. II. 2: 343 nol pi 

 f.6). 1875. Cleve, Bih. Sv. Vet. Akad. Handl. 1 : 17. 1-::;. Grun. in Cleve & 

 Grun. Sv. Vet. Akad. Handl. 17 2 : 38. pi .'../'. >'■ 1880. Grun. Denkschr. Akad. 

 Wien 48-: 55. pi. l.f. 26. L884. Van II. -nr. Synop. Suppl. 87. pi A.f. 18. L885; 

 Treat. Diat. 185. pi. S.f. 133. L896. DeToni, Syll. Alg. 2: 53. L891. Cleve 

 Vet. Akad. Han. 11. 27 : 35. 1895. 

 Pinnularia distans W. Smith, Synop. Brit. Diat. 1: 56. pi 18. f. 169. 1853. Rabh. 



Fl. Eur. Alg. 1: 217. 1891. 

 Found a1 Btations 3526, 3604, 3635H, 3692H, Beringand Okhotsk seas. 



Navicula fluminensis Grun. Verh. Zool. Bot. Ges. Wien 10: 520. pll.f.7. I860. 

 Cleve, in Nordensk. Vega Exped. 3: 163. 1888. Cleve & Grun. Sv. Vet. Akad. 

 Handl. 17 2 : 28. pi l.f. 12. 1880. DeToni, Syll. Alg. 2: III. L891. 



Navicula fluminensis var.?) Jloridana Cleve, Sv. Vet. Akad. Handl. 18"': 6. pll. 

 f. W. L881. DeToni, Syll. Alg. 2: 35. L891. 



Navicula loczyi Pant. Beitr. Bacill. Ung. 2: 51. pl.6.f. 1 1 :. 1889. 



Cleve makes this a variety of Pinnularia quadratarea (Schmidt) Cleve, which is 

 his own N. pinnularia.b He says, however, regarding A'. fluminensis: "I have nol 

 Been original specimens and am therefore uncertain whether this form beloi 

 /'. quadratarea or whether it is a Caloneis." It has no likeness to thai form, excepl 

 in its having the transverse striae interrupted by a stauros al the center. My speci- 

 men is much larger than anyobserved byGrunow, his largesl variety kuguelensis) 

 being 0.057 mm. long, while mine is 0.085 nun. long. Bui Cleve's N. Jloridana and 

 Pantocsek's N. loczyi approach it, the former being 0.075mm. and the latter 0.081mm. 

 long. 



Found al station 3692H, Okhotsk Sea. 



Navicula formosa Greg. Trans. Micr. Soc. Lond. n. -.4: 42. pl.5.f.6. 1856. 

 Schmidt, Atlas pi 50. f. 9 r, aotf.8,15). L877. II. I.. Smith, Sp. Diat. Typ. 

 no. 274. L874. Pritch. Hist. [nfus. ed. l. 909. 1861. Van II. •nr. Synop. 102. 

 pi n. f. .'. 1881 85; Treat. Diat. 218. pl.5.f. 199. 1896. De Toni, Syll. Alg. 

 2: 1 12. L891. 

 Pinnularia oregonica Ehrenb. Phys. Abh. Akad. Wise. Berl. 1870: pi .'. 1 

 1871. 



"Sv. Vet. Akad. Handl. 27 : 96. 1895. 



&Ofv. Kgl. Vet. Akad. Forhandl. 25: 224; pi \.f. i .. Lfi 



31713 vol It) it 5 07 9 



