MANN DIATOMS OF THE ALBATROSS VOYAGES. 361 



Synop. Brit. Diat. 1: 16. pl. 16./. 129. L853. Rabh. Fl. Eur. Alg. 1: 171. L864. 



Pritch. Bist. [nfus. ed. I. 903. L861. Grun. Verh. Zool. Bot. Ges. Win, 12: 



549. pl.S.f. i in b. L860? Schum. Verh. Zool. Bot. Ges. Wien Suppl. 17: 68 



in«»i pi. ■;./. ;/>. L867. Donk. Brit. Diat. 12. pi. 6. f. 11. L842. Lewis, Proc. 



Acad. Phila. 1865: L0. pi. :../'. 10 11. L865. Cleve & Grun. Sv. Vet. Ucad. 



Bandl. 17": 17. pi. S.f. 59. L880. 

 Colletonema viridulum Breb.; Ktitz. Sp. Alg. L05. L849. II. L. Smith, Sp. Diat. 



Typ. qo. 88. L874. Pritch. Bist. [nfus. ed. I. 926. L861. 

 Navkula crassinervia Breb.; W. Smith, Synop. Brit. Diat. 1: 17. pl.Sl.f. ill. L853. 



Pritch. Bist. [nfus. ed. I. 900. L861. Grun. Verh. Zool. Bot. Ges. Wien 12: 548. 



pi. S.f. i '.. L860. Donk. Brit. Diat. 42. pi. 6.f I .'. L872. II. L. Smith, Sp. Dial 



Typ. no. 313. L874. 

 Fru8tulia torfacea A. Braun in Rabh. Sussw. Dial. 50. pi. ,'../'. '. L853. 

 Frustulia saxonica Rabh. Fl. Eur. Alg. 1:227. L864. Griff. & Benf. Micr. Diet. ed. 



3. 323. pi. 14. f. 17. L875. II. L. Smith. Sp. Diat. Typ. no. 172. L874. Rabh. 



Sussw. Diat. 50. pi. :../'. 1. L853. Pritch. Bist. [nfus. ed. I. 924. L861. Pfitz. m 



Banst. Bot. Abhandl. 2: 58. pi. ',./. i 8. L871. 

 Schizonema viridulum Rabh. Fl. Eur. Alg. 1: 266. L864. 

 Vanheurckia rhomboides Breb. Ann. Soc. Phyt. el Micr. Belg. 204. L868.Van 1 1 « - 1 1 1- . 



Synop. 112. pi. 17. f. I 2. L881; Treat. Diat. 240. pi. S.f 249 250. Truan, Anal 



Soc. Espan. Bist. Nat. 13: 352. pi. s.f. i. L884. 

 Vanheurckia crassinervia Breb. Ann. Soc. Phyt. el Micr. Belg. 204. L863. Van 



Beur. Synop. P l. 17. f. i 5. L881. Truan, Anal. Soc. Espan. Bist. Nat. 13: 352. 



•/>/. S. f. .'. I SSI. 



Vanheurckia viridula Breb. Ann. Soc Phyt. e1 Micr. I i < ■ 1 u r ■ 203. L868. Van Beur. 



Synop. 112. r I. 17. f 8. 1881. 



Frustulia viridula De Toni, Syll. Alg. 2: 278. L891. 



I have worked on! the above extensive synonym}- because this diatom is very 

 widely distributed and has been included in the older as well as the more recenl 

 diatom literature under so many names that the nomenclature is very confusing. 

 In one or two instances I have left out supposed synonyms, because their exact appli- 

 cation is impossible to determine. Thus Navicula lineolata Ehrenh." is included by 

 Cleve 6 in the above, though upon what basis I can not determine. The figures and 

 descriptions of Ehrenberg convey no image sufficiently exacl to determine even if it 

 belongs to this genus, much less if to this species. In fact. De Toni includes it, and 

 with as much reason, under Naviciiln serians (Breb. i Kin/.. 1 Many of Ehrenberg'e 

 figures are quite unlike the others. The Bame is true to some extent of the original 

 Navicula rhomboides Ehrenb., from which the above specific name is derived; and I 

 would not hesitate to pass over this authority, were it not for the fact that t hi- particu- 

 lar name ha.- been so constantly repeated by succeeding author- with better ti'jures 

 and descriptions that it is pretty certain this particular diatom is meant in each 

 instance. As these diatoms, though sometimes free, are generally inclosed in gelatin- 

 ous tubes or masse.-, the older observers nave especial attention to this transienl con- 

 dition; and in many cases we have elaborate descriptions of the appearance "\ these 

 forms irj hulk, without a word on the sculpture or build of the Erustules; and where 

 figures of the original plants are attempted they are likely to he bo minute as to be 

 worthless. Cleve has repeatedly stated his inability t<> identify some of these earlier 

 figures and deseript ions. 



Found at station 2885, oft I Iregon. 



" Phys, Abh. Akad. Wiss. Berl. 1841: us. ,,/. /. Ul.f. \a } pl. .'. VI. f. !7,pl. f. If. 6. 

 L843; Mikrog. \>f id. I. f. 8, II. f. I '. is:. I. 

 /-Sv. Vet. Akad. Bandl. 26-': L22. L894, 

 'De Tom. Syll. Alg. 2: I 11. L891. 





