-I r 



MANX^DIATOMS OF THE ALBATROSS VOYAGES. 337 



phortor, giving tlierel)y a broaJer hyaline area around the central nochile; zonal view 

 snbrertangiilar. with rounded corners, slightly nnrrowed at the middle l)y the depres- 

 sion of the centers of the valves; zone or girdle broad and hyaline. 



Lcnt:th of valve, 0.06 mm.; width of valve, 0.0! nun." Costae, 52 in 0.1 mm. 



I have named this minute Xavicula with reluctance, having tried to brirg it into 

 union with several known forms, such as Gomplioncma gracUe nariodoidrs Grun./' or 

 with .Y. tfuella ]5reb. h It could be looked upon as a wide variety of tlio former of these 

 two, which is the same as Gomphoncma naviadoidis W. Smith, if that diatom wore at 

 all like the figure given in Strose,c bnt the identification there is incorrect. The 

 zonal view is beyond ([uestion that of a Xavicula, and Strose shows his doubt of the 

 name by an interrogalion point. My species resend>les somewhat a minute specimen 

 of A', pennata Schmidt,^ but the strictly unbeaded costaeof my species, as well as tlie 

 size, precludesa union. Its nearest representative is an unnamed figureof Schmidt's, -^ 

 which it closely resembles except in the matter of tlu^ npices. 



Type in the U. S. National Museum, No. 5901 14. from station 2680H off central 

 California, October U. 1801: 8G4 fathoms, bottom of brown mud and sand. 



Navicula arenaria Donk. Quart. Tourn. Micr. Sci. n. s. 1: ]0 pJ. I.f, S, ISGl; Brit. 

 Diat. 5C. pi S.f, 5a^c, \%l\-n. Uabh. Fl. Eur. Alg. 1: 177. 18G4. Grun.; 



Schmidt, Atlas pi 47. f. 38-40 (not /. 4t). 187(i. 



/ 



1881'^ O'^feara, Proc. Roy. Irish Acad. IL 2: 411. pi U. f. J7. 1875. Lagers. 

 Bih. Sv. Vet. Akad. Handl. 3'-': 34. 187(1. Lend. -Fort, Mom. Soc. Emul. St. 

 lirieuc 23. 3879, not II. L. Smiih, Sp. Diat. Typ. no. 250. 1874. 

 Naiinda lameohUt Kiitz.; Heve, Sv. Vet. Akad. Ilandl. 27^: 22. 1895. Van Hour. 

 Pynop. 88. 1885. De Toni, Syll. Alg. 2: 58. 1S91. not Cymbella lanceolata C. Ag. 



Although thcro is similarity between certain figures called iV. lanceolata (C. Ag.) 

 Kiitz. and the above species, I find none that can be considered the same. In 

 fact, I am at a loss to decide what this lanceolata of KiUzing is specifically. No defi- 

 nite^ idea can be obtained from the original di'scriptiuns and figuri'ti,/ the figures 

 showing a variety of outlini^s, but devoid of any markings known in Navicula. I 

 notice that Cleve £7 passes overall citations from Kiitzing and apparenth bases his 

 concei)tion of the species on the <lescription and figure in Lagerstedt.^ If so, it 

 is auite irreconcilable with Donkin's species. I think that here, as in some other cases, 

 Cleve has carried condensation beyond the point of usefulness. The spec^imens 

 found by me are so exactly Donkin's type that 1 accept his name as valid. 



Found at station 3G35H, Bering Sea. 



Navicula aspera Khrenb.; Donk. Brit. Diat. 62. pi 10, f, la-c. 1871-73. Van Ileur. 

 Synop. 94. pi 10. f. IS. 1881; Suppl. pi B. /. J(L 1885; Treat. Diat. 205, pi 4-f- 

 165. 189G. Schmidt, Atlas pi 4S. f. 2-6, 21 if. 14-1^ doubtful). 1876. Grun. 

 Denkschr. Akad. Wien 48-: 50. pi 1 . f. 20. 1884. Pant. Beitr. Bacilh Ung. 

 2: 42, pi 10. /. 180, 1889. Schultze, Bull. Torr. Club 14: 70. pi ^^. /. 6. 1887. 



DeToni, Svh Alg, 2: 109. 1S9I. 

 Navicula aspera Ehrenb. Ber. Akad. AViss. Berl. 1841: 20f). 1842, nom. nud.; 

 iMikrog. pi S5A, XX, f, o. 1854, as synonym. 



(/Vanlleur. Synop. pi 24 J- IS. 1881. 

 h\M\ Heur. Synup. pi 7./ 20-21. 1881. 

 ^ Strose, Bacillarienlager pi. 1 . f. 1S\ 21. 1884. 

 cZ Schmidt, Atlas pi 48. f. 41-4S. 1876, 



^Op. cit. pi 46./. 65, 



JC. Ag. Consp. Diat. 9. 1832. Kufz. Bacill. 91. pi 28. f. 38, pi SO./. 48, 1844, 



^Sv. Vet. Akad. llandl. 26-: 1894. 



ftOfv. Ks?l- Vet. Akad. 41^-^: 49. pi 8.f. 5. 1884. 



