MANN DIATOMS OF Mil. ILBATROSS VOYA 331 



Bhorter, giving thereb der hyaline area around nodule; zonal view 



subrectangular, with rounded corners, slightly narrowed ni the middle by the d< 

 Bion of i he centers of the valves; zone or girdle broad and hyaline. 



Length of valve, 0.06 mm. ; width of valve, 0.01 inn, i 52 in 0.1 ram. 



1 have named this minute Navicula with reluctance, having tried to brirg ii into 

 union with several known forms, sn<-h ;i~ Gomphonema gracih naviculoides Grun 



with A'. h ru l!<t Breb. 6 h could be looked a] as a wide variety of the former of these 



two, which is the same as Gomphoi ■ doidcs W. Smith, if thai diatom w< 



all like th( 31 bul the identification there is incorrect. The 



zonal view is beyond question thai of a Navicula, and 5 >ws his doubl of the 



name by an interrogation point. My sp< ewhal a minute specimen 



of Y. pennata Schmidt, 4 * but the strictly unbeaded costaeof myspecies, as well as the 

 size precludes a union. Itsnearesl representative is an unnamed figure of Schmidt's,* 

 which it closely resembles excepl in the matter of tin- apices. 



Type in the U. S. National Museum, No. 590144, from station 2680H off central 

 California, October 11. L891; 864 fathoms, bottom of brown mud and sand. 



Navicula arenaria Donk. Quart. Journ. Micr. Sci. n. b. 1: 10 pi. I.f.8. 1861; Brit. 

 Dial. 56. pi c. L873 7:'.. Rabh. Fl. Eur. Alg. 1: 177. 1864. Grun.; 



Schmidt, Atlas pi • \0 not/. 41). \^~<>- Van Heur. Synop. pi 



L881?. O'Mea i, Pro. i: Irish Acad. 11. 2: ill. pi. ;.,. /. /;. 

 Bih. Sv. V< t. Al 3 Leud.-Fort. Mem. Soc. Emu 



Briem - i II i. Smith, Sp. Diat. Typ. no. 250. L87 



leve, Sv. Vet. Akad. Bandl. 27 : 2 

 Synop. - De Toni, Syll. Alg. 2: 58. 1891, not Cymbella la 



Although there is similarity between certain figures called N. lai 

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

 1 am at a 1 ide what this lanceolate of Kiitzing is specifically. No defi- 



nite idea can be obtained from the original descriptions and figures,/ the figures 

 showing a variety < t outlines, but devoid of any markings known in Navicula. I 

 notice thai Cle> rail citations from Kiitzing and apparently bases his 



conception of the species on the description and figure in Lagerstedt.* If so, it 

 is quite irreconcilable with Donkin's* I think that here, as 



Cleve has carried condensation beyond the poinl of usefulness Lmens 



found by me are so exactly Donkin's type thai I accepl his name as valid. 

 Found al Btation 3635H, Bering Sea. 



Navicula aspera Ehrenb.; Donk. Brit. Diat. 62. pi. 10. f. la-c. 1871-73. Van Heur. 

 Synop.9 L881; Suppl. pi. B. f. 26. L885; Treal Di 



Schmidt. Adas pi. doubtful). 1876. Grun. 



Denkschr. Akad. Wien 48-: 56. pi. 1. J B84. rain. Beitr. Bacill. I 



2: 42.pl.l0.f.ll 589. Schultze, Bull. Torr. Club 14: 70.pl 

 D< Toni, Syl. Alg. 2: L09. :- 



Ehrenb. Ber. Akad. Wiss. Berl. 1841: 206. 1842, nom. mid.: 

 Mikrog. pi. ".1. XX. f. 5. 1854, as Bynonym. 



n Heur. Synop. pi, L881. 



'• \ Hi Synop. pi :./. W :i. 1881. 



58 l. 

 Miii.lt. Atlas pi 

 ►p. < it. pi I 



I \-. Consp. Diat. 9. L832. Km c Bacill. 94. pi 5 - 



Sv. V.t. Akad. Ilandl. 26 : 1894. 



\kad. 41 : : 19. pi S.J >. I- 



