204 Ernst Østrup. 



Trachyneis Cl., 1894. 

 Trachyneis aspera (Ehr.) Cl., var. genuina CL, Cl. Syn., I, 191 ; 

 V. H. Trt., Tab. IV, fig. 165 (Nav. asp.). 



Lo c. OfT Cape Amélie (Algæ). 



Not before recorded from Arct. S. Several other records. 



Trachyneis aspera (Ehr.) CL, var. vulgaris CL, A. S. AtL, Tab. 

 XLVIII, figs. 2—6 (Nav. asp.). 



Lo с. Koldewey Isl. (Algæ). 

 Arct. Dis tr. W. Greenl. 



Trachyneis aspera (Ehr.) CL, var. intermedia Grun., A. S. AtL, 



1. c. fig. 14. 



Lo c. Off Cape Amélie (Algæ, 5 sampl.), Danmarks Havn (Algæ), Off Cape 

 Bismarck (Algæ), Koldewey Isl. (Algæ, 2 sampl.), Marg. of the Pack-ice. 

 Arct. Distr. Greenl., E. of Greenl., East Arct. S. 



Trachyneis aspera (Ehr.) CL, var. intermedia Grun. forma ro- 

 basta. Tab. nost XIII, fig. 3. 



Long. 250 /^. Lat. 38/^, Ser. alveol. 6 in 10/^, alveol. 4 in 10/^. 



Lo c. Off Cape Amélie (Algæ). 



I think this form may be a robust, sculptured Track, asp. intern. Only 

 a fragment found. 



Nayiculæ minusculæ CL, 1895. 

 Navicula bahusiensis Grun., var. arctica Grun. Fz. Js. Ld., 52, 

 Tab. 1, fig. 43. Øst. Mar. D. Østg., Tab. IV, figs. 30—31 (Nav. 

 bahus. Grun?). 



Loc. Dove Bugt. 



Arct. Distr. E. of Green., East Arct. S. 



The present form is identical with the fig. 3L quoted above, in my Mar. 

 D. Østg. As I have there pointed out, шл^ specimens as well as the present 

 form, differ from Grunow's figure of a specimen from Fz. .Is. L., in that the 

 striæ at the apices are not radiate, but almost parallel. As the striæ, 

 however, are seen only with great difficult}^ I think my determination may 

 be correct. 



Naviculæ lineolatæ CL, 1895. 



Navicula ammophila Grun., var. intermedia Grun., CI. Syn., II, 

 30; Grun. D. 0sL— Ung., Tab. XXX, figs. 71—73 (Nav. ammoph. L 

 minuta). 



Loc. Off Cape Amélie (Algæ), Danmarks Havn (Algæ), Koldewev Isl. 

 (Algæ). 



Arct. Distr. East Arct. S. 



Navicula Bolleana Grun., Cl. Syn., 11,25; A. S. AtL, Tab. XLVII, 

 fig. 18. 



Loc. Marg. of the Pack-ice. 



Arct. Distr. W. Greenl., East Arct. S. 



Navicula Bolleana Grun., var. intermedia Øst., Øst. Mar. D. Østg., 

 431, Tab.V, fig. 5. 



