214 Kunst Østiu r. 



Loc. OirCnpo Amélie (Alj^æ), Dnmiiniks Havn (AIj^:c, 2 sarnj)!.), Knldewey 

 Isl. (Al<^;v, I sampl. I. 



Arrt Di Str. ('.refill., l-:ast Arci. S. 



Cocconeis costata vnr. paci/ica Grün., V. H. Syn., Tab. XXX, 

 figs. 13 14. 



Loc. Danmarks Havn (Algæ). 



Ard. 1) i st r. Ci recul. 



Cocconeis ornata Greg? cl". Grog. D. Clyde, 19, Tab. I, lig. 24. 

 Tab. nost. XIII, Fig. 14. 



Long 32«. Lal. 1()//, coslis 8 in 10«, utrisqve in valvis. 



Valva elliptica, area apicali dislincla. Coslis leniter radianlibus, 

 in Hypotheca vitla submarginali niida inteiruptis. 



Loc. Koldewey Isl. (Algæ). 



This species mav be (Iregorys Core, annua, although Gregory (I.e.) des- 

 cribes the apical area as a "long lanceolate blank space" and figures the striae 

 as strongly radiate towards the apices. Cleve (Syn. 11, 171) mentions Cocc. 

 ornata as a form which possibly may be a variety of Cocc. Scutelluni Ehr., 

 but in this matter I cannot agree with him. Cocconeis ornata occurs in 

 "Lamlash Bay" and in "Loch Fine.'" 



Cocconeis sp. Tab. nost. XIII, fig. 17. 



Long. 31«. Lai. 20«. Sir. 11 in 10«, ad marginem numeralis, 

 delicatissime punclatis. 



Hypotheca: "Valva elliplica. Raphe area angusla dislincla, media 

 in parte valvæ in aream parvulam centralem acuminatam dilatata, 

 cincta. Slriis ubiqve in marginem perpendicularibus. Nodulis ter- 

 minalibus paululum ab apicibus remotis. Hypothecam modo ob- 

 serva vi. 



Loc. Koldewey Isl. (Algæ). 



As 1 have only seen the hypotheca 1 have not given this form as a new 

 species. 



Achnanthes Borg., 1822, 

 Subg. Ileicroneis CI., 1895, pro. gen. 

 Achnanthes hyperborea G run., CI. Syn., 11,183: Grun., Fz. Js. Ld., 

 Tab. I, figs. 4—5. Tab nosl. XIII, fig. 15. 

 Loc. OfT Cape Amélie (Algæ). 

 Arct. Distr. Franz-Josef Land. 



Subg. Microneis CI., 1895 pro. gen. 



Achanthes debilissima sp. nova? Tab. nost. XIII, fig. 24, cf. 

 Grun., Fz. Js. Ld., 52, Tab. I, fig. 42 (Navicula debiliss. Grun.). 



Long. 6,3— 7«. Lat. 2,7«. 



Valva elliplica. Slriis perdifficiliter perspiciendis. 



Loc. Koldewey Isl. 1 2 sampl). 



This hyaline and exceedingly small species may be identical with Na- 

 vicula debilissima Grun. Grunows figure shows both the terminal nodules 

 and a central nodule and the latter he describes in the text (1. c.) as "minu- 



