354 ERiNST 0STRUP 



Navicula Kryokonites Cl. var.? islandica v. nov. Tab. nost., fig. 6. 



Long: 45^, lat: 8 / a. 



Valva anguste-lanceolata. Striis subtilissimis et, qvoad perspi- 

 cere potui, subradiantibus, media in valva fasciam latam relin- 

 qventibus. 



Brokey (S.W.), H. Js. 



It is with some hesitation I refer this form to Nav. Kryokonites 

 Cl. It has no slight outward resemblance to Nav. Kryok. var. subprotracta 

 Cl. (Cl. Syn. I, 109; Cl. Vega Exp., tab. XXXVII, fig. 46) and has also, in 

 common with this, the fairly broad fascia; it differs partly by being 

 somewhat larger, but especially by the very fine striae, which, as far 

 as I could see, are slightly radiate. Nav. Kryok. subprotracta has 22 parallel 

 striae, at right-angles to the raphe, in lO/i, and is found at Cape Ware- 

 karema and off East-Greenland. 



Amphipleura Ktz. 1844. Cl. Syn., I, 125. 



Amphipleura rutilans Trentepohl. Cl. Syn., I, 126: V. H. Trt., Tab. V, 

 fig. 255. (Berkeleya Dilhvynii An.). 



6 samples (S.W. 2, N.\V. 2, N. 2). 

 Area: Eur., Afr., As., Grl. 



Naviculae Mesolejae Cleve 1894. Cl. Syn., I, 127. 



Navicula3 mutica Ktz. forma Cohnii Hilse. Cl. Syn, 1,129: V. H. 

 Trt., Tab. IV, fig. 167. (Nav. mut.). 



Vestmannaeyjar (S.), H. Js. 

 Area : Ubiquist, A. S. 



Navicula (Dickeia) ulvacea Berk. Cl. Syn., I, 129; V. H. Trt., Tab. 

 XXVII, fig. 781. 



Isafj6r5ur (N.W.), H. Js. 

 Area: Eur. 



Naviculae Microstigmaticae Cl. 1894. Cl. Syn., 1,141. 



Naviculas (Schizonema) Grevillei Ag. Cl. Syn., I, 152: V. H. Trt., 

 Tab. V, fig. 243. 



24 samples (S.W. 19, N. 4, E. 1). 

 Area : Eur., As., Am., Grl., A. S. 



In conformity with Cleve 1. c. I include under Nav. Grevillei the 

 following: 



Schizonema apiculatnm Ag. V. H. Syn., Tab. XVI, figs. 4 8. 

 Schizonema comoides Ag. V. H. Syn., 1. c. fig. 3. 

 Navicnla Delognei H. V. H. V. H. Syn., Tab. XI, fig. 13. 



