A. CLEVE-EULEK, DIAT. FLORA OF FINLAND. 9 



Caloneis brevis (Grevj. — Syn. Navicula brevis Greg. 

 D. of Clyde, Tab. 9, f. 4. V. H. Syn. Tab. 11, f. 19. 



Foss.: Sat. Panelia {Litorina-deip.); Kk. Knjäsha, rare 

 (Arctic Sea-dep.). 



Distr. {mar.): Greenland, East Arctic Sea, interglacial 

 dep. in Ångermanland, Sweden; ubiquist. 



Caloneis brevis var. vexans Grun. — Syn. Navicula brevis 

 var. elliptica V. H. Syn. Tab. 11, f. 18. 



Fobs.: (locality unknown). (Geol. Commission 1905.) 

 Distr. {mar.): East Arctic Sea, Danmark, Japan. 



Caloneis fossilis n. sp. — PI. 1, f. 4. — Syn. »Navicula 

 consimilis A. S.» Perag. D. France Tab. 9, f. 2. 



Valve linear with cuneate, acute ends, about six times 

 longer than broad. Length 75 [j., breadth 13 |j.. Axial area 

 broad, about Vs of the breadth of the valve, attenuated 

 towards the ends. Central area a broad, transverse fascia 

 with two faint, corroded, elongated markings on both sides 

 of the central nodule. Striae parallel, 14 in 10 \)., crossed 

 by an indistinct, marginal, longitudinal line. 



Foss.: Kk. Knjäsha, rare, {mar.) 



Distr. Balearic Isl. 



This species is well characterised and different from C. 

 consimilis by the broad axial area. It comes probably near 

 to Caloneis latefasciata Grun. (A. D. Tab. 1, f. 21) from the 

 Arctic Sea, a form that has similar markings round the central 

 nodule, but differs by the lateral areas and the broad rounded 

 ends. There is also a general resemblance with Navicula {Pin- 

 nularia?) mesoleia, drawn by Cleve in N. R. D. Tab. 2, f. 26 b. 

 This species, however, is stated by Cleve himself to be identi- 

 cal with Pinnularia molaris Grun. (Syn, Nav. D. II. p. 74), 

 Nevertheless, the original drawing shows rather divergent 

 striae in the ends of the valve and a broad axial area, while 

 Finn, molaris ought to have convergent end-striae and a nar- 

 row or indistinct axial area (Cleve, Syn. Nav. D. II, p. 74). 



Caloneis aemula (A. S.) — Cleve Syn. Nav. D. I, p. 57. 

 — Syn. Navicula subdivisa Grun. A. D. Tab. 1, f. 20. — 

 Icon. nost. PI. 4, f. 75. 



Foss.: Kk. Knjäsha. 



Distr. {mar.): W. and East Arctic Sea, Baltic, Atlantic. 



