394 ERNST 0STRUP. MARINE DIATOMS FROM THE COASTS OF ICELAND 



RATTRAY. J. A revision of the genus Actinocyclus Ehr. Journ. Quek. Micr. Club II, 4. 



London, 1890. (Ratt. Actinoc.) 

 SCHMIDT, ADOLPH. Die in den Grundproben der Nordseefabrt . . . cnthaltenen Diato- 



maceen. II. Jahresber. d. Komm. z. Unters. d. deut. Meere in Kiel, Rerlin, 1874. 



(A. S. N. S. D.) 



SCHMIDT, ADOLPH. Atlas der Diatomaceenkunde, Aschersleben 1874 not yet com- 

 pleted. (A. S. Atl.) 

 SMITH. WILLIAM. A Synopsis of the British Diatomacese I II, London, 1853 1856. 



(W. Sm. Syn.) 

 VAN HEURCK, HENRI. Synopsis des Diatomees de Belgique I IV, Anvers, 188085. 



(V. H. Syn.) 



VAN HEURCK, HENRI. Traite des Diatomees. Anvers. 1899. (V. H. Trt.) 

 0STRUP, E. Marine Diatomeer fra 0stgronland. Medd. om Grenl. XVIII, Kjobenh.. 



1896. (0st. 0stg. mar.) 

 OSTRUP, E. Kyst-Diatomeer fra Grenland. Medd. om Grl. XV. Kjebenh., 1898. (0st. 



Kyst. D ) 



EXPLANATION OF PLATE 



Page 



1. Caloneis brevis (Greg.) Cl. var. vexans Grun 350 



2. Diploneis contigua (A. S.) Cl. var. Eudoxia A. S 351 



3. Diploneis notata sp. nov 352 



4. Diploneis? inseqvalis sp. nov 353 



5. Navicula glabra sp. nov 353 



6. Navicula Kryokonites Cl. var. ? islandica var. nov 354 



7. Navicula (Libellus) complanata Grun. var.? 355 



8. Gomphonema kamtschaticum Grun. var. islandicum var. nov. ." 356 



9. Navicula abrupta Greg. var. densestriata var. nov 359 



10. Navicula Lyra Ehr. var. islandica var. nov 360 



1 1 . Cocconeis levis sp. nov 363 



12. Achnanthes islandica sp. nov 365 



13. Nitzschia islandica sp. nov 368 



14. Synedra curvata sp. nov 370 



15. Grammatophora oceanica Ehr. var. macilenta W. Sm. forma arcuata . 373 



