360 ERNST 0STRUP 



Navicula Hennedyi W. Sm. var. circumsecta Grun. Cl. Syn., II. 58; 

 A. S. N. S. D., Tab. I, fig. 42. (N. polysticta var. circ.) 



Vestmannaeyjar (S. , H. Js. 

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



Navicula Lyra Ehr. var. atlantica A. S. Cl. Syn., II, 63; A. S. N. S. D., 

 Tab. I, fig. 34. 



Isafjor5ur (N.W.), H. Js. 

 Area: Eur. 



Navicula Lyra Ehr. var. Ehrenbergi Cl. Cl. Syn., 1. c. ; V. H. Syn., 

 Tab.X, fig. 1. 



Isafjordur (N.W.), H. Js., Dyrafjor5ur (N.W.) C. H. O. 

 Area: Ubiquist, Grl., A. S. 



Navicula Lyra Ehr. var. islandica var. nov. Tab. nost. , fig. 10. 

 Long: 43 //, lat: 21 //, str. 11 in 10 //, subtiliter punctatis. 

 Valva lineare-elliptica apicibus rotundatis. Areis lateralibus an- 

 gustis, usqve ad apices pertinentibus ibiqve convergentibus. 

 A5alvik (N.W.), Lb. 



This form does not correspond completely with any of the numerous 

 previously described variations of Nav. lyra. It differs from var. elliptica 

 by being more finely striated; from var. atlantica by the lateral areas 

 almost reaching the apices, and from var. Ehrenbergi by the lateral 

 areas converging at the apices. Perhaps it is most closely allied to Nav. 

 lyra var. granulata Per. from la Manche, delineated, but not described 

 in Per. D. mar, tab. XXIII, fig. 5. 



Naviculse Laevistriatae Cleve 1895. Cl. Syn., 11,66. 



Navicula elegans W. Sm. Cl. Syn., 11,68; Per. D. mar., Tab.X, 

 fig. 25. 



4 samples (S.W. 3, E. 1). 

 Area: Eur., Afr., As., Am. 



Navicula palpebralis Breb. Cl. Syn., 11,70; V. H. Trt, Tab. IV, 

 fig. 175. 



7 samples (S. 4, S.W. 2, N.W.I). 

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



Navicula palpebralis Breb. var. angulosa Greg. Cl. Syn., I.e.; 

 Per. D. mar., Tab. X, fig. 22. 



Hvammsfj6r5ur (S. W.), H. Js. 

 Area: Eur. 



Pinnularia Ehr. 1843. Cl. Syn., II, 71. 



Pinnularia qvadratarea A. S. Cl. Syn., II, 95; V. H. Trt., Tab. XXV, 

 fig. 704 (Navicula qv.). 



