MARINE DIATOMS FROM THK COASTS OF ICELAND 359 



Navicula humerosa Breb. Cl. Syn., II, 43; V. H. Trt.,- Tab. IV, 

 flg. 182. 



6 samples (S. 1, S.\V. 2, N.W. 1. N. 2). 

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



Navicula humerosa Breb. var. constricta Cl. Cl. Syn., 1. c. ; Per. 

 D. mar., Tab. XXVII, fig. 21. 



Hafnarfj6r5ur (S.W.;, H. Js. 

 Area: Eur., As. 



Navicula latissima Grun. Cl. Syn., 11,43; V. H. Trt., Tab. XXVII, 

 fig. 762. 



Vestmannaeyjar (S.), H. Js. 

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



Navicula pusilla Greg. Cl. Syn., II, 41 ; V. H. Trt., Tab. IV, fig. 186. 



6 samples (S. 1, S.W. 5). 

 Area : Ubiquist, A. S. 



Naviculae Lyratse Cleve 1895. Cl. Syn., II, 52. 



i 



Navicula abrupta Greg. Cl. Syn., II, 61 ; V. H. Trt., Tab. IV, fig. 162. 



Dyrafjordur (N.W.;, C. H. O., A5alvik (N.W., two samples), Lb. 

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



Navicula abrupta Greg. var. densestriata var. nov. Tab. nost., fig. 9. 

 Long: 32/<, lat: 11 /i, str. 16 in 10 /i. 



Valva linear!, apicibus cuneatis. Areis lateralibus angustis, mo- 

 dice procul ab apicibus terminantibus. 

 AQalvik X.W.), Lb. 



In spite of its small size and close striation this peculiar species 

 shall probably be placed under the form-series of Nav. abrupta, as its 

 short lateral areas especially seem to indicate its place there. 



Navicula forcipata Grev. Cl. Syn.. 11,65; Per. D. mar., Tab. XXI, 

 fig. 28. 



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

 Area: Eur., Afr., Am., Grl. 



Navicula forcipata Grev. var. densestriata A. S. Cl. Syn., 11,66; 

 Per. D. mar. 1. c., figs. 2930. 



IsafjorSur <N.W. , H. Js., A5alvik (N.W.), Lb., Skagafjor6ur (N.), Grid. 

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



Navicula Hennedyi W. Sm. Cl. Syn., 11,57; V. H.Trt., Tab. IV, 

 fig. 160. 



Vestmannaeyjar (S.), H. Js., BuSir (S.W.), H. Js. 

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



