14 ERNST 0STRUP 



Var. elliptica var. nov., Tab. nost. I, fig. 13. 



Long: 26//, lat: 7,2 //. 



Valva elliptica, apices subcapitatos versus attenuata. Raphe area 

 hvalina, mediani partem valvae versus patescente, cincta. Stauro 

 satis lato. Striis subtilissimis, radiantibus. 



Hreidarsstaftir (E.) B. P. 



*Var. (jracilis Ehr. Cl. Syn. 1, 147. A. S. All., Tab. CCXLII, fig. 7 

 12. 



Gljufurholtsa (S.) B. P.. Stori Kroppur S.W.) B. P.. Myvatn X.) Rd. 

 Area: Eur., Am. 



Var. hyalina Br. & Per. Cl. Syn. 1. c. Herib. Auv., Tab. Ill, fig. 19. 



4 samples, all E. 

 Area: Eur., Aust. 



*Var. linearis Ehr. Cl. Syn. 1. c. V. H. Trt., Tab. 1, fig. 56. 

 Isafjord (N.W.) B. P., Njardvik (E.) H.Js., Sasvarendi (E.) H. .Is. 

 Area: Eur., Aust. 



Var. siberica Grun. Cl. Syn. 1. c. Cl. & Grim. A. D., Tab. Ill, lig. !>.">. 

 9 samples (S. 2, S.W. 4, E. 3). 



Stauroneis bifissa sp. nov., Tab. nost., fig. 14. 



Long: 34 //. lat: 8 //. 



Valva lanceolata, apicibus productis. Raphe area hyalina, mediam 

 partem valva> versus patescente, cincta. Slauro satis lato, utrisque 

 in lateribus linea singula instructa. Striis inconspicuis. 



Glammarstaclavatn (SAY/, B. P.. Yallanes (E.) B. P. 



Stauroneis elegantula sp. nov., Tab. nost. I, fig. 15. 



Long: 28 //, lat: 5,5 n. 



Valva elliptica, apices capitatos versus attenuata. Raphe area 

 hyalina angusta, mediam partem valvae versus patescente, cincla. 

 Stauro latissimo. Striis inconspicuis. 



Beykholt (S.W.) H.Js. 



Stauroneis Javanica Grun. Cl. Syn. I, 150. Grun. Nov., Tab. I, lii; 

 14. 0st. 0stg. Ferskv., Tab. I, fig. 4. 



4 samples -SAY. 2, E. 2). 



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



In a sample from a valley near Isafjord N.W.) B. P., I have found 

 a Staronc'is javanica of the following dimensions: length 78 //, width 21 //, 

 consequently shorter and comparatively broader than the type. 



Stauroneis Legumen Ehr. Cl. Syn. I, 149. V. H.Trt., Tab. I, iig. 59. 



5 sampk-s (S. 1, SW. 1. N.W. 2, N. 3, E. 1). 

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



