10 R. Gronblad, New Desmids. 



U. S. pi. 16 f. 10; E. abruptum Ndt. 1. c. pi. 2 f. 3 and 

 Borge 1. c. pi. 4 f. 23. 



Hab. Messuby near Tammerfors (W). — PI. 2 fig. 

 17—19. 



Eu. turnerii West, Mngr. II pl. 37 f. 9—10, forma 

 fennica nova f. Cellulis minoribus, in tumore centrali gra- 

 nulis 4 oblongis-arcuatis, supra earn utrimque scrobiculis 

 binis ornata. Long. 37, lat. 29, isthm. 7,9 u. [N:o 965]. 



Nearest to f. bohemica Lutkem. (Desm. Bohm. pl. 2 

 f. 2) Compare also „Eu. sp. ad E. denticulatum et E. binale 

 accedens" Nordst. (N-Zeal. pl. 3 f. 11), which form is 

 already referred to this species. 



Hab. Messuby near Tammerfors (W). — Pl. 2 fig. 16. 



var. karelicum, nov. var. Cellulae lobo polari interdum 

 cum lobis lateralibus fere confluenti. Lobi laterales non 

 bipartitae sed dentibus tribus rotundatis (non acutis) tri- 

 undulati, undula suprema ceteris maiore. Membrana supra 

 tumorem centralem scrobiculis 4 (utrimque 2) perforata. 

 Long. 40, lat. 28,5, crass. 16,i, isthm. 8 //. [N:o 798]. 



Nearest to f. bohemica Liitk. and f. fennica nob. but 

 sufficiently characterized by the lateral lobes. Compare also 

 E. denticulatum ft elongatum Nordst., N-Zeal. pl. 3 f. 10 

 E. denticulatum f. Ndt. ibid. pl. 3 f. 9. 



Hab. Gov. of Archangel. Pl. 2 fig. 22—23. 



Eu. boldtii S c h m i d 1 e, Beitr. Alp. Alg. pl. 16 f. 45. 

 (Synon. =E £. denticulatum f. Boldt, Desm. Gronl. pl. 1 f. 9). 

 Bene cum figuris supra citatis congruens, sed granulis 

 paucioribus. Long. 30—32, lat. 23—25, ist. 6 fi. [N:o 807 b]. 



I fully agree with Sen mi die (Nuova Notarisia 1897 

 p. 64) in making B o 1 d t's form a separate species. It is a 

 well marked species not to be confused with E. denticula- 

 tum of which West thought it to be merely a common 

 form. 



Hab. Gov. of Archangel. Pl. 2 fig. 10—11. 



var. isthmochondrum, nova var. Cellulae minores tu- 

 more centrali granulis 3 (vel verruca subcirculari) ornata, 

 ceterum serie simplici granulorum intra margines, praeterea 



