46 • R. Gronblad, New Desmids. 



Hab. Keuru (C); Messuby near Tammerfors (W). 

 PI. 4 fig. 9—14. 



e) var minneapoliense W o 1 1 e in Bull. Ton-. B. CI. XI (1884) 



page 16; W o 1 1 e, Desm. U. S. (1884) pi. 52 f. 16; West, N.-Amer. 

 (1896) page. 253 fig. xyl. 2. — var. minneap. f. Johnson, New rare 

 Desm. ( 1894) pi. 211 f. 1. — var. johnsonii West, N.-Amer. 1 1896) p. 253 

 [^ v. minn. f. Johns. 1894]. 



The accessory subapical spines were always below 

 (within) the semicircular series of granules. Basal angles 

 with 2 or 3 spines as by var. polymazum, which is closely 

 allied, only differing by the absence of the subapical spines; 

 these spines are also sometimes absent in the one semicell 

 of v. minneapoliense. It would perhaps be better to unite 

 v. minneapoliense with v. polymazum as only a form of 

 that variety. 



Hab. Gov. Archangel. — PI. 4 fig. 15 — 16. 



f) var. basiornatum E i c h 1. & R a c i b., Now. gat. ziel. 

 (1893) pi. 3 f. 31. — Holocanth. antilop. var. fosciculoides, forma, Dick, 

 Siidbayer. (1919) pi. 16 f. 2. 



This variety shows a characteristic outline, the angles 

 being elongated into short mamillate processes, each ter- 

 minated by a straight spine. Isthmus often yellowish between 

 the series of scrobiculations. The centre of the semicells not 

 thickened but furnished with a papilla, which sometimes (rarely 

 only) is grown out into a spine (as by var. canadense Josh.!) 

 ' Hab. Keuru (C), Raisala (SW). PI. 4 fig. 17—18. 



g) var laeve Schmidle, Beitr. Alg. Schwarzw. (1893) pi. 4 

 f. 7; West, Mngr. IV (1912) pi. 109 f. 3; G i s 1 1, Bayer. Hochmoor. 

 (1914) pi. 2 f. 3. 



I have not seen the typical form of this variety, nor 

 any other form with a smooth (not thickened or scrobiculate) 

 central area. But we have in Finland a somehwat larger 

 form with the semicells broadly 6-angulate, the sinus more 

 open, cell-wall smooth but with a (smooth or at the apical 

 part finely punctate) central thickening. This form, which 

 is conspicuously larger than the other ones, would as I 

 think best be placed as a „forma incrassata nov. f." of 

 var. laeve. (Cum. spin. long. 103—110, lat. 103—110, sine 



