34 H. Gronblad, New Desmids. 



nucleis binis axilibus et foliolis parvis in omnes ordines ex- 

 euntibus composita. Long. 48, lat. 40, crass. 23, isthm. 13//. 

 [N:o 975]. 



This species should be compared with C. trachupleurum 

 v. stellatum Racib., Nowe Desm. pi. 5 f. 24, which differs 

 with its granulation. Compare also C. nodosum f. stellata 

 Eichl. & Racib., Now. Gat. ziel. pi. 3 f. 1. 



Hab. Messuby (W). — PI. 6 fig. 35—37. 



C. turpinii Breb. var. eximium West, Mngr. Ill pl. 

 83 f. 3; Borge, Torne-Trask pl. 1 f. 19 („f. minor"). Long. 

 55—59, lat. 46—50, crass. 27, isthm. 9—11 u. [N:o 1232]. 



This variety is possibly very closely related to Euastrum 

 occidentale West (Mngr. II p. 67—68 pl. 39 f. 20). The 

 Finnish form is very like the Swedish. Borge has sug- 

 gested the relationship between E. occidentale and C. turpi- 

 nii (Regnell, Exp. page 99) Again, the typical C. turpinii 

 differs considerably, whereas this variety much more re- 

 sembles E. occidentale than C. turpinii: the single central 

 tumour, the finer granulation, the side view are not those 

 of C. turpinii. (Our figure of the vertical view differs a 

 little from West's" figure). Finally, it should be noticed 

 that the chloroplasts are similar to those of E. verrucosum 

 (Cfr. Carter, Stud. Chloropl. I page 245). 



Hab. Esbo (S), leg. C. Cz. Pl. 7 fig. 64—66. 



C. rectangulare Grun. var. eichlerianum, nov. nom. 

 (Syn. = C. rectangulare apud E i c h 1 e r, Mat. Plor. Miedz. pl. 

 1 f. 8). Differt a forma typica angulis inferioribus plus ro- 

 tundatis, lateribus plus convergentibus, angulis superioribus 

 granulis singulis parvis instructis, apice rectissimo; a vertice 

 visum cellulis ellipticis. Long. 36, lat. 27, crass. 17, isthm. 

 10//. [N:o 935]. 



Would perhaps better be regarded as a separate species. 

 Compare also C. retusiforme f. ornata E i c h 1. 1. c. pl. 3 

 f. 29. 



Hab. Keuru (C). - Pl. 7 fig. 1-3. 



C. tetrachondrum Lund., Desm. Suec. pl. 3 f. 2. 



