40 R- Grdnblad, New Desmids. 



tass. acet.). Long. 15,8, lat. 13,2, crass. 7,9, isthm. 6 /<. 

 [N:o 1176]. 



Hab. In a basin, Botan. Garden, Helsingfors (S). — 

 PI. 7 fig. 51—52. 



C. regnellii Wille; West, Mngr. Ill pi. 72 f. 25. 

 Forma typica, long. 13,2, lat. 11,9, crass. 6, isthm. 4 u. 

 [N:o 947], 



Hab. Messuby (W). PL 7 fig. 49—50. 



var. minimum E i c h 1. & Gutw., De nonn. spec. p. 164 

 pi. 4 f. 6. The Finnish specimens agreed quite well with 

 the description and figure mentioned, but the size is some- 

 what larger and the apex more retuse. Our figures show 

 the pores (fuchsin^- potass, acet.) and the chloroplasts. Long. 

 14,5—15,8, lat. 13,2, crass. 8—8,6, isthm. 4— 4,6 in. [N:o 1180, 

 1179]. 



Very nearly related is C. regnellii as figured by Hirn, 

 Desm. Finnl. p. 12 pi. 1 f. 14 which most probably is iden- 

 tical to Turner's form, E.-Ind. pi. 7 f. 25. Both these 

 differ by the papilla-like prominence at the centre of the 

 semicells. 



Hab. A basin in the Botan. Gard., Helsingfors (S). — 

 PI. 7 fig. 55-56, 57. 



C. pseudooctangulare, nova spec. Cellulae subparvae 

 medio sinu anguste lineari profunde constrictae. Semicellu- 

 lae subtrapeziformes leviter undulatae, quasi 8-angulatae 

 (inch basi), lateribus divergentibus, 1 dorso late convexo, ipso 

 apice subretuso. A vertice visum rhombiforme angulis ro- 

 tundatis. Membrana glabra. Massa chlorophyllacea — ? Long. 

 24, lat. 20, crass. 11, isthm. 6,e u. [N:o 948]. 



Perhaps nearest to C. laeve var. octangulare (Wille) 

 West, Mngr. Ill pi. 73 f. 20. Compare also C. impressiilum 

 var. punctatum Strom, Frw. alg. Caucasus pi. 2 f. 11. 



Hab. Messuby (W). — PI. 7 fig. 47—48. 



C. miedzyrzecense Eichl. & Gutw., Nonn. spec. nov. 

 pi. 4 f. 9. var. monomazum, nova var. Semicellulae plus 

 distincte trilobulatae subtrapeziformes, apice elongato medio 

 leviter retuso, lateribus e basi primum divergentibus turn 



