Acta Societatis pro Fauna et Flora Fennica, 49, N:o 7. 43 



singulis pororum ornata. Massa chlorophyllacea axilis la- 

 minis radiatim e centro exeuntibus circiter 12 et nucleis 

 amylaceis permagnis oblongis in utraque semicellula singu- 

 lis. Long. 144, lat. 53—56, apex 23—24, isthm. 49—51 //. 

 [N:o 906].: 



This beautiful large Cosmarium very much resembles 

 C. turgidum var. tinecense Racib., Nonn. Desm. Polon. pi. 

 10 f. 2 but is easily distinguished from that species by the 

 chloroplasts. (In his description Raciborski did not at 

 all mention the chloroplasts, and consequently it must be 

 presumed that they are parietal as in the typical C. turgidum). 

 Compare also C. elongatum Racib., ibid. pi. 1 f. 1 and 

 Dysphinctium grande Delp. var. cuneatum Turner. E.-Ind. 

 pi. 7 f. 5. 



Hab. Lempaala (W). — PI. 7 fig. 61. 



C. cucurbitinum (Biss.) Liitkem.; West, Mngr. I 

 pi. 9 f. 13—14 (sub nom. = Peniam cucurb.) var. grande, 

 nova var. Cellulae multo maiores lateribus subconvexis 

 vel convexis, apicibus valde rotundatis. Membrana subtiliter 

 porosa. Long. 118, lat. 46, isthm. 42//. [N:o 840]. 



This rather large variety is more rounded at the apices 

 than the typical form and more broadly rounded than var. 

 scoticum West. 



Hab. Gov. of Archangel. PI. 7 fig. 62. 



C. cucurbita Breb.; West, Mngr. Ill page 106 — 107. 

 I have here the opportunity to publish a figure of the 

 mature zygospore. The drawing was made by Professor 

 F. Elfving many years ago, but has not been published 

 before now. No measurements were given. — PI. 7 fig. 63. 



C. enontekiense, nova spec. Cellulae minutissimae me- 

 dio incisura late aperta modice constrictae. Semicellulae 

 cuneatae apice recto, angulis rotundatis, lateribus subrectis 

 vel subconvexis. A vertice visum rectangulare lateribus 

 longioribus rectissimis, lateribus brevioribus retuso-emargi- 

 natis. Membrana glabra. Long. 6, lat. 7,3, crass. 3,5, isthm. 

 4,5 fi. [N:o 1235]. 



