KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 8. 59 



Long. 33 — 36 ,"; lat. 27 — 28 ,«; crass. 18 — 23 ,«; lat. istlmi. 7 — 10 fi; lat. s. c. ad 

 basin 18—22 ,«. 



Omatangi (246, 248, 253). 



35. C. nitidulum Denot. Desm. ital. p. 42, tab. 3, tig. 26. 



Long. 35 — 41 fi; lat. 28- — 33 ,«; lat. isthm. 8 — 10 ,«; crass. 16 — 18 ft. Tab. 6, tig. 17. 



Taupo (156); Rotoinahana (316). 



l)uo individuå ex Orakeikorako (n:o 64) membrana margine leviter undulata fortasse 

 huic speciei pertineant, fortasse ad C. Xajgelianum Bréb. vel ad C. transiens Gay accedant. 

 Long. 39 ,u; lat. 34 ,«; crass. 20 ,«; lat. isthm. 11 ,«)• 



Alia forma e Lake Lyndon (20), Tokano (210), Omatangi (248), Orakeikorako (294, 

 299) nonnihil dissimilis est et ad C. subtumidum Nordst. accedit. Quse forma accuratius 

 sit inquirenda. 



36. C. Phaseolus Bréb. in Menegh. Syn. Desm. p. 220. 



(i stigiuosum nov. var. Tab. 3, tig. 14. 



[?G. tetraophthalmum (i Mask. N. Z. D. Add. päg. 243 ex parte, tab. 24, fig. 8 b (non a etc).] 



Forma major, dorso semicellularum altu medio truncato fere ut in y elevato Nordst. 

 (Sydl. Norg. Desm. p. 17, tab. 1, fig. 5), membrana subtilissinie dense punctata et gra- 

 nulis subtilibus minus crebris irregulariter ornata. Zygosporie orbiculares, nigro-brunneae, 

 aculeis longis basi conica excavata densius obsessiu. (Cfr. Wolle Desm. Unit. St. tab. 18, 

 fig. 32). Fortasse propria sit species. 



Long. 38: — 40 fi; lat. 40 — 42 ,u, crass. 22 — 23 ,«; lat. isthm. 18 ,«. Diametr. zygo- 

 spor. sin. acnl. 42 — 46 fi, c. acul. ad 80 fi. 



Omatangi (240, 253). 



The larger puncta of the meinbrane to my eye look like very minute granula and 

 not like depressions, but the smaller ones do. This form very much resembles C. obsole- 

 twu f. inermis, but is smaller and different from the end and side view; the latter spe- 

 cies is without the minute granules on the mendjrane. 



37. C. Scenedesmus Delp. Desm. ital. p. 101, tab. 7, fig. 28 — 34. 



(i dorsitruncatum nov. var. Tab. 3, fig. 15. 



Semicellulai dorso truncatie, membrana subtilissime granulato-punctata. (Nuclei 

 amylacei?). 



Long. 30 — 32 fi; lat. 38 — 42 ,«; crass. 15 — 18 ,«; lat. isthm. 13 — 14 ,«. 

 Omatangi (248). 



38. C. bioculatum Bréb. fi oniphalum Schaars. Magyar. Desm. p. 270, fig. 9. 



Semicellula' basi non reniformes, e vertice visa? verrucis mediauis obtusis. 

 Long. 20—22 fi\ lat. 17—20 fi; lat. isthm. 4- 6 fi; crass. 12—14 ,«. 

 Taupo (164); Omatangi (253, 264). 



