KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:<) 5. 119 



04. S. stellinum, 11. sp. S. magnum, H-plo latins quam longum; semieellul» late cuneatae, 

 dorso paullo convexie, e basi paullo inflatae; angulis 5 longe productis, processubus 

 divergentibus attenuato-sinuatis apice dilatato-trifidis munitis; membrana glabra; sinu 

 vix inciso, amplissimo. A basi visum 5 — 6-gonum, stellatum; juxta isthmum cum 5 

 stigmatibus triplicibus sessilibus ornatum. 



Loug. 60, lat. 90 (c. proc.), lat. isth. 7, long. proc. 34, long. aeul. 5 — 7 /'. T. 

 XV, f, II. 



Central India. 



A peculiar form, apparently between »S^. aspinosum Wolle (Desm. U. S. A. p. 

 14.'}, t. bl, f. 22, 23), and St. platyeérwn Josh. (Burm. Desm. p. 643, t, 24, f. 1. 2). 

 it is smaller and not with spinous or granulate arms, but with basal stigmata. 

 65. S. senariiini (Ehrb.) Kalks (Br. Desm. p. 216, 1848; Desmidium senaHuth Ehr. Verbr. 

 p. 124, t. I\ r , f. 22, 1843; Stephanoxanthium senårium Kutz. Sp. Alg. p. 184. 1849; 

 S. furcatum v. senariwhi auct. nonnull.). 



Long. 34, lat. 26 (s. proc.); long. 46, lat. 50 (c proc.); lat. isth. 11, long. proc. 

 mag. 10 — 13, long. proc. min. 3 — 4 ,«. T. XV, f. 13. 



This form is not uncommon in Bengal, though not noticed by Walligh in Msor. 

 It ap))cars to be mueh smaller than the Swedish plants observed by Llndell, Desm. 

 Suec. p. 67, of which it is to be regretted he did not give a figure. 



Ntite. Wilthout entering into the qncustio vexata whether S. sénarium is or is 

 not a var. of S. furcdtum (Kur.) Breb., the followirig note by Nordstedt is of in- 

 terest: — Cfr. Rabh. Alg. Faiv. No. 2325, *St. furcatum f. triyona; Sandiiem — O. 

 Nordstedt» . . . 'Inter lioc Staurastrum individ ua parcissime occurrunt quoruin semi- 

 cellulae una ad St. spinosum Ralfs altera ad St. senårium Ehr. pertinet.» 

 06. S. nonamiin, n. sp. 8. maguum, paullo longius quam latum (proc. incl.); semicellulis 

 depresso-globulatis, 1:p\ ibus, dorso et ventrc potandatis; angulis 3 — 4, quoque cornubus 

 longis crassis rectis laevibus divergentibus 3 apice furcatis vel fbrci})igeris armato; sinu 

 non profundo, rotundato. A basi et a vertiee visum tri-quadrangulare, processubus 

 9 — 12 ra-diantibus, lateribus valde convexis. angulis acuto-rotundatis vel rectangulo- 

 roturulatis. 



Long. 38—42, lat. 36—40 (s. proc); long. circ SO, lat. circ. 74 (c. proc); lat. 

 isth. 19, long. proc 18—22 ,w. T. XV, f. 14. 



f. minor. Long. 40, lat. 28 (s. proc); long. 48, lat. 46 (c proc); lat. isth. 13, 

 long. proc 12 //. 



Wallich gives: — » 33, » 23 ; » 50, » 53 » ; » 13, 



long. proc. 14—21 ,«, in Mscr. Xo. 213. T. XV, f. 15. 

 — — <Hi;i(lraiii?ulare. Status 4-aiigidatus formae praseedentis. 



Long. 29, lat. 26, (s. proc); long. et lat. 50 (c proc;)'; lat. isth. 14, long. proc. 

 10—12 ft. T. XV, f. 24; XVI, f. 1. 



The forms of this speeies, except the 4-angied one, are exceedingly coinmon in 

 the Bengal distriet. It seems nearest to S. subarnrigeriifä Roy and Bisset (Jap. Desm. 

 t. 269, f. 2), but differs in the deeidedly convex sides in vertical view, while the Ja- 

 panest' plant has »sides concave». Mr. Roy in litt. considers this = St. armigerum 



