KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 



25. x:o 5. 105 



G. S. alteruans, Bréb. (in Ralfs Br. Desm. p. 132, t. XXI, f. 7, 1848; Liste p. 144). 

 Var. minus, n. v. Multo minor quani F. typica. 



Long. et lat, 15, lat, isth. 9.5 /u. T. XVI, f. 6. 



7. S. ochthodes, n. sp. S. parvura, rotundum, paullo longius quam latura; semicellulis 

 late ovatis, sub-rotundatis, ordinibus (circ. 1 2 verticales et 7 transversas) gemmulorum 

 vel granulorum ornatis; sinn profundo, aperto, interne rotundato. A vertice visum 

 triangulare, lateribus paullo incurvatis, angulis rotuudatis; granulis radiatim visis. 



Long. 20—23, lat, 18—20, lat. isth. 7 /u. T. XVI, f. 22. 



8. S. rotundatiun, u. sp. S. submediocre, quinta parte longius qnara latum, clepsydri- 

 forme; semicellula 1 depresso-ovales, dorso truncato-retusse; membrana glabra; sinu lato, 

 aperto, interne rotundato. A vertice visum triangulare, angulis late rotundatis, late- 

 ribus paullo incurvatis. (Xon Stan. (Phycastrum) rotundatum Kutz Sp. Alg. p. 182 

 = Pentasterias margaritacea Ehrb.). 



Long. 38, lat 30, lat. isth. 8 ju. T. XVI, f. 39. 



9. S. microscopicuni, n. sp. S. minutum, tam longum quam latum, semicellulis depresso- 

 elliptieis, dense punctatis (granulatis?) in 3 — 4 angulos sub-rotundate produetis recte 

 vel horizontalitcr positis; semieelluke dorso truneatse vel leniter convexae; sinu aperto, 

 fere rotundato. A vertice visum 3 — 4-angulatiim, lateribus valde concavis, angulis 

 acuto-rotundatis. 



Long. 14, lat. 14—16, lat. isth. 4..1 t u. T. XIV, f. 23. 



This form I have found previously in England (except the 4-angled plant); the 

 Indian and Knglish lönns are alike. 

 K). S. Dickiei, Ralfs (Br. Desm. p. 123, t. XXI, t'. ;',; Lundell Desm. Suec. p. (SO). 

 Var. circulare, n. v. Fröns fere circularis; semicellulse late flabelliformes non sul>- 

 reniformes; sinu triangulari euneato non sub-lineari; aculeis basi non medio latere 

 positis, rectis, non eurvatis ut in f. typiea. Membrana glabra. 



Long. 24—27, lat. 26- 28; lat." isth. K— 9, long. acul. 2 //. T. XVI, f. :>. 



— — f. major. 



Long. 32, lat. 38, lat. isth. 11, long. acul. 3 — 4 u. T. XVI, f. 2."). 



Very frequent in Bengal. 

 11. S. mucronatum, Ralfs (Annals N. H. vol. XV, p. 152, t. X, f. ö, ex. p., a. super, 

 sinistr. et infer. dextr.; Br. Desm. (S dvjeetwni fi et ;') p. 121, t. XX, f. be; Lundell 

 Desm. Suec. p. 59, No. 13; Stan. inrits Jacobs ex. p., Desm. Danmk, t. VIII, f. 26 

 b c, non (Bréb.) Mengh. Synops. p. 228). 



De baryana, Nordst. (St. dejectum De Bary Conj. p. 87, t. VI, f. 25 — 32; 

 Jacobs, 1. c. supra ex. p. f. 2(i); Witt. et Nordst. Alg. Exsicc. Fasc. 11, No. 557, as 

 S. dejeetum fi Debaryana). 



Cellulae plus minus incudiformes. 



Long. 25—28, lat. 30—33 (sp. inel.) lat. isth. 4—5, 1. acul. 5— C ft. T. XVI, 

 f. 20 (b, a vertice, cellula paullo distorta). 



Thisform differs from those of Ralfs ($ aculei parallel, and / aculei convergent), 

 in having the broadest part of the semicell apical and not lateral, and in having the 



K. Sv. Vet. Akad. ITmull. Urnul i."). N:0 5. 14 



