142 W. B. TUKNEK, FKKNH-WATEK ALGiE OF EAST INDIA. 



Long. 7 — 7.5, lat. == lcmg., lat. constr. 3, crass. 4 ju. T. X\'1II, f. IG. 

 Mueh like a small and smooth form of S. excavatum in front view, but in lat. v. 

 it is scen to be less constricted. 



7. S. cosmarioidos, Wallich (Mflcr. Xo. 49, c. icon.). S. magnum, fere dii])lo latins quam 

 longum, in tubo mucoso (45 /u lat.) inclusum; semicellulis longe ellipticis, angulis ro- 

 tundatis, dorso leniter convexis; membrana glabra; incisura mediana profandia ampla 

 interne rotundata. Processus connectentes 2 (3?). Corpus amylaceum unicum in qua- 

 (jue semicellula, 



Long. 13— IG, lat. 24—26, lat. isth. H— 10, crass. 11—12 t*. T. XXI, f. 1, 

 aftcr Wallich 1. c. 



Dr. \V. says, »Filament elongated, joints twice as broad as long or nearly so; 2-lobcd, 

 lobcs frequently unequal! Constriction between lobcs or segments deep; ends df-löbes 

 roundcd; lobes oblong-linear. Joints (fronds) connected bogétner by short hyaline 

 bands or glands, which are as long as broad, and about one-eighth of thc diameter 

 of the breadth of the lobcs. Filament ])ossessing in some stages a mucous sheath 

 about half as broad as itself. The connecting processes are very delicate, and appear 

 to consist not of one picce, but of 2 or 3! but with 7 8 in. objective cannot speak 

 positively on this point. The double or triple naturc of the connecting band would 

 prove the affinity between this and my other néw species Tngöhemk»? (Streptoiwma). 



Raneegunge, Nov. 1855; G. C. W. 



8. S. vinculatum, n. sp. S. mediocre, fere lVo-plo latins quam longuni; semicellulis suIj- 

 reniformibus paullo depressis, lateribus rotundatis, dorso leniter convexis; membrana 

 glabra; incisura mediana profunda angusta lincari extrorsum ;unpliato. A vertice vi- 

 sum ovale. (Jelluhe pulvinibus duplicibus brevibus crassis conjuncta*. 



Long. 11—13, lat, l(i— 17, lat, isth. 3.5—4 ju. T. XXII, f. 18. 



Northern India; J. S. legit. 



S. jiliformi Eiik. proxima; nonne cadem species? Cellulis sejunctis non aj)positis. 

 Vide species seq. 

 0. S. filiforme (Ehhb.) Ralfs (Br. Desm. |>. 209; Cooke Br. Desm. ]>. 5, t. II, f. G; 

 Lundell Desm. Suec. p. 91; Odontella? filiformis Ehrb. Infus. p. 154; Meteorp. p. 12, 

 t, I, f. 20; Tessararthra filiformis. Eiikb. Infus. t, X, f. 21 ; Isthmia filiformis, Menegh. 

 Synops. p. 205; Istkrnosira filiformis, Kutz. Phyc. Germ. p. 141; Sp. Alg. p. 188). 

 S. mediocre, vix lV 2 -pl° latius quam longum; semicellulis ellipticis ]»aullo depressis. 

 dorso leniter convexis, lateribus rotundatis, apieibus proecssubus parvis sub-erectis 

 parum divergentibus obliquiter positis (c (juoque apice duo) munitis; processubus intcr 

 frondes alternatim conjunctis. Frondes non apposita 1 , sejuncta 1 ; processus intervenientes 

 foraminem quasi formantes. Membrana aut glabra vcl in quaque semicellula ordinibus 

 transversis 2 granulorum parvorum ornata; sinn aut fere sequali vel cuneato, amplo, 

 interne rotundato. A vertice visum ovale; a latere biglobulatum, medio modice con- 

 strictum. Filum in tubo mucoso inclusum. 



Long. 13—14, lat. 17—19. lat, isth. 5— G, 1. proc. 3, crass. 8—9 ,«. T. XVII, 

 f. 20, a b X 500; cd X 1000. 



Northern India; with the preceding, No. 8. 



