76 W. B. TUKNEi;, FRESH-WATER ALGJE OF EAST INDIA. 



well-founded. I hardly think f. 27 can be X<>i;i>stedt's v;ir., as, although the thick- 

 ness is the same, the breadth differs. 

 <>. Eu. clepsydra, Wallich (1. c. page 284, t. XIV, f. 19—21; Mscr. No. 195). 

 Löng. 33, lat. max. 36, lat. isth. 23 it. W. 1. c 



35—38, 8—11, ci-ass. 16 //. T. IX, f. 51'. 



Munguipdre, 20 Oct. 1855, G. C. W. 



This and the preceding species would be, by man}' authors, accepted as Cosma- 

 ria; but the presence of distinct lobes relegates them to this genus. 



7. Eu. nobile, n. sp. E. minns, circ. tertia parte longins quam latum, quadraticum; semi- 

 cellulse late quadratse, angulis superioribus curte lobatse, paullo infläta 1 ; apud apices 

 latissima'; latcribus incisise, bi-emarginaJtae ; apice truncåtae; emarginato-qvadrifidae 

 (emarginationes apicales bi- tri-dentata?); latere et angulis superioribus etiam dent&tse; 

 membrana glabra; sinu profundo, lineari, extrorsum parum ampliato. A vertiee et a 

 latere non cl. Wallichio observatum. 



Long. 20— L>b\ lat, 18—20, lat. isth. 4—5 u (tide Wallich Mscr. No. 206). 



T. X, f. 2 x circ. 700. 



It is to be regretted that Dr. Wallich has not given further details of this 

 beautiful species. Judging from the drawing it appears to have one amylum-corpuscle 

 (large) in each semicell. 



8. E. craciforme, Wallich (Mscr. No. 19N, e. p.). E. submediocre, paulk) longius quam 

 latum, sub-radiatum; semieelluhv trilobatas, valde incisae; lobis lateralibus protentis, 

 apice triangulatis 3-dentatis, apicem versus sparse dentatis; lobis polaribus apice sinuato- 

 truncatis utroque angulo dentatis; semicell ulae in centro annulo granulorum 7 — 8 or- 

 natae; reliqua membrana huvi: isthmo eontracto; sinu triangulari-cuneato, acdto, aniplo. 

 A latere visum semicellulse basi globos;e, supra attenuatae, apice rotundatae. 



Long. 38, lat, 36, lat. isth. 9.5 ,«. T. XI, f. 13. 



This and the succeding species are ncar to E. sphyrvides Nordst. (Alg. N. Z. 

 p. 32, t. 3, f. 3); this one differs in it-s polar lobes, and Xo. 9 seq. also in those lobes, 

 from that species — in this they are truncato-sinuate and inornate, in K. schizostaurum 

 thev are expanded and divided into two parts by a shallow triangulär notch. 

 \). E. schizostaurum, n. sp. (E. cruciatum, Wallich Mscr. Xo. 198, c. p. 1855 ^tton Cos. 

 cruciatum, Brbb. Liste, p. 129, t, I, f. 14). E. submediocre, paullo longius quam 

 latum, stellato-eruciformc; semicellulis trilobulatis, apicibus lobulorum 4-angulatis, an- 

 gulos et marginem dentatis; lobo polari* inciso-quadratico, angulis et marginibus dentato; 

 semicellulse ventre modice tumidaa, annulo granulorum (granula unica melusä) ornatae; 

 sinu cuneato, acuto, modice aperto. A vertiee visum sub-angustc oblongarn, paullo 

 tumidum; a latere bi-globulatum superne capitato-rotundatuni. 



Long. 38—42, lat. 33—37, lat. isth. 9, crass. 14 u. T. XI, f. 12. 



Cfr remarks sub No. 8, to which I would add that tfaese twe Ibnns niuch re- 

 semble in outline (a fronte) a variety? of Ragibohski-s (in Desm. Nov. t. VI, f. 3 b, 

 non a), attributed by him to Eu. bellum Nordst. (Desm. Brås. p. 2 IS, 1. II, f. 6) as 

 var. Ttalicum ejus, but neither a or b can hardly be refcrred to E. bellum; \ i<l<* note 

 sub No. 4. 



