48 W. B. TURNER, FRESH-WATEB ALGJE OF KAST INDIA. 



The form has one central inflation alike the normal plant of Bréb. The Swedish 

 form described by Lundell, 1. c, seems to be analogue of the variety of Euastrum 

 turgidum Wallich, q. v., both of which possess 2 tumid central portions; cfr also Racib. 

 Des. Polon. t. XI, f. 9. 



4. C. contractum, Kirchn. (Alg. Schles. p. 147, No. 311, 1878; Colpopelta deplanata? 

 Corda, Obs., p. 241, t, IV, f. 24, 1839). 



Long. 35, lat. 26, lat. isth. 10 ju. 

 32, » 22, » 9 /u. 



T. VII, f. 33, 34, 19. (Vass. 18 u. 



Var. puuctatiim. F. typicae consimilis, sed raulto major, et membrana punctata. 

 Long. 47—52, lat. 35—38, lat. isth. 12—14 /u. T. VII, f. 38; T. IX, f. 21. 

 Bengal, rather common; Northern India. 



5. C. tithophorum, Nordst. (Alg. Nonn. Lugd.-Bat. p. 6, t. I, f. (i, 1880) forma irregnlaris. 

 A fronte visum ut in f. typica, sed differt lateribus sinus irregularibus vel undulatis. 



Long. 21, lat, 22, lat, isth. ,«. T. VII, f. 20. 

 0. C. conciniium (Rabh.) Reinsch. (Euastr. concinnum, Rabh. Alg. Europas, 1204 and 1303, 

 fide Reinsch; Didymidium (Cosm.) concinnum, Reinsch, Algenfl. p. 111, t. IX, f. 3 

 (exel. fig. f?) 1867). 



Long. 15, lat. 12, lat. isth. 3.5 ju. T. VII, f. 21. 



I ara strongly of opinion that this should be named, by priority, C. angulosum, 

 Bréb. (Liste, p. 127, t, I, f. 17) figure ill-drawn; and, again, both have been classed 

 under C. Meneghinii; however, until all their Zygospores are known, thev had better 

 remain separate. 



7. C. heve, Rabh. (Rabh. Fl. Eur. Alg. III, p. 161, 1868) f. minor. Circ. duplo minor 

 quam f. typica; membrana granulata? 



Long. 14, lat, 12, lat. isth. 4 ju. T. VII, f. 22; VIII, f. 21. 



»Distincte granulato»! Rabh. 1. e. The form figured resembles that of Wolle 

 (Des. U. S. A. p. 62, t. XV, f. 10) rather than the ones given by Nordstedt and 

 Wille. The form on T. \ III, f. 21 is also much like Wolle's, but with 'isthmo 

 <t/>t<rto', long. 22, lat, 18, lat. isth. 7 ,u. Since writing these Notes Dr. Nordstkdt in- 

 forms me that Dr. Rabenhorst (in litt.) confirmed his determination of this species, 

 which is often heavily punctate but not granulate. 



8. C. perpastum, n. sp. C. magnum, egregium, fere duplo longius quam latins; sinn breve, 

 lineari. Semicellula^ a fronte visa; rotundo-triangulares, basi infläta 1 ; membrana crassa, 

 punctata; punctis in lineas orclinatis, ut margine radiata visa est. A latere ellipticum, 

 sine constrictione, toto ventre inflato — »peniiforme», quasi ut in specie Penii. C habitu 

 fere C. binervi, Lund. (Desm. Suec. t. III, f. 19) sed differt in medio tumido (a latere). 

 et notis difrerentiis. 



Long. 90—102, lat, 52, lat, isth. 32, crass. 48—52 (after Wallich, Mscr. No- 

 141). T. VII, f. 23. 



»Endochrome frequently in long irregular bands, continuous. Side view elliptical, 

 no constriction visible. This species seems to form the connecting link between Co&* 

 imt ri ii ni ;ind Pen/ii ni . Cos. tu iujid uiii , BrÉB., var. fif> G. C. W. The species certailily 



