74 W. I!. TURNER, FliKSIl-WATKli ÄLGiE OF KAST IXDIA. 



Section II. Frond biglobate; 



Sub-gen. D. Sptaaeridium (aifci/Qa = globus). Semiceils nearly or quite globular. 

 Typ. sp. C. rnoniliforme, praegrande, globosum. 

 Section III. Frond angular, or angularly rounded. 



Sub-gen. E. Tetridium (rttpa =- quatuor). Semiceils more or less quadrate. 



Typ. sp. C. conspersum, Broomei. 

 Sub-gen. F. Gonatidinm (yoovta == angulus). Semiceils 6- or poly-angular. 



Typ. sp. C. sexangulare, Meneghinii, ex p., protractum, Sinostegos. 

 Sub-gen. G. Teinidium {tuvco = produco). Angles produced at either the apex or 

 base of the semicell. 

 Typ. sp. C. porrectum, pileigerum. 

 Of this latter subgenus two sections rnight be made, one to include species like 

 C. porrectum, the other iniglit erabrace such plants as C. pileigerum, Kan/t://, pseudo- 

 taxichondrum, obsoletum, etc. 



Gen. 16. Euastrum, Ehrb. 



(Al)h. Berl. Akad. p. 82, 1831, mut. char.; Ralfs, emend. Br. Desm. in Annals p. 187, vol. XIV, 1844: Br. 

 Desin. p. 78, 1848, et auct.; inclus. Eucosmium, Näg., Einz. Alg. p. 120, 1849 = Didymidii sub-gen. Réinsch 



Alg. Frank. p. 122, 1867). 



1. E. snbintegram, Nordst. (Desm. Brås. p. 216, t. II, f. 8), var. Indien m. E. in scia- 

 graphia fere ut in specie Nordstedtii sed paullo majus, juxta istlnnum tumoribus 

 (granulatis vel punctatis?) parvis et paullo supra tumöre majoré instruetum. Mem- 

 brana punctata. 



Long. 60, lat. 40, lat. isth. 10 ,«. T. VII, f. 17. 



2. En. verrucosum, Ehrb. (Abh. Berl. Ak. 1888; Inf. p. 162, 1838; Cos. cörnutum, Corda, 

 Alm. Carlsb. Obs. p. 243. t. V, f. 30, 1839; Cosm. verrucosum, Mfathi. Synöps. p. 222, 

 1840; Euast. papulosum, Kutz. Phyc. Germ. p. 135, 1845; p. 172 Sp. Älg. 1849). 



«. typicum. Speciminibus Europseis consimile. 



(i. Wallichianum, Nob. = var. (i Wallicu (Beng. Desm. p. 282, t. XIV, f. 5 — 7). Long. 

 75—79, lat. 74—80, lat. isth. 28, crass. 35—38 ,«. Var. lobulis valde incisis 

 (Wallich, Mscr. No. 197). T. XI, f. 9. 

 y. simples, Josh. (on Desm., J. Bot. 1885, p. 34, t. 254, f. 2), forma tumescens, n. f. 

 Simplex, vix lobatum, apice sub-acuto incavatum, apud angulos superiores rotun- 

 datum; margine apicern versus iriciirvata; superficie dense verrucosa, tumöre cen- 

 tral] unico ornata. 



Long. 80, lat. 78, lat. isth. 21 ,«. T. XI, f. 9*. 

 Hah. fi, Bengal; a and y, Northern India. 



It is noteworthy that while all other forms of E. verrucosum fall under tlio sub- 

 genus Eucosmium (cfr Näg. Einz. Alg. p. 120), the var. of Wallich is deeply incised 

 at the apex — this causes some doubt as to its really being a true variety of E. verru- 

 cosum. 

 8. E. turgidum, Wallich (Desm. Beng. p. 288, t. XIV, t'. 17, 18, 1860). 

 «. typienm, Wallich 1. c. 





