60 W. B. TURNER, FRE8H-WATER ALG^E OF KAST INDIA. 



In size and arrangement of the gemmules near to C. ps.^botrytis Gay (Mon. Gonj. 

 I». 61, t. I, f. 18) but it differs much in outline; it is also closely related to the form 

 described by Klebs (Desm. Ost-Preuss. p. 39, t. III, f. 77) as a form of his C. bo- 

 trytis, rnr. A, forma c, the true species of which is doubtful. 



65. C. peregrinum, n. sp. C. sub-mediocre, 4-ta parte longius quam latins, late ovale, pro- 

 funde eonstrietum, sinn aperto extrorsmn fere clauso; semicellulis dolabriformibns, apice 

 rotundatis. Merabrana ventre semicellularum laevis, superiore parte et margine ordini- 

 bus curvatis sub-concentricis verrncarnm (ordines 2 a fronte vis;r) Lnstructa. 



Long. 35, lat, 40, lat. isth. 12 /u. T. VIII, f. 56. 



C. cuneatum Josh. (Burra. Desm. p. 647, t. XXIV, f. 17, 18) seems near to this, 

 but it has only 2 rows of grannles, while this bas (a vertice) 3 rows of verrucae, and 

 is without marginal teeth. 



66. C. innotum, n. sp. C. parvnm, quarta parte longius quam latius, ovale, modice eon- 

 strietum; sina aperto, sub-lineari, asquale, extrorsum ampliato; semieellukv semicircu- 

 lares, basi mocliee rotundata?. Merabrana apud raarginem seriebus duabus concentricis 

 granulorum instrueta, reliqua lasvis. 



Long. 21, lat, 16, lat. isth. 6.5 //. T. VIII, f. 58. 

 07. €. Arnellii, Boldt. (Sibir, Chloroph. p. 107, t. V, f. 15) forma. 

 Long. 55, lat, 47, lat. isth. 20 ,«. T. Mil, f. 60. 



The condensed chlorophyllaceous masses prevented a distinet view of the ventral 

 part of the semicells, hence the superficial markings could not be delineatecl. 



68. C. scenedesnnim, Delp. (Desra. Sub-Alp. p. 101, t, VII, f. 28 — 34) /? punctatum. In 

 sciagraphia consimile, sed minus quam f. typica; merabrana sparse punctata. 



Long. 37, lat, 46, lat, isth. 17 ft. T. VIII, f. 61. 



Very near to Nordstedt's /? dorsitruncatum (Alg. N. Z. p. 59, t, 3, f. 15), but 

 rather larger and not truncate on the upper margins. 



69. €. taxichondrum, Lund. (Desm. Suec. p. 39, t, II, f. 13) var. nudimi, n. v. Paullo de- 

 pressum, minus longe sed latius quam f. typica, cui est consimile, sed angulis basalibus 

 evolutis crassis, merabrana hevi vel subtiliter punctata; granulis ornamentalibus ca- 

 rentibus. Nuclei ainylacei bini. 



Long. 40, lat, 43, lat. isth. 13 fi. T. VIII, f. 64. 



The side view of a frond, long. 47, erass. 26 is shewn at f. 64*. 



70. €. obsoletiun, (Hantzsch) Reinsch (Arths. obsoleius, Hantzscii in Kabh. Alg. Kur. No. 

 1407, sec. Lund.; Didym. (Cos.) obsoletum, Reinsch Algfl. p. 110, t. IX, f. 5). Forma 

 major. 



Long. et lat, 64, lat, isth. 27 //. T. VIII, f. 63. 



This form agrees perfectly with those of Germany and Sweden. 



Lundell (Desra. Suec p. 38) says of the basal angles »niodo non niodo minus 

 distincte acuminati sunt , and it is to be noted that he does not ust' the term aeule- 

 ati»: this testimony, and Reinsch's figure apparently exclude the basally dentiferous 

 forms usually placed under this species. Cfr Xo. 71. 



71. C. palustre, Nob. (C. obsoletum auetorum, non (Hantzsch) Reinsch, nec Lundell, ut 

 supra) (c circulare; p' ovale. 



