KONGL. SV. VET. AKADEMIENS HANDLINGAR. RAND. 25. N:0 5. 63 



versus verrucis sub-quadraticis, circ. 18 in quaque semicellula, et centro granulis circ. 

 7 annulo dispositis, 2 — 1 granulis cingentibus, ornata. Sinn profundo, sub-lineari, 

 extrorsum ampliato. A vertice ovale, centro paullo tumiduin. 



Long. 54, lat. 43, lat. isth. 12 fi. T. IX, f. 17. 



Probably nearest to the form of C. Ungerianum (Xäg.) Archer described by 

 Reinsch (Contr. Alg. Fung. p. 84, t. XVI, f. 6) as Cos. oligogongrus] it is also close to 

 C. gemmatum, Xob. (On Desm., p. 935, t. XVI, f. 5), [which is not, pace Wolle = 

 C. triplicatum ejus (Desm. U. S., t. XIX, f. 3 — 6), as the centre of semicell is doubly 

 tumid: efr his f. 6, basal view of conjugating semicell!]; and to C. nodosum, Anders- 

 son (Chloroph. Roslag, p. 14, f. 8). From all these it differs in man v points of detail. 

 That acute observer Dr. O. Xordstedt asks, in litt., »Are the crenae at the margin 

 reallv such as in the inner series?» I think not, the marginal elevations being rounded 

 at apex, while the infra-marginal verrueae are distinctly truncate or rotundato-truncate 

 at their apices. 



Northern India. 



82. C. siibqiiasillus, Boldt. (Desm. Grönl. p. 25, t. I, f. 25) var. tropicum, n. v. C. ovato- 

 depressum, paullo longius quam latum; semicellulse cuneato-depressae, marginein versus 

 ordinibus 4 granulorum radiatim (usque ad 30 series) positis; centro tumido granulis 

 magnis et parvis irregulariter sparso. Paullo minor quam f. typica. 



Long. 64, lat. 60, lat. isth. 18 /u. T. IX, f. 15. 



In the typical form the radiating granules form about 20 series, the size being 

 equal; in this there are about 30 series, increasing in size from the interiör to the 

 margin; the mixture of large and small granules in the centre is noteworthy. 



Central India. 



83. Cos. sp. C. Cos. Iceri Rabh. (1. c.) propius, sed glabra. 



Long. 23—29; lat. 22—26; lat. isth. circ. 10, crass. circ. 14 ,u. T. IX. f. 16. 

 About twice the size of Xo. 7; membrane smooth. Wallich Mscr. No. 126, from 

 which the hgure is taken. 



84. C. Tittaghurense, n. sp. C. minutum; ovale, fere latum quam longum; semicellulge 

 acuto-ovales, latere acuto-rotundatas; membrana lajvis; sinn aperto, externe ampliato. 

 Semicellula' a vertice elliptica?; a latere fere orbiculares, incisura mediana late incurvata. 

 Zygosporce glabra-, orbiculares, membrana erass;t. 



Long. 13, lat. 12, lat. isth. 3, crass. 8, diam. zyg. 13 «. 



T. IX, f. 19 (after Wallich Mscr. Xo. 165). 



Apparentlv between C. tinctum, Rales and C. bioculatum, Breb., from which it 

 is separated by the acuto-rotundate sides, the sub-triangular sinus, and the globose 

 zygospore. 



Tittaghur. 



85. C. medioglabruni, n. sp. C. minus. circ. quarta parte longius quam latum, angulato- 

 ovatum; semicellula' sub-hexagona3, angulis modice rotundatae, inargine acute crenatae, 

 apice truncato-crenata'; membrana in centralem partem frondis glabra, latera versus 

 subtiliter granulata; sinn lineari, sequale, extrorsum ampliato. A vertice visum ovale. 



Long. 18, lat. 14, lat. isth. 4 u. T. IX, f. 20. 



