50 W. B. TURNER, FRESH-WATER ALGtM OF KAST INDIA. 



14. C. noduliferum, il. sp. C. parvum, late ovale, long. = l 1 2 -plo lat., incisura lineari, sub- 

 brevi, externe \i\ dilatata; semicellulae sub-quadraticae, angulis inferioribus sub-rotun- 

 datse, superioribus rotundatae, apice leniter rotundatae; margine crenatae; in centro serai- 

 cell. granula (vel nodulus) unica, et in apicali parte rugositatem parvam (duabus gem- 

 inuli.s ornatam) habens. Membrana glabra. 



Long. 21, lat. 14, lat. isth. 5 u. T. VII. f. 27. 



Forma C. crenato Rlfs. proxiraa, sed differt in ornamentis atque insignis semi_ 

 cello lar um. 



15. C. crenatum, Ralfs (Tr. Bot. Soc. Edin. v. 2, p. 151, t. 16, 1844; Br. Des. p. 96, t. 

 XV, f. 7, 1848; non Eu. crenatum, Näg.) t", minuta. Formae typicae consimile sed minus. 



Long. 15, lat. 13, lat. isth. 5 fi. T. VII, f. 28. 



16. C. mordax; n. sp. C. minus, ovale, quarta parte latins quam longum; sinn interno 

 amplo, aperto, extrorsum constricto; semicellulse dolabriformes; angulis basalibus pro- 

 ductis, nasutis; apicibus rotundatis. Membrana laevis vel subtiliter punctata. A latere 

 fere biglobulatum. Forma' suturae et partium semicellnlarum adjacientium (a fronte) 

 fere maxilliformes sunt; ex quo nomen. 



Long. 31, lat. 42, lat. isth. 13 «. T. VII, f. 2!). 

 » 30, » 36, » 9 //. T, IX, f. 7. 



Nearest to C. pseudotaxichondrum Nokdst. (Alg. Brasil. p. 20, t. 2, f. ö, 1K77; 

 Wolle, Desm. U. S. A. j>. 71, t. L, f. 22, 23) but possesses none of the markings or 

 that species, the granules being absent. 



17. C. Bissetii, n. sp. Cos. mediocre, paullulum latins quam longum; semicellulis quadrato- 

 depressis, angulis rotundatis, apicibus paullo incurvatis, sinn sub-lineari, extrorsum 

 ampliato. Membrana achroa, centrali parte laevi, a fronte \ isa seriebus 1 1 radiantibus 

 granulorum (in quaque circ. 6) ornata. 



Long. 36, lat. 40, lat. isth. 14 //. T. VII, f. 30. 



Only one specimen of this prettv form was seen. In front view it is much like 

 Cos. Broomei Thwaites (in Ralfs 1 Br. Desm. p. 103, t. XVI, f. 6, t. XXXIII, f. 7). 

 but the ornamentation is totally different. 



I have much pleasure in associating the name of Mr. J. P. Bisset, a Scottish 

 Desmidiologist, with this speeies. 



18. C. auriculatum, Reinsch (Contr. Alg. p. 83, t. XIV, f. 5, 1875). 



a. Long. 43, lat. 50, lat. isth. 17..";. Membrana punctata, non verruculosa; fusco- 

 luteola. Forma paullo depressa. T. VII, f. 35; also Wallich Mscr. No. 166, 167. 



(1. verrucosum. Long. 42 — 50, lat. 50 — 55, lat. isth. 21, crass. 22 it. Membrana 

 luteola; distincte verrucosa, verrucis concentrice ordinatis; angulis basalibus 4 — 5 

 spinulis armatis. T. IX, f. 8 a. 



The segment marked 8 a 1 is punctate; perhaps young? This species is verv eom- 



iniiii in Benjral; membrane af\va\s more or less coloured. There are two 'nuclei amy- 



lacei' in eaeh semicell. 



19. C. pygmaeum, Archer (Descr. p. 174, t. VI, f. 45—49, 1864). 



Long. 9, lat. 10, lat. isth. 3 /'. T. VIII, f. 17. 

 » 12, » 13, » » 5 /u. » 20. 



