54 w. B. TURNER, FRESH-WATER ALG2E QE EAST INDIA. 



This is near to l>ut not quite the species referred to; possibly however an al>- 

 errant variety. 



35. <'. apertum, n. sp. C. submediocre, late ovale quinta parte latins quam longum; semi- 

 cellulaa latissimae flabelliformes, angulis basalibus subito rotundatae, dorso late rotundo; 

 sinu profundo, amplo, cuneiforme; membrana Iasvi. A vertice visum ovale. 



Long. 30, lat. 37, lat. isth. 9 .«. T. VIII, f. 11. 



C. tithophoro Nordst. (Alg. et ('har. p. 6, t. I, f. 6) proximum, sed differt in 

 medio semicellularum non protruso. 



36. C. bicrmatuni, n. sp. C. mediocre, tertia parte longius quam latum; late ovatum, sinu 

 lineari, profundo, extrorsum ampliato; semicellulse basi f'ei'e rectae, apice rotundatae, 

 margine muricato-crenatse; granulis marginem versus binatim positis ornat*. Granula 

 ad basin semicellularum in series 6 verticalés disposita. G. specioso Lund. (Desm. Suec.) 

 a biformi Nordst. (Desm. Spetsb. p. 30, t. \ T J, f. 11) proximum, sed minus et differt 

 isthmo, forma semicellularum, et dispositione granulorum. A vertice visum ovale, tu- 

 möre mediano truneato praeditum: a latere ovato-lanceolatum. 



Long. 44, lat. 32, lat. isth. 12, crass. 23 ". 



T. VIII, f. 13 (also Wallich, Mscr. No. 136). 



»The endochrome often sends oft' radiated processes, and then appearS itself radi- 

 ated. About 25 crenatures on each segment,» G. C. W., 1. c. Dr. Wallichs drawing 

 shows 21 creme. mine only 17. There are 2 cell-nuclei (pvrenoids) in each semicell. 



37. C. cycladatum, n. sp. C. mediocre, tertia parte longius quam latum, late ovatum; semi- 

 cellul» semicirculares, sub-reniformes, margine granulo-crenatae, granulis singulis mar- 

 ginem versus radiatim positis ornatae, centro glabrae. Sinus linearis, profundus, extror- 

 sum ampliatus. 



Long. 44, lat. 30, lat. isth. 8 u. T. VIII, f. 12. 



C. specioso f> simplici, Nordst. (Des. Spetsb. p. 31, t. VI, f. 12) proximum. sed 

 differt forma semicellularum, et isthmo. [I fail to see why some authors have classed 

 C. speciosum as a Dysphinctium, the sinus though shallow is lineari] 



38. C. punctulatuni, Bréb. (Liste p. 129, t. I, f. 16, 1856) var. depressum. n. v. Semi- 

 cellulaa (atque fröns) depresso-ovales, lateribus rotundatse, dorso leviter curvatae; sinu 

 sub-lineari, externe ampliato. Membrana concentrice granulata (non punctata ut in 

 forma typica). 



Long. 24, lat, 24, lat. isth. 8 ,". T. VIII, f. 16. 



This is much like Klebs' form (Desm. Ost. Pr. p. 37, t. III. f. 50, which is lat. 

 and long. 28 «, and is unlike the form of Brebisson f. 51 1. c. 



- forma /? rotundatum, Klebs (1. c. f. 54). Specimina Indica paullo maj or a 

 sunt; granulata. 



Long. 40, lat. 84, lat. isth. 10 ,«. T. VIII, f. 53. 



Rkinsciis form from the C. of Good Hope (Linn. Soc. Journ. XVI, t. \ I, 1. 7) 

 is much like this, hut smaller, 25x22 a. 



Var. Klebsianum (forma sub />' rotundatum Klebs, 1. c. I'. 52; 1. 20, It. 16 "). 

 Var. minor, compressa; apicibus rotundatis, caeteris ut in f. typica, sed granulata. 



Long. 28, lat. 19, lat. isth. 8 M- T. VII, f. 'M. 





