156 W. B. TUENEB, FKKNH-WATER ALG.E OF BAST INDIA. 



Long. 18, lat. 15.2 ,«, G. C. W. T. XXI, f. 14 X 1500. 

 .3. 0.? brnnnea, n. sp. Wallich Mscr. No. 348. 



Cell with påle brown mucous contents, »of an oblong form, contained in a pro- 

 per membrane, having 2 orbicular cells placed in the direction of its long axis, which 

 nearly fill up the cntire length, and are pressed closely together at the centre. These 

 cells appear filled with perfectly clear colourless fluid or mucus, and have at their 

 inner margins each a, reddish-brown granular nuclens. Outer cell membrane punctated.» 

 G. C. W. 1. c. 



Long. 88, lat. 27 V- T. XXI, f. 7, after Wallich, X 600. 



Gen. 2. Nephrocytium, Xäg., Einz. Alg. p. 79. 

 1. N. Agardhianum, Näg. 1. c. var. minns, t. III C, f, d e f . 

 Diam. cell. 9 — 12.5 //. 

 Northern India, J. S.; Eastern India, ex Utricularia Jlexuosa, G. v. L. 



Gen. 3. Raphidium, Iutz. Phyc. Germ. p. 144. 



1, R. aciculare, Braun in Rabii. Exs. No. 442; Ankistr odesmus acutissimus, Akcii. in 

 Micr. J. t. XII, f. 44—56, 1862; Closterium subtile, Bkeb. Liste, p. 155, t. II, f. 48; 

 Rhaphidium yolymorphum var. y aciculare, Rabh. Alg. III, p. 45.) 



Long. 35—48, lat, 2—2.5 /<. 



Northern India, 



This little plant is usually (sec. Archer in Mic. Journ. p. 255, 1862) deemed 

 to be the same as Closterium Griffithii Berkeley (Annals v. XIII, p. 256, t. XIV, f. 

 2, 1854), but the latter is much larger, long. 65 — 85, lat, 4 — 5 /', and truly a Clo- 

 sterium. Mr. Archer's views as to the relation of Clos. subtile Brbb. are in all pro- 

 bability correct; but I must, with due deference, doubt Mr. Joshua's observation 

 (Burm. Desm. p. 652) »C. subtile Bréb. Conjugated, with quadrate zygospores», and 

 consicler that Mr. J's diagnosis of the species was in error. 



2. R.? spirale, n. sp. Cellulis longis acutis, spiraliter contortis; in fasciculis conjunctis. 



Long. 32, lat, 2.2 ,«. T. XX, f. 26 X 850; after Wallich Mscr. No. 316. 



Gen. 4. Dictyosphaerium, Näg. 

 1. D. reniforme? Bulnii. in Hedw. II, p. 22, t, II, f. 6; Rabii. Alg. Exs. No. 789; Fl. 

 Eur. Alg. III, p. 47; Archer in M. J. Sci., p. 65, 1868. 



F. major, n. f. 



Cell. long. 25, lat, 9—17 //. Wallich Mscr. No. 332 B. 



Di". Wallich says »A mäss of kidney-shaped cells, some singlc, some double- 

 attached back to back, or having smaller (mes inserted by their oonvex edges into the 

 concavity of the larger ones .... Each cell or double cell is attached to a palepink 

 stan by slender filaments of similar colour». 



T. XX, f. 28, after Wallich. 



[I regret that Dr. Wallich has not figured a whole grou]>, but only a couple 

 of cells; from his description it seems stipitate, and if so it is a Cosmocladium (larger 

 than cither C. pulchellum Bhéb. or C. Saxonicum De Bart)! Should this form even- 

 tually prove to lie a Cosmocladium it might stånd as C. Bulnheimii, Nob.] 



