42 W. Ii. TURNER, FRESH-WATER AI.ii.K OF KAST INDIA. 



Northern India. 



Near to Dys. striolatum Näg. (Einz. Alg. p. 112, t. VI G, f. 1) and Dys. tesse- 

 latum Delp. (Desra. Sub-Alp. p. 232, t. XXI, f. 13), hut it is smaller than either, and 

 thc segments are attenuate and a little depressed or truncate-rotund at apex. Hans- 

 girg, Prodr. p. 246, makes this sp. a var. Cohnii of his Cosmaridium striolatum, but 

 the arrangement of the granules seems to differ from Nägelis plant, in which the 

 rows of granules are regularly horizontal; efr Nag. t. VIG, f. 1 b. 



13. 1). Willei, n. sp. D. oblongum, mediocre, duplo longius quam latum; semicellulis ova- 

 libus, apice rotundatis; incisura mediana sub-acuta, externe ampliata; membrana granu- 

 lata, granulis in series horizontales (circ. 10) et transversas (eirc. 9) ordinatis. A ver- 

 tice ovale. 



Long. 60, lat. 29, lat. constr. 19—20 ,u. 



T. VIII, f. 40. 



Northern India; Bengal. 



Nearest to Cos. pseudamcenum, Wille (Syd-Amer. Algfl. p. 18, t. I, f. 37, 1883), 

 from which it differs in the cells being larger and more ovate, also in the disposition? 

 of the granules. Name in honour of Dr. N. Wille, the eminent Norwegian Algologist. 



14. D. basidecorum, n. sp. D. minus, fere duplo longius quam latius; semicellulae globosae, 

 basi (in quaque) ordine granulorum (circ. 10 a fronte visorum) decoratae, membrana 

 reliqua la>vi; sinu valde amplo, interne rotundato. A vertice late ovale, fere circulare. 

 Membrana colore pairide fulva-carnosa. 



Long. 34, lat. 18, er. 16, lat. constr. 11 /u. 

 T. VIII, f. 42. 



15. D. qualum, n. sp. D. sub-mediocre, duplo longius quam latum, elongatum, medio 

 paullulum constrictum; in centro la?ve. Semicellul* ovales, granulatae, granulis in series 

 9 latitudinaliter positis, in lineas verticales etiam ordinatis. Sutura amplissima, rotun- 

 data. A latere visum anguste lanceolatum, modice constrictum. 



Long. 40, lat, 20, crass. 12, lat. isth. 16 ,u. 



T. X, f. 9 (after Wallicii, Mscr. No. 158). 



»C attenuatum Brér.?» G. C. W. 1. c. This species appears to be intermediate 

 between Cos. attenuatum and Cos. amocnum Brér. (in Ralfs' Br. Desm. pp. 110 and 

 102), but differs from both in the regularly ovate semicells, the rounded sinus, and 

 in the regularly arranged granules. 

 1<>. I), subconnatum, n. sp. D. mediocre, circ. 1 / 6 pars longior quam latum; ovale, apice 

 late rotundatum; semicellulae fere hemisphaaricae; membrana achroa, glabra. In medio 

 leviter constrictum. Massa chlorophyllacea, in quaque semicellula, radiata. 



Long. 55, lat. 47, lat, constr. 45 ,u (after Wallicii, Mscr. No. 185). 



This form being almost exactly in shape like No. 7 (supra), tliough hardly so 

 rotund or so much contracted, I have not figured it. It is near to Dys. (Cos.) pseudo- 

 connatum (Nordst.) (Desm. Brås. p. 214, t, III, f. 17, 1869), but differs in the smooth 

 membrane and in the endochrome being in one mäss, in each semicell, not in four. 

 17. D. supraconnatum, n. sp. D. sub-magnum, circ. 1',-plo longius quam latum, longe 

 ovale; semicellula' sub-globosa?, regulariter rotundatas; sinu brevissimo, apertissimo; 



