30 W. B. TURNER, FRESH-WATER ALGJE OF EAST INDIA. 



»Frond linear, sinuous .... Basa] and terminal inflations are the largest. 

 Suture .... plain and slightly protruding. Terminal edge (apex) abruptly truncate 

 ;ind flat, and having round its edge a coronal of minute oval-shaped glands or pro- 

 cesses .... with a central speck on each as if hollow. Colourless or verv påle stravv 

 colour .... Very rare.» G. C. YV. Mscr. Nos. 118 and 121. 



15. D. Wallichianum, n. sp. D. magnum, egregium, circ. 11-plo longius quara latum; 

 margine levissime undulatum, fere rectum; basi valde infiatum. Membrana sub-crassa, 

 glabra; sutura prosiliente; apicibus incavatis et inde expansis, trnncatis, 36 — 40 rugis 

 acutis vel dentibus (adpressis non protrusis) ornatis. Vix attenuatum. 



Long. circ. 750, lat. bas. 68, lat, apic. 54 ,«. T. III, f. 2. 



(Name in honour of Dr. G. C. Wallich; in token of appreciation of his learning 

 and personal worth. W. B. T.). 



16. I), eugeneiim, n. sp. 1). majus, valde elongatum, 16 — 18-plo longius quam latum; 

 margine leviter sinuatum ; basi (et non supra) infiatum; paullulum attenuatum; rectum 

 vel leniter curvatunr, apicibus rotundato-truncatis rugis vel stigmatis pyrifbrmibus 

 20 — 24 preditis; membrana glabra; sutura non? prosiliente. 



Long. 670—720, lat. bas. 28—32, lat. apie. 54 ,«. T. III, f. 3. 



17. I). lJengalense, n. sp. I). permagnum, egregium, crassum, 9 — 11-plo longius quam 

 latins; inflatio basis plus in juvenili segmine quam in maturo protrusa. Apices versus 

 sensim sed paullum attenuatum; ventre paullo tumido; membrana verruculosa; sutura 

 prosiliente; apicibus trnncatis paullo convexis, processubus quadrangularibus 36 — 40 

 instructis. Frondes fila formantes. 



Long. 600—780, lat, bas. 65—70, lat, centr. 69—76, lat, apic. 52 ,u. 



T. III, f. 4 a; b. young (or aborted?) segment (ad nat.); c. showing attacbments 

 when forming filaments of several fronds (after Wallich, x 250). 



Dr. Wallich gives it as »smooth or very minutely granulated», he describes the 

 terminal ])roeesses as »elliptic glands» — the 1 ätter is hardly correct! G. C. W., Mscr. 

 114 and 122. 



Raneegunge. 



18. D. gloriosum, n. sp. 1). longissimum, notabile, circ. 20-plo longius quam latius, rectum, 

 supra tumorem basalem tumöre minore instructum; ex inrlatione basi (usque ad 3 /^ longit. 

 semic.) leniter attenuatum, postea ad apicem expansum. Apicibus trnncatis, processubus 

 conicis 20 — 22 ornatis; sutura non? prosiliente. Membrana paullulum tenuis, lrevis. 



Long. 1000 — 1080, lat, bas. 50 — 53, lat, min. (circ. 3 / 4 long. semic.) circ. .'55. 

 lat, apic. 49 ,«. T. III, f. 5. 



19. D. rejäle, n. sp. I), magnum, egregium, 10 — 12-plo longius quam latins; fere rectum; 

 marginibus leviter undulatum; basi inflatura; membrana crassa, glabra vel subtiliter 

 punctata; sutura prosiliente; apicibus rotundato-truncatis, coronulam elatam dcntium 

 (unaquaque tuberculifera) circ. 24 ferentibus. Frondes vix attenuatae. 



Long. circ. 624, lat, bas. 64, lat. apic. 56, lat. coronulse 48, alt. coron. 11 — 13,". 

 T. III, f. 6. 



Tliis beautiful species seems quite unique in having coronetted apices. The fact 

 of the tubercles being borne upon teeth (or cuneate processes) is notable. 



