24 \V. B. TURNER, FRESH-WATER ALGM OF FAST INDIA. 



Gen. 7. Genicularia, De By. 



(De Bary, Conjug. p. 77, t, IV, 1858). 

 No specimen of this Genus has been observed in Indi;i. 



Gen. 8. Gonatozygon, De By. (De By. emend.). 



(De Bary in 'Hedvrigia' I. 1856, No. IG, ex. p. ; Conjug. p. 76, 1858; Leptocystinema, Archer, 



Dubl. Univ. Z. Bot. Assoc. 1858). 



1. 0. Ralfsii, De By. (Conj. p. 76, t. IV, f. 28—25, 1858; G. monotcenium DBy in 



'Hedwigia, No. 16, 1856, ex. p. ; Docidium? asperum, Ralfs' Br. Desm. p. 158, t. XXVI, 

 f. 6 a, b (non c!); Leptocystinema asperum, Archer Na t, Hist. Dubl. Proc., p. 251, 

 t, XI, f. 5, 1858). 



Forma?, a. lams, Nob. Superficies cellularum fere laevis. Archer, Q. M. J. S., 1867, 

 p. 181. 



b. muricata, Nob. Superficies cellul. muricata. Archer, 1. c. p. 198, 1869. 



c. depauperata, n. f. Cellulse tenues, multo graciliores quam in f. typiea; 

 13 — 17-plo longiores quam latse; sa3pe paullo curvatae, dense et subtiliter 

 granulatse; lateribus parallells, apicibus paullo inflatis. T. XX, f. 4. Long. 

 90—120, lat, centr. 7, lat. apic. 8—9 H. 



d. crassa, n. f. Major; crassior quam f. typiea. Superficies subtiliter setosa 

 vel spinulosa; apices leniter infläta?. Spinulis circ. 1.3 ,u long. Long. 

 180—210, lat. centr. 17—19.5, lat. apic. 23—24 ,u. T. XX, f. 6. 



F. typiea and c. near Nilghiri Hills. d. Central India. Forms a. and b. not seen. 

 None occur in Dr. Wallichs gatherings or mscr. notes. 



2. G. Brebissonii, De Bary (1. c. p. 77, t. IV, f. 26, 27; Doc. asperum, Ralfs 1. c. f. 6 c 

 (tig. bad!); Bréb. Liste p. 147, t. I, f. 33, 1856; Lep. Portii, Archer Dubl. Proc. 1. c, 

 t, XI, f. 6; Gon. asperum, auet. recent.) forma gracillima, n. f. G. gracile, angustis- 

 simum, elongatum; cellulis rectis, fusiformibus, diametro 15 — 20-plo longioribus, medio 

 parum tumidis, versus apices sensim attenuatis; apicibus dilatatis, truncatis. Speciei 

 longissima forma. 



Long. 140 — 180, lat, centr. circ. 9, lat. constr. 6, lat, apic. 6.5 — 7.5 //. T. XX, f. 7. 



Central India, 



The forms of this species are analysed by Raciborski (Desm. Nov. Polon. pp. 

 11, 12, 1885). To Mr. Raciborski's remarks I would add that his »forma a Gallicurw 

 is very doubtful, being founded upon the defective figure (6c) in Ralfs! 



3. O. leioderinum, n. sp. G. angustum, sub-curtum, cylindricum, rectum vel leniter cur- 

 vatum, circ. 8 — 9-plo longius quam latum; apicem versus vix contractuin; utroque 

 apice dilatato, truncato. Membrana achroa, laevis. Massa? chlorophyllacese sub-spiraliter 

 ordinata 1 . Habitu G. Ralfsio consiinile. 



Long. 108—130, lat. centr. 14—15, lat, apic. 17—18 ,«. T. XX, f. 5. 

 Near Nilghiri Hills? J. S.; Khasia, on the river Brahmaputra; also East Bengal, 

 from Utricularia fiexuosa, G. v. L. 



4. O. reticulatum, n. sp. G. mediocre, angustum, cylindricum, rectum, 7 — 10-]>lo longius 

 quam latum; apicem versus non contractum, utroque apice dilatato, truncato; mem- 

 brana, sequaliter verrucis minutis acutis reticulatim positis ornata. G. Ralfsio proximum. 



