CLOSTEKIUM. 369 



rium : it is most probable, however, that that species ought 

 to be referred to the latter genus. 



a. Closteria curved, smooth, not appendaged. 



1, CLOSTEKIUM EHRENBERGII Menegh. 

 Plate LXXXVII. Fig. 1. 



Char. Frond semilunar, thinned, and rounded at the ex- 

 tremities. Granules scattered. Endochrome fasciated. 

 Bands two or three in each segment. 



Der halbe Mond, Eichorn, Kleinste Wassenthiere, p. 48. 

 taf. 5. fig. c. 1775, 1781, 1784. Vibrio Lunula Muller, 

 Naturforscher, 20. p. 142. 1784. ; Herman (after Mul- 

 ler) ebenda, p. 169. taf. 3. fig. 59. V. Lunula Muller, 

 Animalc. Infus. p. 55. taf.vii. figs. 13. and 15. 1717? Mul- 

 leria? Lunula Leclerc, 1802 ? Conferve inedite, No. 77. 

 (Zygnemadeciminum) Gerod Chantrans, Recherche sur les 

 Conferves, t.33. 1802. Mulleria Lunula Schrank, Fauna 

 boica, iii. 2. p. 47. 1803. Closterium Lunula Nitzsch, 

 Beitrage, f Infusarienkunde, 60. and 67. 1817? Vibrio 

 Lunula Gruithuisen, Acta Nat. Curios, x. 2. p. 449. 

 1821. cfr. Cl. moniliferum. Bacillaria Lunula, Acta Nat. 

 Curios, xi. 2. p. 533. 1823. Lunulina vulgaris Bory, 

 Encyc. Method. 1824, and in Diet. Class. d'Hist. Nat. 

 1826. Lunulina vulgaris Turpin, Diet. d'Hist. Nat. 

 Planches Vegetaux, i. p. 3. 1828. Closterium Lunula 

 Hemprich et Ehrenberg, Symbols Physicae, Ever- 

 tebrat. i. Phytozoa, tab. ii. iv. fig. 6. 1828. Closterium 

 Lunula, Isis, 1830, p. 168. Closterium Lunula, Abhandl. 

 der Academic d. Wissensch. zu Berlin, 1829, p. 7. 15. 

 1830, p. 40. 56. 62., 1831, p. 67. Closterium Lunula, 

 Symbols Physics, text 1830 (1831), fol. b. a. 2. Clos- 

 terium Lunula Kiitz., Algas Aquat. siccatae, dec. iii. 

 No. 22. 1833, and Synopsis Diatomearum, Linna3a, 

 1833, p. 596. Closterium Lunula and acuminatum Corda, 

 Almanac de Carlsbad, 1835, p. 190. tafel 5. f. 56 60. 

 B B 



