207 
Long. 0,009—10" = 23 — 25 fjt. Lat. s. vag. 0,0014" == 
36 /i, c. vag. 0,0021" — 54 fi. Long. zygosp. 0,0019" = 
48 /w. Lat. 0,0013" = 32 (jt, 
2. D, quadrangulatum Ralfs in Ann. Nat. Hist. v. 15, p. 405, 
t. 12, f. 9; Desra. quadrangulare Ktz. Phyc. germ. p.-d41. 
Long. 0,00087" = 22 fi. Lat. s. vag. 0,0014—16" = 
36—41 ft, c. vag. 0,0019" = 48 ft. 
Gonatozygon De By. 
Hedv. I, Nr. 16, mut. char.; Conj. p. 76. 
1. G, Ralfsii De By. Conj. p. 76; Docidium? asperum 
Ralfs Br. Desm. p. 156, ex parte, t. XXVI, f. 6 a et b, non c. 
Diam. 0,00045" — 11,5 ft. 
tenuior. 
Diam. 0,00018—30" = 4,6—7,7 ft. 
Cosmarium Corda. 
Carro Alm. de Carlsbad 1835 sec. Aut.; mut. char,; Ralfs Br. 
Desm. p, 91. 
1. C. margaritiferum (Turp.) Menegh. Synops. p. 219; Ur- 
sinella margaritifera Turp. in Atl. Diction. Scienc. Nat. Vég. vé- 
sicul. (1820) fig. 23 a, b, c, sec. Turp. in Mém. du Mus. XVI, 
p. 316, t. XIII, f. 19, quæ figura non hue pertinet, ut videtur. 
Semicellulæ isthmi lato sæpe connexæ. 
Long. 0,002" = 48 ft. Lat. 0,0013—15" = 33—38 ft. 
Crass. 0,00083" = 21 ft. 
2. C. Botrytis (Bory) Menegh. Syn. p. 220; Heterocarpella 
Botrytis Bory in Diet. Class. 1825 p. 180. 
Long. 0,0018" = 46 ft. Lat. 0,0016" = 40 ft. Crass. 
0,001" = 26,6 ft. 
Tantum una semicellula a me visa est. 
3. C. porrectum n. sp. Tab. III, fig. 28. 
C, mediocre, circiter tam longum quam latum, quadrangu- 
atum, utroque polo retusum, lateribus repandis, incisura mediana 
14* 
