410 PROCEEDINGS: BOSTON SOCIETY NATURAE HISTORY. 
Puccinia incarcerata Lev., Ann. Sci. Nat., Bot., hi, 3 : 69. 1845. 
Ustilago? Cissi Tul., Ann Sci. Nat., Bot., in, 7 : 92. 1847. 
Geminella exotica Schrot., Iledw., 15 : 135. 1876. 
Geminella exotica var. de Candollei Eisch. de Waldh., Apery. Syst. Ust., 
43. 1877. 
Schroeteria Cissi de Toni, Sacc. Syll. Fung., 7 2 : 501. 1888. 
Mykosyrinx Cissi Beck, Ann. K. K. Natur. Hofmus. Wien, 9: 123. 1894. 
Exsiccati: Mykosyrinx Cissi (DC.) Beck, on Cissus sp., Krypt. Exs. 
Editae a Musce Pal. Vind., 11; Schroeteria Cissi (DC.) de Toni, on Cissus, 
Syd., Ust., 48. 
Sori in peduncles and pedicles of the inflorescence, distorting the 
infected parts somewhat and filling their interior with a dusty, 
purple black spore mass ; spores dark reddish brown, subopaque, 
chiefly subspherical, spherical, or occasionally slightly angled, two 
celled, with a common enveloping outer membrane which ruptures 
at juncture of cells allowing these to separate at their margin though 
still attached at the bulging centers, smooth, about 11-14 p. (indi¬ 
vidual cells) in length. 
Hosts : Cissus acida , Porto Rico ; C. erosa , Porto Rico; C. sicy- 
oides , Fla., Bahamas, Jamaica, Porto Rico, San Dom. (type Uredo 
cyssi ); Cissus sp., Dominica (type) ; Vitaceae , Haiti, Mex. 
This genus, which is based largely on this species, has rather 
obscure or as yet ill defined characters. It does not seem very dis¬ 
tinct from Schizonella. The germination of the spores not having 
been reported leaves its generic position somewhat in doubt. 
Literature: 12, 38, 39, 139. 
Sorosporium Rud. 
Linnaea, 4: 116. 1829. 
Type: Sorosporium Saponariae Rud. 
Host: Saponaria officinalis. Germ. 
Sori in various parts of the host, forming dusty dark colored 
spore masses; spore balls composed of numerous fertile cells, often 
rather loosely united and frequently at maturity completely sep¬ 
arating, of medium size; spores usually olive or reddish brown, of 
medium size ; germination similar to that of ITstilago, sometimes 
with elongated germ thread and no sporidia. 
