SOME EXOTIC FUNGI. 
101 
Hymenochaete tuberculosa, Che. 
Tota resupinata, crassa, durissima, tuberculosa, purpureo- 
umbrina, subtus ferruginea. Setis sparsis, rigidis, acutis (‘Ob-'OG x 
•008 mm.). 
On bark. Rio Janeiro. (12332.) 
Extending in a thick, hard tuberculated crust for several inches. 
Most nearly related to H. corticolor, B. & C., but thicker, harder, 
and different in colour. 
Stereum portentosum, B. ^ C. 
On bark. (12333 ) 
Midotis regularis, Cke.ti; Phil. 
Erumpens. btipite brevi, ramoso ; ramulis brevissimis. 
Cupulis concavis, fuscis, punctatis ; margine inflexo. Hymenio 
obscuriore, lievi. Ascis cjlindraceis. ISporidiis ellipticis (’01- 
*013 X ‘OOJ-'OOb mm.) Parapliyses linearibus. 
On rotten wood. Rio Janeiro. (9162.) 
WITTROCK AND NORDSTEDT’S ALG^. 
The seventh fasciculus of Wittrock and Nordstedt’s “ Algm 
aquee dulcis exsiccatje ” includes the following new species of 
Desmids, chiefly Brazilian: — 
Eesmidium laticeps, Nordst. 
Habitu Desmidio cylindrico (Grev.), simile at latitudo cellu- 
larum longitudine circiter triplo (vel sub-quadruplo) major est, 
latitudo marginis, apicalis circiter diametro transversalis 
cellulae, crassitudo cellulae fere dimidium longitudinis. 
Var. a ellipticum. 
Long •023-’028 mm., lat. -OyG-'OfSmm. crass., -ObG'-ObS mm., 
isthm. *07 mm- 
Var. quadrangulare. 
Long •02-*023 mm., lat. •076-*082 mm. crass., '054-‘06 mm., 
isthm. ‘068 '074 mm. 
In freshwater. Brazil. 
Closterium subcostatum, Nordst. 
Habitu Cl. costato (Ralfs, t. 29, f. 1), simile, sed brevius, 
diametro 5-plo longius, apicibus angustioribus obtusis, membrana 
(rufa) costis longitudinalibus 11-12, in ipso apice rotundato nullis, 
nucleis amylaceis secundum observationes A. Lofgren factas sparsis, 
locello apicali parvo corpuscula 1-5 includente. 
Lat, 05-06 mm., long •25-‘3 mm., lat. apic. •012-'014 mm. 
In clay ditches. Brazil. 
Allied to dost. Isis, Cohn (Desm., Bong., t. xi, f. 15), in which 
the disposition of the amylaceous nuclei are not noted, but more 
curvate. 
