Bi - 
— 14 — BE ERRUL. 
S. rn nov. sp. (S. previspina Cleve Bidrag, pag. 
S. mediocre, diametro fere quarta parte longius, pro- 
fundissime constrietum, sinu acutangulo, valde ampliato; 
semicellule obverse elliptico-semieireulares, dorso truncatx 
vel levissime retus®, ventre alte convex®, in utroque polo 
rotundato spinula minutissima subpapilliformi ornat®; e ver- 
tice vis® trigon®, angulis truncato-rotundatis ‚ spinula bre- 
vissima instructis, lateribus levissime retusis. Latitudo isthmi 
quadrans diametri longitudinalis cellule. Membrana subti- 
lissime punctata. 
Long. 0,0017—2“ —= 43-52 u; Lat. 0,0014— 165” — 
36—42 u; Lat. isthmi 0,00043—48” — 11—12,3 u. 
S. dejectum Breb. 
y. connatum nov. var. 
Var. sinu acuto subrectangulo, isthmo elongato nullo; 
semicellule ventre alte convexx, dorso truncat® vel levissime 
retuse, utroque fine rotundats, angulis (superioribus) obtusis, 
spinula elongata, piliformi, rejecta, instructis; e vertice vis® 
trigon®, lateribus levissime retusis, angulis rotundatis , spi- 
nula breviori ornatis. 
Long. s. spinul. 0,00088”—22,4 u; Lat. 0,00083“ — 21 u; 
Lat. isthmi 0,00026 = 6,6 u; Long. spin. 0,0003 — 5" — 
8—13 u. 
S. pterosporum nov sp. 
S. parvum, tam longum quam latum‘, ineisura mediana 
profunda, latissima; semicellule subceuneat®, sursum dila- 
tatze, dorso truncat, lateribus rectis, angulis subacutis, acu- 
leo subtilissimo instructis; e vertice vis trigon®, lateribus 
rectis, angulis subacutis, subtiliter cuspidatis, Latitudo 
isthmi dimidium diametri transversalis cellule, 
Zygosporz rectangulares, compress®, angulis in lo- 
bum late productis, lobi formam semicellularum residuarum 
semulantes et in iis quasi in thecis conditi. 
Long. cell. s. acul. = Lat. s. acul. 0,00055-— 59" — 
14—15 #; Long. acul. 0,00016“ = 4 u; Long. zygosp. s. 
lob. 0,0008” = 20 u; Lat. s. lob. 0,0005” = 13 u. 
S. megacanthum nov. sp. 
S. mediocre, cireiter tam longum quam latum (s. acul.), 
profundissime constrietum, sinu acutangulo vel subrectan- 
gulo; semicellule fere triangulari-fusiformes, introrsum ven- 
tricos®, dorso subtruncat® vel leviter convexs®, utroque 
fine in aculeum validum attenuat®; a vertice vis® tri- vel 
tetragon®, lateribus retusis, angulis in aculeum firmum pro- 
