ConjiigatiX), Dosraidiace;i3, Euastrum, 1075 



latius; semicellulis 3-lobatis, margitiibus levibus creiiatis, lobis 

 liueari-divisis, basi globoso-infiatis, lobo polari attenuato, leviter 

 depresso; prominentiis centralibus magais, duabus in quavis semi- 

 cellula; isthmo lato, sinu lineari stricto. 



llab. in Fistia stratiote ad «Rangoon)) in Birmania Asia) 

 (R. RoMANis). — Longit. 75 y.., latit. lobi polaris 24 [/., latit. ad 

 , basin 37 u.., latit. isthm. IG a. 



18. Euastrum incavatum Josh. et Nordst. in Joshua On some new 2590 

 and raro Desmidiete n. III, in the Journ. of Bot. Brit. and fo- 

 reign vol. XXIII, n. 266, p. 33, t. 254, f. 1, Wittr. et Nordst. 

 Alg. exsicc. n. 657 cum icone, Botaniska Notiser 1884, p. 126. — 

 cellula minima, incisura mediana lineari angusta (intra ostium paul- 

 lulo dihitata); semicellulis pyramidalibus, e basi dilatata seasim in 

 lobum polarem attenuatis, iateribus leviter retusis, angulis infe- 

 rioribus oblique truncatis, lobo polari superne tantum levissime 

 dilatato, margine superiore late rotundato, medio retuso, incavato, 

 angulis subacutis; semicellulis a latere visis ovatis; a vertice con- 

 spectis ellipticis; angulis superioribus et inferioribus oblique a ver- 

 tice visis utrinque parvo tumore ornatis; membrana glabra. 



Ilab. in (( Morces Cap )) ad (( Gordon Town )> in Jaraaica (I. 

 Hart). — Dimens. 40-43^24, lat. apic. 12 a., crassit. 14-16 [j.. 

 Habitu Micrasterias integra Nordst., Euastrum ansatum Ehrenb., 

 Euaslrum cuncatum Jenn. huic speciei proxima sunt. 



10. Euastrum sibiricum Boldt Sibir. Chloroph. p. 99, t. 5, f. 2. — 2591 

 Minimum, paullo lougius quam latius, subquadratum, profunde con- 

 strictum, sinu intimo lineari angustissimo, extremo pauUum am- 

 pliato acutangulo; semicellulis subhexagoniis, dorso aculeis binis 

 parvis instructo truncatis, lateribus superioribus sinu obtusangu 

 lo emarginatis, inferioribus rectis, in angulis aculeis siiigulis sub- 

 tilissimis instructis ; a latere visis subcircularibus, utrinque papil- 

 la mediana et apice aculeis binis armatis; a vertice visis ellipti- 

 cis, medio utrinque papilla, in utroque fine aculeis 5 subtilissimis 

 pra^ditis. 



Ilab. ad «Tunguska» Sibiriae (Boldt), in Japonia (RoY, Bisset); 

 iii U tricularia ad ((Fajardo, Puerto Rico » (Lagerheim). — 

 Diinens. 16,8-18« 14,4, lat. isthmi 3-3,6 a., crassit. 8,5 y.. Euastro 

 candiano Delp. et Euastro Gayano De-Toni proximum. 

 20. Euastrum Gayanum De-Toni, Euastrum formosum Gay Essai 9592 

 Monogr. Conjug. p. 55, t. I, f. 9. — Minutissimum, suboeque lon- 

 gum ac latura, rectangulare, sinu profundo, lineari,; semicellulis re- 



