CoDJugatoc, Desmidiaceac, Euastrum. 1107 



dentibu.s 2 acutis pncdito; lobis basalibus tridentatls, membrana 

 glabra in centro granulis 5, juxta marginom granulis 8 armata. 

 Jlab. iu stagnis turfosis ad a Gourgons, Chateauneuf-de-Ran- 

 don, Margeride n circa a Montpellier )) Galliro (F. Gay), iu Silesia 

 (Kirciiner), Groenlandia (Boldt); in Nova Zelandia (S. Berggren). 



— Sec. Nordst. Freshw. Alg. of N. Zeal. and Austral. p. 34, t. 3, f. 9, 

 inter specimina formaj typica? alia occurrunt granulis supra isthm. 

 non 4-5, sed 2 integris et insuper granulo vel tuberculo emargi- 

 nato qua) long. 24-30 a., lat. 18-20 p-., crass. 11 ^. prsebent. Ad 

 (( Taupo, Tokano, Omatangi » in Nova Zelandia (S, Berggren). — 

 Var. elongatum Nordst. Freshw. Alg. of N. Zeal. and Austral. p. 

 79, tab. 3, f, 10: pauUulo longius, lobo polari cum lobis laterali- 

 bus fere confluenti, unde latera semicellularum fere recta (granu- 

 lis acutiusculis 4) evadunt ; ceterum ut in forma novizelandica. In 

 (( Blue Mountains, New South Wales )) Australia^ (S. Berggren). 



— Long. 32-34 a., lat. 22 fji., crass. 13 /jt.. 



91. Euastrum ornithocephalum Bennett Freshw. Alg. p. 9, t. I, f. 12, 2663 

 in Notarisia 1886, p. 89. — Minutum, 57^30; semicellulis lobo 

 basali et intermedio rotundato, lobo terminali profunde inciso den- 

 teque prominenti instructo, avis caput iraitante; semicellulis di- 

 stincte constrictis, sinu extrorsum ampliato ; membrana tuberculata. 



Hab. in aquis stagnantibus « Loughrigg » Britanniaj (A. W. 

 Bennett). — Ad Euastro rostrato et E. pseudo-eleganti differt 

 prsecipue magnitudine. 



92. Euastrum retrorsum Josh. Burmese DesraidieaB p. 038, t. XXIII, 2664 

 f. 14-15, Notarisia 1886, p. 89. — Mediocre, diametro plus quam 

 duplo longius, prominentiis marginalibus instructum ; semicellulis 

 obscure 3-Iobatis, angulis lateralibus productis, versus apicem re- 

 curvis, centro inflatione raagna; raembrana crassa ; isthmo vix 

 attingente Y^ partem latitudinis; constrictione liueari. 



Uah. in Pistia stratiote ad « Rangoon » in Birraania Asia3 

 (RoMANis). — Long. 75 a., latit. apud punctum constrict. 35 [j.. 



93. Euastrum obesum Josh. Burmese Dcsmidiecie p. 638, t. XXIII, f. 2665 

 19-20, Notarisia 1886, p. 89. — Parvum, nonnihil longius quam 

 hitius, 50-80 « 30-35, isthmo 9-15 a. lato; semicellulis 3-Iobatis, 

 centro non inflatis; lobis globose rotuudatis, lobo polari inciso ; a 

 latere conspectis ovatis, apicibus truncatis ; membrana pallide car- 

 jiea, aliquando indistincte granulata. 



Hab. in Pistia stratiote ad « Rangoon » in Birmania Asise 



(ROMANIS). 



