BULLETIN 



OF TIIK 



TORREY BOTANICAL CLUB. 



Vol. Vlll.l New York, January. 1881. . [Mo. I. 



I, 



* 



Water 



By Francis Wolle. 



Species and Varieties of Desmlds new to Science. 



^Plate VI.) 



Micrasierias Mahabuleshwarensis, Hobson, van American^. ;/. 

 var, (Plate VL, Fig. i). This plant does not quite conform to the 

 one described by Hobson. It has similar end-lobes, but the margms 

 of the lateral ones are more like those of M. Americana, Ehrb. The 

 lobes themselves are unlike ; in the one they are entire, in the other 

 they are divided into two lobules. (Cf. Figs i and 2.) This may 

 be a variety referred to by Rabenhorst in his Flora Europaea Al- 

 garum, Vol. III., p. 196, where he says : '' M. Americanae forma esse 



videtur/' r -n- 



Micrasierias Americana, Ehrb., var. recta, Wolle (Plate \ I., Fig. 



2). Described in Bulletin, Vol. VL, -p. 122. 



MiCRASTERIAS PSEUDOFURC ATA, «. Sp. (Plate VI., Fig. 3). M. 



magna, levis ; semicellulis trilobis; lobis basalibus attenuatis, pro- 

 funde incisis; lobulis plus minus divergentibus, apice bidentatis ; 

 lobo polari anguste cuneato; angulis longe sub-rectis productis ; apice 



// rr 



trifurcatis. Diam. .006 — .007 



J 



/' 



of the middle lobe. t- \ m 



MiCRASTERIAS TRIANGULARIS, «. Sp. (Plate VI., Fig. 4.) _ M. 



permagna, orbicularis; semicellulis quinquelobis ; lobo polan trian- 

 gulari lateralibus rectis vel leviter undulatis, subaequaliljus, angulis, 

 lateris in mucronem productis ; lobulis et lobis intermediis aequah- 

 bus, repetito-bilobulatis ; lobulis bifurcatis, angulis cum spiniscurvato- 

 divergentibus elongatis armatis. Diam. .009"— .01 . 



Hab In pond on Broadtop Mountain, Pa. 

 The lobules next the sinus, and next the polar lobe are not untre- 

 quently a simple point, not bifurcate, /•ni f^ vi 



Micrasierias pinnatifida, Ktz. var. tnflata, Wolle. (Plate VI., 

 Fig O Described in BuLLETix, Vol. VI.. p. 122. 



Colmarium trregulare, Wolle. (Plate VI, Fig. 6.) Described m 



Bulletin, Vol. VI.. p. 186. 



CosM AKIUM MARG ARITU.M, u. sp. ( Plate VI, \ ig. 7, front vievv; 7.^ 

 side view ; ib, end view ; 7A zygospore with young plants attached). 

 C. parvum, variabile, suborbiculare, modo depressum, modo ad ter- 

 tiam longius quam latius ; sinu anguste lineari ; semicellu is subor- 

 bicularibus, ambitu undulato-crenatis, crenis lateribus plerumque 

 triundulatis, scrobiculis basalibus modice instructis ; dorso convexis 

 nonnunquam retusis; a vertice visis ovalibus, medio v entricosis inflatis; 



•A few of these forms were described in the BuLi.EriN, Vol. VI.. pp. I21-123. 

 and I86, and. as figures have been aske.l for, t.hey are herewith ijiven ..n the ac- 

 companying Plate (Plate VI). 



