MB. W. JOSH PA ON BURMESE DESMIDIEJS. 635 



As might be expected, some of Wallich's and Grunow's species 

 exist here, as also others of Tropical America; vhile some hear a 

 strikingresemb lance to forms found by Dr. Schweinfurth in Central 

 Africa, and described by Prof. Cohn in ' Desmidieae Bongoenses,' 

 one especially noticeable, Cosmarium Euastron, having the re- 

 markable cuneiform-stellate markings seen in his G. tholiforme. 

 Cosmarium Partialis, Closterium Isidis, and JBleurotaenium nodu- 

 losum, De Bary, f. tenuior, also closely resemble some of the 

 Rangoon forms. Docidium, Euastrum, and Micrasterias are 

 well represented, as may be expected in an exotic list. Of the 

 186 species and varieties, in 16 genera, collected by Dr. Eomanis, 

 100 have their representatives in Europe ; and of the 7 Docidiese, 

 4 are new. 



The drawings have been made by a vertical camera, and en- 

 larged from 200 to 900 diam. The list, though a long one, is, I 

 feel sure, only tentative ; for if a further search be made in other 

 parts of the empire, doubtless many more interesting novelties 

 will yet be found. 



DESMIDIE^, Kutz. 



1. Desmldium, Ag. 



D. (Aplogonum) Bailetii, f. tetbagona, Delponte. 

 D. Schwabtzii, Ag. Conjugated : zygospores. 

 D. cvlindbicxjm, Grev. 



D. quadratum, Nbrdst. Conjugated zygospores. (PI. XXII. 

 fig. 3.) 



D. QUADRANGULATTTM, Rttlfs. 



2. Ontchonema. 



O. ljste, Nordst. Conjugated: zygospores. 



3. Bambusina, Kutz. 

 B. Bbebissonii, Kutz. 



4. Spn^ROZOSMA, Corda. 

 S. pulchbum, Bailey, fi. tbilobum, n. var. (Plate XXII. 

 figs. 1 & 2.) 



& cellulis triplo latis quam longis, breviter utrinque convexia 

 forma irregularibus, a vertice conspectis 3-lobatis, lobis baai 



3 b 2 



