314 FRESHWATER ALG^ OF LISMORE DISTRICT^ 



(30).Phorm. coriuin, Ph. tenue, Pled, nostocoriim, L. Lisraoren- 

 sis, and var. nigra, Calothrix Braiinii, Nitzschia suhtilis, and 

 var. palacea, Syn. ulna. 



The first-named, in each case, is the prevailing form. 



New forms. — In the following notes, two new genera have 

 been proposed, and 17 species, 33 variations, and 8 forms (58 in 

 all) have been described as previously unrecorded. These are 

 allocated as follows, Alg8e(53): — Phceophyceoi 5, Chlorophycece 20 

 (all but one are Volvocacece), Desmidiacece 18, Bacillariem 4, 

 MyxophycecG 6. Algal fungi (5): — Chytridiaceca 4, Schizomy- 

 cetes 1. 



PH^OPHYCE^. 

 Genus S y n u r a Ehr. 

 Synura uvella Ehr. (PI. xlv., f.l, 2.) 

 Cell. long. 22, lat. ll/v.. 

 Lismore (242); Wyrallah. 



Lemmermann, Plankt. Schwed. Gewass., p. 119, describes the 

 test of Synura uvella Ehr., as membranous ("membran hautar- 

 tig") which implies that it is smooth. I have restricted the 

 name, therefore, to such specimens. 



Synura granulosa, n.sp. (PI. xlv., f.3.) 



Test?e ovato-claviformes, fronte rotundatte, a tergo attenuatse; 

 granulis minutis sparsis ornatis. 



Coen. diam. 55-100; cell. long. 35, lat. 10 /x. 



Lismore (223, 241, 249, 260, 261). 



Synura granulosa is the common Synura of this country. The 

 test shows as a granulate hyaline border even in living specimens. 

 In all our forms of Synura, setae are very rarely present. G. S. 

 West, Br. Frw. Alg., p. 46, gives the colour of the chromatophores 

 as brownish-green in European specimens of Synura, but here 

 they are yellow-brown. 



Var. PUSiLLA, n.var. 

 Testae subglobosse, minute granulatse. Ccenobia parva, cellulis 

 paucis. 



Lismore (260). 



