164 SOME NEW OR LESS KNOWN DESMIDS FOUND IN N. S. WALES, 



Trip, denticulatum, n.sp. (T.ii. f.ll). 



Trip, mediocre, gracilliuium, elongatum, 16plo. longius quam 

 latum. Semicellulae e basi ad apices leniter attenuatae; infla- 

 tionibus rofcundatis 11 ornatae; inflationibus seriebus dentium 

 minutorum patentum binis praeditis; apicibus 3 (2-4 1) lobatis; 

 lobis dentibus minutis singulis (vel binis '?) instructis. 



Long. 371; lat. 23/i. 



Murray's Lagoon, Collector. 



Most like Trip. (Doc.) occidentah Turn.,* which, however, has 

 verticils with aculei pointing up and down the cell. Compare 

 also WoUe (Desm. U. S., Doc. gracih, T.IO, f.3). 



Genus Icthyocercus West. 

 Ic. AUSTRALiENSis, n.sp. (T.ii. f.8). 



Icth. magnus, gracilis, circ. 15plo. longior quam latus, medio 

 levissime constrictus. Semicellulae paullulo attenuatae, lateribus 

 rectis, basi leviter inflatae, apice aegre dilatatae angulis in cornua 

 minuta, acuta, productis. Membrana achroa, glabra. 



Long 144; lat. 10^. 



Botany. 



This comes very near to Ic. longisphms (Borge),* which I 

 cannot consider a variety of Ic. angolensis. Ic. anstraliensis is 

 half as long again, inflated at the base, and with tiny horns 

 instead of spines. This is, as far as I know, only the third 

 record of the genus. It is known also from Angola and Guiana. 

 Cf. /c. angolensis West (in Journ. Bot. xxxv. T. 368, f.26-3i). 



Genus Closterium Nitzsch. 



Cl. Moukense, n.sp. CT.ii. f. 1). 



Cl. permagnum, rectum, fusiforme, diametro circ. 9 plo. longius, 

 utroque polo leniter attenuatum, ventre in medio planum apices 

 versus recurvatum, dorso leniter arcuatum, apicibus subobtusis, 



"" 'On some New Desm.', Journ E. Micr. Soc. (2) v. 1885, T.15, f.25 

 t Trop. u. subtrop. T.2, f.51. 



