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



8jhm.;* PL (Doc.) Wallichlanum Turn.;t PL (Doc.) ghriosum 

 Turn.t 



Forma gracilior, n.f. 



Exacte ut in forma typica sed gracilior, cellulae 20-30 plo. 

 longiores quam latae. 



Long. 408, 444, 532; lat. 18, 21, 18^. 



Auburn, Botany. 



Pl. NODOSUM Bail.,y DENTATUM Arch., Q.J. Micr. Sci. 1872, p. 194, 

 forma australica, n.f. 



Forma apice modice elongato, vix dilatato, dentibus 10 magnis 

 (fere aculeis) projicientibus. Semicellulae verticillis 4, in quoque 

 verticillo nodulis 6 prominentibus obtusis, fere truncatis, mem- 

 brana inter verticil los grosse punctata. 



Long. 324; lat. h^fx. 



Botany. 



Pl. baculoides (Roy & Bisset), Jap. Desm. p. 9, f.l8. 



Apices denticulis 1. rugis minutissimis 8-10 vix visibilibus 

 semper praeditae. Endochroma in taenias longitudinales 4 dis- 

 posita. MeraVn-ana subtilissime punctata. Cetera ut in Jap. 

 Desm. 



Long. 390, 400, 426, 428, 438; lat. 14, 15, 14, 15, 15;z. 



Auburn, Botany; Rose's Lagoon, Collector. 



Roy & Bisset (I.e.) give long, semicell 265^, lat. 15^, but the 

 figures tally exactly. The minute teeth were observed in every 

 case, but they are easily overlooked. 



Genus Triploceras Bailey. 



Trip, serratum, n.sp. (T.ii. f.2). 

 Trip, magnum, rectum, elongatum, 9-12 plo. longius quam 

 latum, (cum dentibus), basi ad apices sensim attenuatum, apicibus 

 aut 2 lobatis spinis geminatis intervenientibus, aut 4 lobatis lobis 



* Ost. Afrik. T.l, f.2 1-22. 



t Alg. E. Ind. T.3, f.2. 



+ I.e. T.3, f.5. 



