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



form should not have been placed under Eu. quadriceps Nord. 

 The only similarity between them is the general outline in front 

 view. In side and end views tliey are entirely different, as well 

 as in the tumours and scrobiculae. Especially is this noticeable 

 in the polar lobe, from the cruciate form of which Eu. quadriceps 

 takes its name. The specimens heie tigured are certainly 

 Eu. dideltoides and were gathered from the same locality as 

 Raciborski's. 



Eu. LONGicoLLE Nord. /3 AUSTRALicuM, n.var. (T.iii f.6 



Semicellulae basi latiore, diametro tantum subduplo longiores, 

 e basi magis inflatae; collo minus producto; lobo polari paullo 

 magis inflato; semicellulae supra isthmum tumoribus singulis, 

 paullo supra tumoribus 4 instructae, tumoribus exterioribus e 

 margine orientibus, inter interiores scrobicula unica magna. 

 Cetera ut in forma typica. 



Long. cell. 140-147; lat. cell. 64-69; lat. lob. pol. 32; lat. coll. 

 U3-24; crass. 36/a. 



Botany, Centennial Park. 



Cf. No.dstedt, Alg. N. Z , p.33, T.3, f.5. 



This form is a member of a well defined group including Eii. 

 loiujicolle Nord. I.e. var. Himalyense Turn., Alg. E. Ind., T. "23, 

 f.9, var. capitatuiu West, Fr. Alg. Ceylon, T. 19, f.24; and three 

 described herein, viz., Eu. deniinutu/ti, Eu. bullatum, and Eu. 

 cainpanulatu7n, the last of which connects them with the dnuosum 

 group. They are almost altogether Australasian at present, 

 their characteristics being a well defined neck, campanulate base, 

 and strongly dilated head. 



Eu. SINUOSUM Lenor. f. germanica Rac, Desm. Nowe, p.31, T.2, 

 f.lO. (T.iii. f.9-10). 



Long. 64, 74, 77, 78; lat. 36, 42, 43, 43; lat. lob. pol. 18, 21, 21, 

 20; crass. 25, — , 21, — /x. 



Botany. 



I do not feel quite sure that all the specimens included above 

 should be referred to this species, yet they all come from the 



