ALGOLOGICAL NOTES 87 



Semicellulae cum verruca conica intra basin lobuli lateralis 

 uniuscujusque et verruca conica majori infra incisionem lobi 

 lateralis ; tumore centrali prominentiori, cum verrucis rotundatis 

 vel emarginatis circ. 9 ad marginem et in centro scrobiculis con- 

 spicuis 7-8. Long. 101-116 /x ; lat. 97-105 /x ; lat. lob. polar. 

 66-77 II ; lat. isthm. 31-37 /x; thickness 56-64 /x. (Fig. 4.) 



The Queensland specimens were from a small stream at Mos- 

 man. They agree with var. javanica better than with any other 

 variety of this species. Gutwinski's figures are poor and sketchy, 

 being of the nature of rough studies, so that it is often difficult to 

 reconcile his figures with his descriptions. In the present instance 

 the three accessory tumours (or verrucas) within each lateral lobe 

 are well described but scarcely discernible in his figures. 



Bernard (" Alg. unicell. d'eau douce Malais," Dep. Agric. aux 

 Indes-Neerland. Buitenzorg, 1909) does not discriminate between 

 Micrasterias Mobii and Euastrum turgidum Wallich, even though 

 it is quite impossible to reconcile Micrasterias Mobii " with 

 Wallich's description and figure of Euastnmi UtrgidtmiA Playfair 

 also (in Proc. Linn. Soc. N. S. Wales, xxxiii. 1908, pp. 610-612 I) 

 confuses these two Desmids. 



It would appear that Euastrum turgidum is a Desmid of the 

 Indo-Malay region, probably very rare, which requires further 

 investigation. I have not yet seen it, but I judge that such a 

 species exists, not merely from Wallich's original account, but 

 also from the somewhat poor figure published by Schmidle of a 

 specimen from Sumatra. 



M. Mobii appears to occupy a definite area in the eastern 

 tropics, extending from Singapore to N. Queensland, although, like 

 some other Desmids typical of this area, it has irregular extensions 

 further south in Australia. 



Spirulina peinceps W. & G. S. West in Trans. Linn. Soc. Bot. 

 ser. 2, vi. March, 1902, p. 205 ; G. S. West in Journ. Linn. Soc. 

 Bot. xxxviii. 1907, p. 179, t. 9, f. 5. S. Gomontii Gutw. in Bull. 

 Acad. Sci. Cracov. Nov. 1902, p. 613, t. 40, f. 69. S. gigantea 

 Schmidle in Engler's Bot. Jahrbiich. xxxii. 1903, p. 59, t. 1, f. 5. 

 Crass, trich. 4-5 /x ; diam. spir. 11-12 /x. Hah. Big Mosman 

 Eiver, Queensland. 



The specimens were more elongated than those I have pre- 

 viously examined from Ceylon and Central Africa, and not infre- 

 quently suddenly bent. 



AcHNANTHES CRENULATA Gruu. Not uucommou in all three 

 collections, and agreeing well with the description given by Cleve 

 (Synops. Navic. Diat. ii. 1895, p. 195) and the figures in Le 

 Diato7niste, vol. i. t. 9, f. 3, 4. It has previously been recorded 

 from Australia, New Guinea, and Samoa. 



* Vide Botan. Tidsskrift, 1901, t. 3, f. 21. 



t Wallich in Ann. Mag. Nat. Hist. ser. 3, vol. v. 1860, t. 14, f. 17, 18. 



I From Playfair's remarks on p. 612 he has apparently no conception of 

 the meaning of the term "life-history." His remarks throughout the paper 

 show an inability to appreciate the difference between ontogeny and phylogeny. 



