ARCHIV FOR MATHEMATIK OG NATURVIDENSKAB. B. XVIII. Nr. 2. 



Development of Estheria Paekardi, 



Brady, as shown by artificial hatching 

 from dried mud. 



With 4 autographic plates. 

 By G. O. S ars. 



Introduction. 



At the commencement of June this year, I received, 

 through the kindness of Mr. Whitelegge, several samples 

 of dried mud collected by him in the early days of April 

 from shallow pools in the neighbourhood of Sydney, and I 

 have thereby been enabled to continue my hatching experiments 

 also during the past summer. From 2 of the samples, ta- 

 ken, according to the label, from pools «off Botany Road, 

 near Waterworks Bridge», besides the usual Entomostraca, 

 a considerable number of larvæ of a Phyllopod also devel- 

 oped. This Phyllopod turned out to be the Estheria 

 Packardi, Brady, described from alcoholic specimens by the 

 author in a previous paper inserted in these Archives, together 

 with several other Australian Phyllopods. Having now 

 had an opportunity of studying the whole larval and post- 

 larval development of this form, I propose, in the present 

 paper, to give a short account of my observations coucerning 

 that part of the biology of the said interesting Phyllopod. In 



