On some Indian Phyllopoda. 25 



other known bivalve Phyllopoda, that it must not only form 

 the type of a distinct genus, but also, in my opinion, that of 

 a particular family, occupying a position between the Esthe- 

 riidæ and Limnetidæ. 



Gen. Cyclestheria, G. O. Sars. 

 Remarks. — This genus was established by the present 

 author in the year 1887, to include a peculiar Australian 

 Phyllopod, which was found to be identical with the above- 

 mentioned form described by Baird. It was referred to the 

 family Limnadiidce, which, however, at that time was taken 

 in a much wider sense than is done in the present paper. 

 The genus as yet only comprises a single species. 



Cyclestheria Hislopi (Baird). 



(Pl. IV, figs. 13, 14.) 



Estheria Hislopi (Baird), Proceed. Zool. Soc. London. Vol. XXVII, 

 p. 232, PL LXIII, fig. 1. 



Remarks. — This form, first briefly described by Baird in 

 the above-mentioned journal, has subsequently been subjected 

 to a very careful examination by the present author (i), who 

 succeeded in raising this remarkable Phyllopod from dried 

 Australian mud, and thereby had the opportunity of study- 

 ing in detail, not only its morphology, but also its develop- 

 ment, which turned out to be totally different from that of 

 any of the earlier known Phyllopoda. As a very full de- 

 scription, accompanied by numerous figures, has been given 

 in another place by the present author, I think that a re- 

 newed description is not needed, and I here only give 2 

 figures of the shell from an adult female in the collection of 



Q) G. O. Sars, On Cyclestheria Hislopi (Baird), a new type of bi- 

 valve Phyllopoda. Chr. Vid. Selsk. Forhandl. 1887. 



