Proceedings. 183 



[Microscopical and Natural History Section^ 



Ordinary Meeting, February nth, 1889. 



Mr. J. Cosmo Melvill, M.A., F.L.S., President of the 

 Section in the Chair. 



There were exhibited : — 



By Mr. P. Cameron : A collection of European Chry- 

 sididcB, containing nearly 60 species. 



By the PRESIDENT : Zizyphimis haliarchus, a new and 

 unique species of Troclms, described by him in the current 

 number of the Journal of Conchology, January, 1889. 

 The specimen belongs to the Museum Collection at 

 Owens College, having been formerly in the possession of 

 Mr. Reginald Cholmondeley, of Condover Hall, Salop. It 

 IS the fourth or fifth in size in the genus, most of the 

 larger species being natives of Australia or New Zealand, 

 From the former country the Z. haliarchus in all probability 

 •comes, but there has been some little misplacement in the 

 original labelling. It differs from all the existing species in 

 its truly conical and pyramidal contour, with straight sides, 

 light structure,smoothish whorls, being very minutely beaded 

 in close grained lines, the graining slightly larger and coarser 

 at the sutures, colour pale fawn, with darker brown flames 

 surrounding the periphery. Specimens of the nearest allies 

 to this new species were exhibited also for comparison. 

 The President also exhibited a form of Plantago maritima 

 new to this country, and a collection of other species of 

 Plantago for comparison, both British and European. 



Mr. H. C. Chadwick read a paper on two nematode 

 worms, Ascaris mystax, and Ascaris lunibricoides, and 

 showed specimens of both species. 



