302 Prof. T. R. Jones and Mr. J. W. Kirkby on the 



Nascia, Curt. 

 Type N. cih'ah's, Hiib., Curt. Brit. Ent. xli. 599. 



Nascia citrinalis^ sp. n. 



Fore wings pale straw-colour, tinged with yellowish 

 towards the hind margin, with a yellowish spot at end of the 

 cell and slightly darker below the costa ; fringes silvery 

 white, with a dark leaden-grey base. Hind wings pale 

 straw-colour, tinged with grey, much greyer along the costa ; 

 fringes also straw-colour. Head, thoi'ax, and abdomen con- 

 colorous. Underside paler, with a brown subcostal streak in 

 the fore wing. 



Expanse of wings 28 millim. 



One female from Dharmsala. 



Distinguished at once by its smoothness and total absence 

 of markings or streaks, 



[To be continued.] 



XLVI. — Notes on the Palaeozoic Bivalved Entomostraca. — 

 No. XXX. On Carboniferous Ostracoda from Mongolia* . 

 By T. RuPEET Jones, F.R.S., and James \V. Kirkby, 

 Esq. 



[Plate XVI.] 



The Ostracoda figured on the accompanying Plate represent 

 the leading forms of a series of specimens brought to Russia 

 from ]\Iongolia, in a small collection of Carboniferous fossils, 

 by the eminent traveller M. G. N. Potanin, and wliich have 

 been selected and sent to us by M. P. N. Wcnjukotf, of the 

 Geological ]\luseum in the Imperial University at St. 

 Petersburg. 



Most of the species, if not all, are well known also as 

 British fossils ; but we think them of sufficient interest for 

 special notice on account of their coming from so distant a 

 locality. It was previously known tliat certain of these 

 species enjoyed a great range in time, being common to both 



• No. XXIX. appeared in the Ann. & Mng. Nat. Hist, for October 

 1800. 



