^iOQ fJnnaean Society, 



thereae, subquadrinervis, nervis duobus marginibus proximis distinctis, 

 mediis obsoletis. Lodiculce 2, coloratae, conicae, truncatae, glabrae, 

 angustae. Stamina 2 (?). Filamenta capillaria. Ovarium cylindricum, 

 glabrum. Styli filiformes, distantes. Stigmata laxe villosa. Caryopsis 

 elongato-cylindrica, compressiuscula, truncato-bidenticulata. Injlo- 

 rescentia : Spica simplex, disticho-subsecunda. — Gramina erecta, foliis 

 angustis, ligula brevi. 



1. P. calycinum, Nees. 

 Dineba calycina, Hb. Wight. 



2. P.fiiiforme, Nees. 



t3. P. unidentatum, Nees. 



Many new species belonging to genera previously established are 

 also characterized and described. 



February 16. — The Bishop of Norwich, President, in the Chair. 



Read "Observations on some new or little -known species of 

 Polyparia, found in the supercretaceous strata of Italy." By Signor 

 Giovanni Michelotti of Turin. 



March 2.— -Mr. Forster, V.P., in the Chair. 



Read a " Description of a new genus of Plants from Brazil." By 

 John Miers, Esq., F.L.S. 



The following are the characters of the new genus described : — 



TRIURIS. 



Flores dioici. Perianthii foliola 3, obovata, infra apicem processu longo 

 iiistructa. ^ Antherce 3? sessiles, lociilis disjunctis, imo androphoro 

 magno carnoso central! insertae. $ Pistilla numerosissima, aggregata, 

 supera. Styli siniplices, subulati. Fructus ignotus. — Planta pnsilla 

 hyalina, foliis paucis bractei/ormibus. 



T. hyalina. 



Ilab. in humidis Serra dos Orgaos Provinciae Rio de Janeiro. 



Mr. Miers observed this minute plant only in a single locality, and 

 was unable to find ripe fruit. He perceived, however, in each pistil- 

 lum what appeared to him to be a solitary ovule, but so minute and 

 indistinct as to be evident only by the appearance of a darker oval 

 form in the centre. He has consequently no positive evidence 

 whether it is Monocotyledonous or Dicotyledonous ; but is induced 

 by various considerations to refer it to the former class. He notices 

 the points in which it appears to him to bear some resemblance to 

 different Monocotyledonous families, and suggests that, as it cannot 

 be distinctly referred to any of them, it may probably be taken as 

 the type of a distinct order, holding a place between BurmanniacecB 

 and Fluviales. 



The processes which are noticed in the character as arising from 

 below the apices of the divisions of the perianthium, are described 

 as capillary tubes three times as long as the segments, within which 

 they are coiled up during aestivation, their apices exhibiting at the 

 apex of the bud three minute pore-like apertures open externally. 



