222 Linncean Society. 



therejie, subquadrineivis, nervis duobus margiiiibus proximis distinctis, 

 mediis obsoletis. Lodicula 2, coloratse, conlcse, truncatae, glabrae, 

 angustie. Stamina 2 (?). Filcuucnta capillaria. Ovarium cylindricum, 

 glabrum. StijU filiformes, distantes. Sti(jmata laxe villosa. Caryopsis 

 elongato-cylindrica, compressiuscula, tnuicato-bidenticulata. Inflo- 

 rescentia : Spica simplex, disticbo-subsccuiula. — Gramina erecta, foliis 

 angustis, ligula brevi. 



1. P. calycinuni, Nees. 

 Dineba calycina, Hb. Wight. 



2. P.fiUforme, Nees. 



3. P. unidentatum, Nees. 



Many new sjiecies 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 

 Poly par ia, 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. 



Flares dioici. Perianthii foliola 3, obovata, infra apieem processu longo 

 instructa. <J Authera 3? sessiles, loculis disjunctis, imo androphoro 

 magno carnoso centrali insertte. $ Pistilla numerosissima, aggregata, 

 supera. Styli simplices, subulati. Fructus ignotus. — Planta pusilla 

 hyalina, foliis paucis hracteiformibns. 



T. hyalina. 



Hah. in liumidis Serra dos Orgaos Provincise 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 bj- 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 Burmanniaceee 

 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 cajjillary 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. 



