182 WORLD-DISTRIBUTION OF THE BRITISH CARYOPHYLLACE^. 



of the gills and pileus. The species included in the last three sub- 

 genera might more conveniently be classed in four, thus : — Margin 

 of pileus at first incurved, gills adnate, — Collyhia ; margin of pileus 

 at first incurved, gills decurrent, — OnipJialia, CollyharicB ; margin of 

 pileus at first straight, gills adnate or sinuate, — Mycena ; margin of 

 pileus at first straight, gills decurrent, — Omphalia, Mycenarm. Under 

 this arrangement various analogous species amongst the Hyporhodii, 

 Dermiiii, and Pratella, now so unsatisfactorily placed in such subgenera 

 as Namoria, etc., would fall naturally into proper positions. The 

 species figured is A. (Omphalia) fibula, Bull. Spores -00013" X -0008". 



(To he continued.J 



ON THE WOELD-DISTRIBUTION OF THE BEITISH 

 CAEYOPHTLLACEiE. 



By J. G. Baker, Esq., F.L.S. 



Having lately had occasion to go carefully through the Kew collec- 

 tion of Caryopliyllacecp, for the purpose of making a selection from 

 Gay's herbarium, to add to it, I have kept a copy of Watson's ' Com- 

 pendium' open on the table before me, and noted down in it any sta- 

 tions of which it seemed to me worth while to take account, in further 

 illustration of the world-distribution of the British species. In the 

 present paper I propose to report these, with a few comments on the 

 alliance or synonymy of some of the plants ; and I thought it would 

 be interesting in doing this, — the Order being one of those in which 

 the British species are, as a rule, marked off from one another by clear 

 lines of demarcation, and one of those in which, as compared with 

 other Natural Orders, our British species are the m-ost widely diffused 

 over the surface of the globe, — to enumerate all of them, and on the 

 foundation of Mr. Watson's sketch of their distribution in the ' Com- 

 pendium,' with these few additional data superadded, to arrange them 

 in groups according to their distribution over the world. 



The figures therefore prefixed to the names indicate the general geo- 

 graphical range of the species, and mean as follows : — 



I. That the species reaches the south temperate zone. 



II. That it reaches the north temperate zone in America, and is not 

 specially montane or boreal. 



III. That it reaches decidedly into the north temperate zone in Asia. 



