286 M. C. Montagne's Organograpliic and Physiologic 



The hymenophore of Polyporei produces tubes instead of gills. 

 In Boletus these tubes, which may be regarded as gills rolled round 

 (a \ae\v which is confirmed by the structure of Fistidina), adhere 

 loosely ; and, as the trame of the pileus does not pass into them, 

 they are easily separated without injur}^ It is not so with Polypo- 

 rus, the trame of the pileus supplying the skeleton, as it were, of the 

 tubes or pores which the hymenium lines ; they cannot therefore be 

 separated from the hymenophore, or from each other, as in Boletns. 

 The pores vary in form and size. Sometimes, as in Dcedalea, they 

 are deep labyrinthiform sinuses formed by frequent anastomosing of 

 agaricinoid gills ; sometimes they are in the form of five- or six-sided 

 alveoli,, as capacious and as regular as the cells of bees ; sometimes 

 these pores are so minute as scarcely to be visible by a good lens. 

 All intermediate conditions are found. They are round or angular, 

 regular or irregular, short or long, equal or unequal, simple or dis- 

 posed in layers (stratose), &c. The substance Avhich separates them 

 is called dissepiment. Their colour, though variable, is perhaps less 

 so than in Ac/aricus. Their aperture {os) affords good characters ; 

 it is sharp or obtuse, entire or toothed, torn, velvety, &c. Their 

 cavity is often clothed with a glaucous or silvery substance. In 

 GlcBoporus, the pores, which are almost imperceptible in a dry state, 

 have not their dissepiments formed by the trame of the hymenophore, 

 but are hollowed out in a gelatinous hymenium, heterogeneous and 

 of a different colour, analogous to that of AuriculuricE, to which this 

 new genus forms a transition. 



The hymenophore of Hydna is bristly below, with teeth or prickles 

 {denies, aculei), sometimes with simple tubercles, as Radulum, or se- 

 riate interrupted gills, as Sistotrema ; these prickles are of greater or 

 less length, more or less voluminous, and approximate. The distinct 

 aculeiform tubes of the genus Fistidina are not separable from the 

 pileus, from whence we may infer that they are formed from the 

 trama, and that this genus forms the transition from Polypori to 

 Hydna. In all the other genera of the tribes the prickles are solid, and 

 very variously formed and coloured. As in the preceding and follow- 

 ing tribe, the hymenophore offers the same variations as we have al- 

 ready made known in Agaricini, that is to say, that it is sessile or 

 stipitate, with the stem central or lateral, entire or dimidiate, fre- 

 quently reversed, and in this case reduced sometimes to a thin layer 

 of arachnoid tissue, pulverulent as it were, from whence the prickles 

 arise. Lastly, that of Auriculm'inece is raised sometimes into radi- 

 ating veins {Cymatoderma* = Cladoderris, P.), into mammiUse, as in 

 Grandinia, or into papillae, as in Thelephora, or perfectly smooth, 

 as in Stereum. The hymenophore of Clavai-iee is vertical, simple 

 or branched, rarely foUaceous, the upper portion being linguiform, 



* Judging by the figure and description, I suspect that this genus, lately 

 established by Junghuhn (Tijdschr. voor Natur. Geschied. en Physiol. 2—3 

 stuck, 1840) on a fungus of Java, scarcely differs from Thelephora dendri- 

 tica, Pers., gathered in the island of Rawak by IM. Gaudicliaud, on the ex- 

 pedition of the Uranie, commanded by M. Freycinet. — See Mont. Ann. So. 

 Nat., Nov. 1841, and Berk. Hook. Load. Journ. Bot. No. 3. 



