34 Natural History Bulletin. 



called the veil and when enclosing simply the hymenial sur- 

 faces as we have here supposed, is said, to be -partial^ when 

 more extensive so as to enclose stipe and all, we have a 

 volva and the condition described as '■'■veil universal.'''' As the 

 pileus expands the veil is rent, often in such a fashion as to 

 leave a portion of it surrounding the stipe as a collar or frill — 

 the ammlus (ring). 



Other terms used will be for the most part self-explana- 

 tory, or will be explained in their proper connection. 



The group or family as here described includes a number 

 of genera distinguished by characters pertaining to the pileus 

 and lamellae. The twelve following are represented in our 

 flora: 



Section I. Fimgi putrescent, soon perishing. 



1. Lamellae thin membranaceous, not deliquescent, 



"trama^ filamentous continuous with the sub- 

 stance of the pileus: edge acute, 2" - - Genus Agaricus. 



2. Lamellae as in Agarictcs but soon melting into 



an inky fluid, - - - - - Genus Coprixus. 



3. Lamellae as in Agaricus trama floccose, "spores 



rusty ochre;" "veil cobwebby," - - Genus Cortixarius. 



4. Lamellae as in Agaricus but more or less waxy 



or watery, Genus Hygrophorus. 



5. Lamellae as in Agaricus, but with milky juice. Genus Lactarius. 



6. Lamellae as in Agaricus, but rather dry and 



fragile; "trama vesiculose," - - - Genus Russula. 



7. Lamellae with edge obtuse, . . - . Genus Cantharellus. 



Section II. Fungi persistent, becoming dry and tough. 



8. Lamellae with edge acute, entire but dry and per- 



sistent, .--.-.- Genus Marasmius. 



9. Lamellae thin, tough, more or less distinctly ser- 



rate or denticulate, . . - . - Genus Lentinus. 



10. Fungi soft and fleshy when moist; lamellae acute 



entire, -------- Genus Panus. 



11. Lamellae cleft, the parts revolute, - - Genus Schizohpyllum. 



12. Lamellae disposed in concentric circles, - Genus Cyclomyces. 



1. The trama is the body or central portion of the lamella. It is hoped 

 that our next issue will contain plates illustrating this and such other structu- 

 ral peculiarities as cannot be pointed out to the naked eye. 



2. Berkeley's Outlines. 



