88 ON THE MEDICINAL AND TOXICOLOGICAL 



It contains a black matter, which may be used as ink. Mr. 

 Coste, of Philadelphia, wlio wrote a paper npon it, assures us, 

 says Merat, that his communication was written with it, as also 

 the letter which was addressed to the Academy. Diet, de M. 

 Med. Snpplem. vii. 17; Comptes-rendus hebd. de I'Acad. des 

 Sc. xiv. 667. 



Agat'icus callosus, Fr. Conic Dung Agaric. 



Sowerby informs us that this species nearly proved fatal to a 

 family in London. Crypt. Eng. 



The taste of the A. lateritius and fascicularis is very bitter 

 and nauseous. 



Agaricus insidiosus. 



Cited as poisonous by Orfila in his Traite des Poisons. 



Agaricus camjjanulatus. See A. alutaceus. 



Agaricus zo?iarius, Bull., Champ. 104; Poques ; \ Found in 



D. C. ; Fl. Fr. 375. t woods in 



" Jlexuosus, Pers., Syn. 431. ) Autumn. 



An abundant corrosive milk exudes from it. 



Agaricus urens, Pers., Syn. 333 ; Bull. 



Poisonous. Orfila, Traite des Poisons, iv. 427; Le?. de Med. 

 Leg. PI. 18, 1. It has a slightly acrid taste, and characters which 

 exclude it from the number of eatable species. 



Agaricus hariolarum, Bull. 585 ; Fries, Syst. Myc. i. 125 ; 



Koques' Hist. 264. 

 " sagarum^ Pers., Syn. 331. 

 This plant was used by the astrologers, magicians, and charla- 

 tans, for certain purposes. It can be eaten without fear. 



Amanita onuscaria. See Agaricus. 



There are no true Amanitas recognized in Mr. Berkley's 

 Crypt. Eng. 



The A. venenata is considered poisonous. Letellier states that 

 he found in A. hulhosa and "oerna an active principle, called ama- 

 natine, to which is ascribed their narcotic property. See Agari- 

 cus muscariv^. 



