226 VEGETABLE PAEASITES. 



fungus of the root of the hair ; Robin classified it with Mucedo 

 in his first edition ; it belongs, however, to Aspergillus, the species 

 of which are known to thrive on masses of fatty matter in a state 

 of decomposition. 1 



Literature. Beobachtungen von Cysten mit Fadenpilzen 

 aus dem anssern Gehorgange, Miiller's ' Archiv/ 1844, p. 401, 

 tab. x, figs. 1 4. 



XI. Aspergilii species. 



Affinis Aspergilii capitati capitulo aureo, seminibus rotundis. 

 Muffa dorata, gambata (cum Aspergillo capitato, capitulo glauco 

 seminibus rotundis, Micheli). 



Here we find 



1. Filaments or tubes of the mycelium. It is composed of 

 several very rigid, transparent, and branched tubes, separated 

 by partition walls, and consisting of several elongated cells, with 

 a few very small granulations, which are not, however, spores, 

 as Pacini thought. The single cells were 00090*200 mm. 

 Jong, the diameter of the tubes was 0*010, the thickness of their 

 walls 0*001 mm. They were not very numerous in the ear, but 

 could not be preserved by Pacini underneath glass plates, and 

 mixed with gum and arsenic. 



2. Receptacular filaments, of pretty nearly the same diameter, 

 0-009 0-013, with a capitulum of 0-060 0-142 mm. ; they varied 

 in length according to the degree of development, being about 0*770 

 mm. Their form was very regular, of a rose colour, transparent, 

 and possessing a strong power of resistance. They exhibited a 

 clear cavity without granules, with two lines on each side. The 

 stalk was thin at the base, with two or three small angular pro- 

 jections. Pacini mistook them for little roots. The stalk be- 

 comes then of a somewhat more uniform and larger diameter, and 

 narrows once more shortly before the receptaculum, forming a 

 kind of sheath analogous to the calyx of flowers. It bears a 

 spherical inflation on its further end, the receptaculum = placenta 

 (Micheli), which is thicker in young persons than in old. Its 

 contents are a little granulated, according to Pacini ; it lies in the 

 centre of the capitulum, which is perfectly spherical, 0*060 0*100 

 mm. in diameter. The colour varied with the age and diameter, 

 that of younger individuals being dark yellowish-red, and from 



1 Appendix C. 



